IMMOBILIZER (DIAGNOSTICS)
IM(diag)

IMMOBILIZER (DIAGNOSTICS) > Basic Diagnostic Procedure
PROCEDURE
1. WITHOUT KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM

When the body integrated unit (except for C5 model) or the immobilizer CM (C5 model) is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. PERFORM CUSTOMER INTERVIEW.
no

2

yes
2. CONFIRM NUMBER OF REGISTERED IMMOBILIZER KEY.
yes

Perform the instructed procedures.

no

3

3. CHECK SECURITY INDICATOR LIGHT.
no

Perform the instructed procedures.

yes
4. CHECK KEY SWITCH.
yes

Perform the instructed procedures.

no

5

5. CHECK SECURITY INDICATOR LIGHT.
yes

8

no

6

6. CHECK SECURITY INDICATOR LIGHT.
yes

8

no

7

7. CHECK ENGINE START.
yes

Perform the instructed procedures.

no

9

8. CHECK ENGINE START.
yes

Perform the instructed procedures.

no

10

9. CHECK DTC.
yes

11

no

Perform the instructed procedures.

10. CHECK DTC.
no

Perform the instructed procedures.

yes
11. CHECK FREEZE FRAME DATA.
no

12

yes
12. CHECK DTC.
yes

Perform the instructed procedures.

no

13

13. PERFORM DIAGNOSIS.
yes

Perform the instructed procedures.

no

Perform the instructed procedures.

1. PERFORM CUSTOMER INTERVIEW.

Ask the customer when and how the trouble occurred using the interview check list. IMMOBILIZER (DIAGNOSTICS)>Check List for Interview

Did you interview the customer?

2

Perform the interview, and 2

2. CONFIRM NUMBER OF REGISTERED IMMOBILIZER KEY.

Confirm the number of registered immobilizer key. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is the number of registration 0?

Register the immobilizer system.

3

3. CHECK SECURITY INDICATOR LIGHT.
1.

Remove the ignition key from ignition switch.

2.

Wait at least 60 seconds.

Does the security indicator light blink?

4

Check the security indicator light circuit. IMMOBILIZER (DIAGNOSTICS)>Warning Light Illumination Pattern

4. CHECK KEY SWITCH.

Insert the ignition key in the ignition switch. (OFF or ACC)

Does the security indicator light remain blinking?

Check the key switch circuit. IMMOBILIZER (DIAGNOSTICS)>Diagnostics with Phenomenon>INSPECTION > CHECK KEY SWITCH CIRCUIT

5

5. CHECK SECURITY INDICATOR LIGHT.

Check the security indicator light status in the condition of step 4.

Does the security indicator light go off?

8

6

6. CHECK SECURITY INDICATOR LIGHT.

Turn the ignition switch to ON.

Does the security indicator light go off?

8

7

7. CHECK ENGINE START.

Turn the ignition switch to START.

Does the starter operate?

Check the LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure

9

8. CHECK ENGINE START.

Turn the ignition switch to START.

Does the engine start?

Immobilizer system is normal.

10

9. CHECK DTC.

Read the following DTCs using Subaru Select Monitor. BODY CONTROL(DIAGNOSTICS)>Diagnostic Trouble Code (DTC) IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

- Body Control (except for C5 model)

- Immobilizer (for C5 model)

If the communication function of the Subaru Select Monitor cannot be executed properly, check the communication circuit. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure for Subaru Select Monitor Communication

Are any DTCs displayed?

Record the DTC, time stamp and freeze frame data, and 11

Replace the body integrated unit (except for C5 model) or the immobilizer CM (C5 model). SECURITY AND LOCKS>Body Integrated Unit SECURITY AND LOCKS>Immobilizer Control Module

10. CHECK DTC.

Read the DTC of [Engine Control System] using the Subaru Select Monitor. ENGINE (DIAGNOSTICS)(H4DO)>Diagnostic Trouble Code (DTC)

If the communication function of the Subaru Select Monitor cannot be executed properly, check the communication circuit. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure for Subaru Select Monitor Communication

Are any DTCs displayed? (Current malfunction)

Record the DTC, time stamp and freeze frame data, and 11

Perform the diagnosis for engine system. ENGINE (DIAGNOSTICS)(H4DO)>Basic Diagnostic Procedure>PROCEDURE

11. CHECK FREEZE FRAME DATA.

Check the freeze frame data. IMMOBILIZER (DIAGNOSTICS)>Freeze Frame Data

Are the data recorded?

Record the data. 12

12

12. CHECK DTC.

Check the displayed DTC.

Are DTCs irrelevant to the immobilizer displayed? (Current malfunction)

Perform the diagnosis according to DTCs irrelevant to the immobilizer first.

13

13. PERFORM DIAGNOSIS.
1.

Perform the diagnosis for the displayed DTCs. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>LIST

2.

Repair or replace the cause of trouble.

3.

Using the Subaru Select Monitor, perform the following clear memory. COMMON(diag)>Clear memory

- Body Control (except for C5 model)

- Immobilizer (for C5 model)

4.

Execute the inspection mode. IMMOBILIZER (DIAGNOSTICS)>Inspection Mode

5.

Read the following DTCs using Subaru Select Monitor. BODY CONTROL(DIAGNOSTICS)>Diagnostic Trouble Code (DTC) IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

- Body Control (except for C5 model)

- Immobilizer (for C5 model)

Are any DTCs displayed? (Current malfunction)

Repeat step 13 until DTC is not shown.

Finish the diagnosis.

2. WITH KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM

For immobilizer diagnosis of model with the keyless access with push button start system, refer to “Keyless Access with Push Button Start System”. KEYLESS ACCESS WITH PUSH BUTTON START(DIAGNOSTICS)>Basic Diagnostic Procedure

IMMOBILIZER (DIAGNOSTICS) > Check List for Interview
CHECK

Inspect the following items regarding the vehicle’s state.

Immobilizer Check List for Interview Brought in on: Year Month Date
Customer’s name | Registration No. | Initial year of registration Year Month Date
Vehicle model | Frame number
Interviewer | Inspector | Engine type | Odometer reading
Customer specified content • • •
Date and time when the trouble occurred |  | Frequency of trouble occurrence | Always occurs Sometimes occurs ( times per day, times per month)
Condition of trouble occurrence (How the trouble occurs) |  | Weather | Fine • Cloudy • Rainy • Snowy • Others ( )
Temperature | °C (°F) — °C (°F)
Road conditions |
Road condition |
Accessory installation condition |
Diagnostic trouble code |
Time stamp |
Control module item number/Ver. |
Condition of trouble occurrence (How the trouble occurs) |
Vehicle bring-in history information |

IMMOBILIZER (DIAGNOSTICS) > General Description
CAUTION

- Do not use the electrical test equipment on the airbag system wiring harnesses and connector circuits.

- Be careful not to damage the airbag system wiring harness.

- While diagnostic items are being checked, do not operate radios, portable telephones, etc. which emit electromagnetic waves near or inside the vehicle.

- When turning the ignition switch to ON or OFF while diagnostic items are being checked, do not allow keys with different ID codes close to the ignition switch. If the ignition key is on a key holder, remove it from the key holder before performing diagnoses.

- When repeatedly turning the ignition switch to ON or OFF while diagnostic items are being checked, it should be switched in cycles of “ON” for at least 5 seconds → “OFF” for at least 8 seconds.

  (1) | Ignition switch position
  (2) | Sec.

- If the engine fails to start with a registered ignition key, detach the ignition key from ignition switch and wait for approx. 1 second until security indicator light begins to flash. And then start the engine again.

- Before performing the diagnostics, obtain all keys for the vehicle from the owner.

- Do not register a body integrated unit already registered to another vehicle to diagnose failures or inspect functions.

IMMOBILIZER (DIAGNOSTICS) > General Description
INSPECTION

Before performing diagnosis, check the following items which might be related to immobilizer malfunction.

1. BASIC INSPECTION
1.

Check the battery. STARTING/CHARGING SYSTEMS(H4DO)>Battery>INSPECTION

2.

Check the main and other fuses, harnesses and connectors. Also check for proper grounding.

IMMOBILIZER (DIAGNOSTICS) > General Description
PREPARATION TOOL
1. SPECIAL TOOL

ILLUSTRATION | TOOL NUMBER | DESCRIPTION | REMARKS
| — | SUBARU SELECT MONITOR 4 | Used for setting of each function and troubleshooting for electrical system. For detailed operation procedures, refer to “Help” of application.

2. GENERAL TOOL

TOOL NAME | REMARKS
Circuit tester | Used for measuring resistance, voltage and current.
DST-i | Used together with Subaru Select Monitor 4.
Oscilloscope | Used for measuring the waveform.

IMMOBILIZER (DIAGNOSTICS) > General Description
SYSTEM BLOCK DIAGRAM

- Other than for C5 model

  Refer to BODY CONTROL SYSTEM (DIAGNOSTICS). BODY CONTROL(DIAGNOSTICS)>General Description>SYSTEM BLOCK DIAGRAM

- C5 model

IMMOBILIZER (DIAGNOSTICS) > Electrical Component Location
LOCATION

(1) | Security indicator light | (4) | Combination meter | (6) | Ignition key
(2) | Body integrated unit | (5) | Immobilizer antenna | (7) | Immobilizer control module (C5 model)
(3) | Data link connector |  |  |  |

IMMOBILIZER (DIAGNOSTICS) > Inspection Mode
PROCEDURE

It is possible to diagnose the DTC by performing the indicated inspection mode. After correcting the DTC, perform a necessary inspection mode and make sure that the function is resumed correctly and the DTC is recorded.

1. INSPECTION MODE 1

DTC | Item | Note
B1401 | COMBINATION METER COLLATION | —
B1402 | IMMOBILIZER KEY COLLATION | —
B1407 | COMBINATION METER COMMUNICATION | —
B1408 | COMBINATION METER NON-VOLATILE MEMORY | —
B1410 | TRANSPONDER COMMUNICATION | —
B1411 | IMMOBILIZER ANTENNA | —
B1413 | IMMOBILIZER CONTROL MODULE BATTERY POWER SUPPLY | —

Diagnostic procedure:

1.

Using the Subaru Select Monitor, perform the clear memory of [Body Control] or [Immobilizer]. COMMON(diag)>Clear memory

2.

Read the DTC of [Body Control] or [Immobilizer] using Subaru Select Monitor and check that the DTC is not displayed. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis for the displayed DTCs. After solving the DTC, repeat from step 1).

3.

Remove the ignition key from the ignition switch, and insert again.

4.

Turn the ignition switch OFF → ON, and wait for 10 seconds or more.

5.

Read the DTC of [Body Control] or [Immobilizer] using Subaru Select Monitor and check that the DTC is not displayed. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis for the displayed DTCs.

2. INSPECTION MODE 2

DTC | Item | Note
B1412 | IMMOBILIZER CONTROL MODULE CAN REGISTER STUCK | —
B1414 | IMMOBILIZER CONTROL MODULE NON-VOLATILE MEMORY | —

Diagnostic procedure:

1.

Using the Subaru Select Monitor, perform the clear memory of [Immobilizer]. COMMON(diag)>Clear memory

2.

Using the Subaru Select Monitor, read the DTC of [Immobilizer] to check that there is no DTC displayed. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis for the displayed DTCs. After solving the DTC, repeat from step 1).

3.

Disconnect the ground terminal from the battery sensor, reconnect it , and then wait for one minute or more.

4.

Turn the ignition switch to ON.

5.

Using the Subaru Select Monitor, read the DTC of [Immobilizer] to check that there is no DTC displayed. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis for the displayed DTCs.

3. INSPECTION MODE 3

DTC | Item | Note
B1571 | REFERENCE CODE INCOMPATIBILITY (IMMOBILIZER CM TO ECM) | —
B1572 | IMM CIRCUIT EXCEPT ANTENNA CIRCUIT | —
B1576 | ECM EEPROM | —
B1577 | IMMOBILIZER CM EEPROM | —
B1578 | METER | —

Diagnostic procedure:

1.

Using the Subaru Select Monitor, perform the clear memory of [Engine Control System]. COMMON(diag)>Clear memory

2.

Using the Subaru Select Monitor, read the DTC of [Engine Control System] to check that there is no DTC displayed. ENGINE (DIAGNOSTICS)(H4DO)>Diagnostic Trouble Code (DTC)

If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis for the displayed DTCs. After solving the DTC, repeat from step 1).

3.

Start the engine, and then run the engine at idle for 10 seconds or more. Or, disconnect the ground terminal from the battery sensor, reconnect it, then turn the ignition switch from OFF to ON and wait for 10 seconds or more.

4.

Using the Subaru Select Monitor, read the DTC of [Engine Control System] to check that there is no DTC displayed. ENGINE (DIAGNOSTICS)(H4DO)>Diagnostic Trouble Code (DTC)

If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis for the displayed DTCs.

IMMOBILIZER (DIAGNOSTICS) > Warning Light Illumination Pattern
INSPECTION

Blinks when the key is removed from the ignition switch.

Goes off when the registered key is inserted into the ignition switch.

IMMOBILIZER (DIAGNOSTICS) > Warning Light Illumination Pattern
WARNING LIGHT DOES NOT ILLUMINATE

Wiring diagram:

Immobilizer system WIRING SYSTEM>Immobilizer System>WIRING DIAGRAM

When the body integrated unit (except for C5 model) or the immobilizer CM (C5 model) is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. CHECK FUSE.
1.

Remove the ignition key from ignition switch. Or, turn off the power.

2.

Check the fuse.

Is the check result OK?

2

Replace the fuse. If the replaced fuse blows out easily, repair the short circuit in the harness between the fuse and body integrated unit.

2. CONFIRM DESTINATION.

Verify the destination of the vehicle.

Is destination for C5?

3

9

3. CHECK IMMOBILIZER CM.

Using the Subaru Select Monitor, check the following items in the [Data monitor] of [Immobilizer]. IMMOBILIZER (DIAGNOSTICS)>Data Monitor

- Ignition SW input

Does the display change in accordance with the ignition switch OFF ←→ ON?

7

4

4. CHECK IGNITION SWITCH CIRCUIT.
1.

Turn the ignition switch to OFF.

2.

Remove the F/B fuse No. 3.

3.

Measure the voltage between F/B fuse No. 3 (lower stream side) and chassis ground.

Connector & terminal

F/B fuse No. 3 (downstream side) (+) — Chassis ground (−):

Is the voltage 6 V or more?

Repair the short circuit to power supply in harness between the immobilizer CM and fuse.

5

5. CHECK IGNITION SWITCH CIRCUIT.

Using the Subaru Select Monitor, check the following items in the [Data monitor] of [Immobilizer]. IMMOBILIZER (DIAGNOSTICS)>Data Monitor

- Ignition SW input

Is the display «ON»?

Replace the immobilizer CM. SECURITY AND LOCKS>Immobilizer Control Module

6

6. CHECK IGNITION SWITCH CIRCUIT.
1.

Disconnect the connector from immobilizer CM.

2.

Measure the resistance between immobilizer CM connector terminal and fuse.

Connector & terminal

(i34) No. 2 — F/B fuse No. 3 (downstream side):

Is the resistance less than 10 Ω?

Replace the immobilizer CM. SECURITY AND LOCKS>Immobilizer Control Module

Replace the open circuit of harness between the immobilizer CM and fuse.

7. CHECK IMMOBILIZER CM.

Using the Subaru Select Monitor, check the following items in the [Data monitor] of [Immobilizer]. IMMOBILIZER (DIAGNOSTICS)>Data Monitor

- key-lock warning SW

Does the display change in accordance with the ignition key removal/insertion?

8

Check the key switch circuit. IMMOBILIZER (DIAGNOSTICS)>Diagnostics with Phenomenon>INSPECTION > CHECK KEY SWITCH CIRCUIT

8. CHECK IMMOBILIZER CM.
1.

Using the Subaru Select Monitor, check the following items in the [Data monitor] of [Immobilizer]. IMMOBILIZER (DIAGNOSTICS)>Data Monitor

- Immobilizer indicator output

2.

Remove the ignition key from ignition switch.

3.

Wait at least 60 seconds.

Is [BLINK] displayed?

9

Replace the immobilizer CM. SECURITY AND LOCKS>Immobilizer Control Module

9. CHECK SECURITY INDICATOR LIGHT.
1.

Disconnect the connector from body integrated unit.

2.

Connect the resistor (100 Ω) between the body integrated unit connector terminal (i171) No. 20 and chassis ground.

Does the security indicator light illuminate?

10

12

10. CHECK BODY INTEGRATED UNIT GROUND CIRCUIT.

Measure the resistance between the body integrated unit connector terminal and chassis ground.

Connector & terminal

(B287) No. 1 — Chassis ground:

(i84) No. 4 — Chassis ground:

Is the resistance less than 10 Ω?

11

Repair the open circuit of the body integrated unit ground circuit.

11. CHECK BODY INTEGRATED UNIT POWER SUPPLY CIRCUIT.

Measure the voltage between the body integrated unit connector terminal and chassis ground.

Connector & terminal

(B281) No. 7 (+) — Chassis ground (−):

(B280) No. 1 (+) — Chassis ground (−):

Is the voltage 10 V or more?

Replace the body integrated unit. SECURITY AND LOCKS>Body Integrated Unit

Check the harness for open or short circuit between body integrated unit and fuse.

12. CHECK COMBINATION METER CIRCUIT.
1.

Remove the combination meter. INSTRUMENTATION/DRIVER INFO>Combination Meter

2.

Measure the voltage between combination meter connector terminal and chassis ground.

Connector & terminal

(i10) No. 1 (+) — Chassis ground (−):

Is the voltage 10 V or more?

13

Check for an open or short circuit in the harness between the combination meter and fuse.

13. CHECK COMBINATION METER CIRCUIT.

Measure the resistance between the body integrated unit connector terminal and combination meter connector terminal.

Connector & terminal

(i171) No. 20 — (i10) No. 19:

Is the resistance less than 10 Ω?

LED bulb is defective. Replace the combination meter case assembly. INSTRUMENTATION/DRIVER INFO>Combination Meter>DISASSEMBLY

Repair the harness or connector.

IMMOBILIZER (DIAGNOSTICS) > Warning Light Illumination Pattern
WARNING LIGHT REMAINS ON

For the diagnostic procedures, refer to “WARNING LIGHT DOES NOT COME ON”. IMMOBILIZER (DIAGNOSTICS)>Warning Light Illumination Pattern>WARNING LIGHT DOES NOT ILLUMINATE

IMMOBILIZER (DIAGNOSTICS) > Diagnostic Procedure for Subaru Select Monitor Communication
INSPECTION
1. Engine Control System

If the communication with [Engine Control System] is not possible, refer to ENGINE (DIAGNOSTICS). ENGINE (DIAGNOSTICS)(H4DO)>Basic Diagnostic Procedure>PROCEDURE

2. Body Control

If the communication with [Body Control] is not possible, refer to BODY CONTROL SYSTEM (DIAGNOSTICS). BODY CONTROL(DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE

3. Immobilizer

Detecting condition:

- Defective harness

- Power supply circuit malfunction

- Defective immobilizer CM

- Body integrated unit malfunctioning

- Defective CAN communication circuit

- Defective Subaru Select Monitor

Trouble symptom:

Communication with [Immobilizer] is faulty.

Wiring diagram:

Immobilizer system WIRING SYSTEM>Immobilizer System>WIRING DIAGRAM

1. CHECK FUSE.
no

Perform the instructed procedures.

yes
2. CHECK LAN SYSTEM.
no

Perform the instructed procedures.

yes
3. CHECK DATA MONITOR.
yes

Perform the instructed procedures.

no

4

4. CHECK HARNESS.
no

Perform the instructed procedures.

yes
5. CHECK HARNESS.
no

Perform the instructed procedures.

yes
6. CHECK IMMOBILIZER CM.
yes

Perform the instructed procedures.

no

Perform the instructed procedures.

1. CHECK FUSE.

Check the fuse.

Is the check result OK?

2

Replace the fuse. If the replaced fuse blows out easily, repair the ground short circuit in the harness between the battery — immobilizer CM.

2. CHECK LAN SYSTEM.

Inspect LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure

Is the check result OK?

3

Perform the inspection according to the diagnosis for LAN system.

3. CHECK DATA MONITOR.
1.

Turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, check the following items in the [Data monitor] of [Immobilizer]. IMMOBILIZER (DIAGNOSTICS)>Data Monitor

- BATT voltage

Is the display 10 V or more?

Replace the immobilizer CM. SECURITY AND LOCKS>Immobilizer Control Module

4

4. CHECK HARNESS.
1.

Turn the ignition switch to OFF.

2.

Disconnect the immobilizer CM connector.

3.

Turn the ignition switch to ON.

4.

Using a tester, measure the voltage between the immobilizer CM connector and chassis ground.

Connector & terminal

(i34) No. 2 (+) — Chassis ground (−):

(i34) No. 1 (+) — Chassis ground (−):

Is the voltage 10 — 13 V?

5

Repair the open circuit of harness between the immobilizer CM connector and fuse.

5. CHECK HARNESS.

Using a tester, measure the resistance between the immobilizer CM connector and chassis ground.

Connector & terminal

(i34) No. 5 — Chassis ground:

Is the resistance less than 1 Ω?

6

Repair the open circuit of harness between the immobilizer CM connector and chassis ground.

6. CHECK IMMOBILIZER CM.
1.

Turn the ignition switch to OFF.

2.

Connect the immobilizer CM connector.

3.

Perform communication with the immobilizer CM.

Is communication possible?

- The circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  - In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

Replace the immobilizer CM. SECURITY AND LOCKS>Immobilizer Control Module

IMMOBILIZER (DIAGNOSTICS) > Data Monitor
OPERATION

- For detailed operation procedures, refer to “Common (Diagnostics)”. COMMON(diag)>Data Monitor

- For details on the data monitor, refer to the list. IMMOBILIZER (DIAGNOSTICS)>Data Monitor>LIST

IMMOBILIZER (DIAGNOSTICS) > Data Monitor
LIST
1. Engine Control System

For data monitor of [Engine Control System], refer to ENGINE (DIAGNOSTICS). ENGINE (DIAGNOSTICS)(H4DO)>Basic Diagnostic Procedure>PROCEDURE

2. Body Control

Other than for C5 model

Refer to BODY CONTROL SYSTEM (DIAGNOSTICS) for the data monitor of [Body Control]. BODY CONTROL(DIAGNOSTICS)>Data Monitor

3. Immobilizer

C5 model

Items to be displayed | Content / display range | Standard | Note
Trip Count [count] | Time stamp information | — | —
Count | Time stamp information | — | —
Time Count [msec] | Time stamp information | — | —
BATT voltage | Immobilizer CM battery voltage | 6 — 16 V | —
Ignition SW input | Ignition switch status | ON: Switch ON OFF: Switch OFF | —
key-lock warning SW | Key warning switch status | ON: Switch ON OFF: Switch OFF | —
Immobilizer indicator output | Security indicator output status | Turn Off: Indicator OFF Blink: Indicator blinking ON: Indicator ON blink (one): Registration of one ignition key blink (two): Registration of two ignition keys blink (three): Registration of three ignition keys blink (four): Registration of four ignition keys | —

IMMOBILIZER (DIAGNOSTICS) > Freeze Frame Data
OPERATION

- For detailed operation procedures, refer to “Common (Diagnostics)”. COMMON(diag)>Freeze Frame Data

- For details on freeze frame data, refer to the list. IMMOBILIZER (DIAGNOSTICS)>Freeze Frame Data>LIST

IMMOBILIZER (DIAGNOSTICS) > Freeze Frame Data
LIST
1. Engine Control System

For freeze frame data of [Engine Control System], refer to ENGINE (DIAGNOSTICS). ENGINE (DIAGNOSTICS)(H4DO)>Basic Diagnostic Procedure>PROCEDURE

2. Body Control

Other than for C5 model

Freeze frame data of Body Control is not recorded.

3. Immobilizer

C5 model

Items | Content / display range
Trip Count [count] | Time stamp information COMMON(diag)>Time Stamp
Count
Time [msec]
Battery Voltage | Immobilizer CM battery voltage
Ignition SW input | Ignition switch status
key-lock warning SW | Key warning switch status
Immobilizer indicator output | Security indicator output status
Immobilizer SET/ UNSET status | Immobilizer SET/UNSET status

IMMOBILIZER (DIAGNOSTICS) > Diagnostic Trouble Code (DTC)
OPERATION

- For detailed operation procedures, refer to “Common (Diagnostics)”. COMMON(diag)>Diagnostic Trouble Code (DTC)

- For details on DTCs, refer to the list. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>LIST

IMMOBILIZER (DIAGNOSTICS) > Diagnostic Trouble Code (DTC)
LIST

If DTCs irrelevant to the immobilizer are displayed, perform diagnosis according to the DTCs irrelevant to the immobilizer first.

1. Engine Control System

Code | Description & trouble part | Reference
B1571 | REFERENCE CODE INCOMPATIBILITY (IMMOBILIZER CM TO ECM) | IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1571 REFERENCE CODE INCOMPATIBILITY (IMMOBILIZER CM TO ECM)
B1572 | IMM CIRCUIT EXCEPT ANTENNA CIRCUIT | IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1572 IMM CIRCUIT EXCEPT ANTENNA CIRCUIT
B1576 | ECM EEPROM | IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1576 EGI CONTROL MODULE EEPROM
B1577 | IMMOBILIZER CM EEPROM | IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1577 IMM CONTROL MODULE EEPROM
B1578 | METER | IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1578 METER

2. Body Control

Other than for C5 model

Code | Description & trouble part | Reference | Relation between ECM and DTC
B1401 | COMBINATION METER COLLATION | IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1401 METER COLLATION | B1578
B1402 | IMMOBILIZER KEY COLLATION | IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1402 IMMOBILIZER KEY COLLATION | B1572
B1407 | COMBINATION METER COMMUNICATION | IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1407 MET COMMUNICATION | B1578
B1408 | COMBINATION METER NON-VOLATILE MEMORY | IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1408 METER NON-VOLATILE MEMORY | B1578
B1410 | TRANSPONDER COMMUNICATION | IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1410 TRANSPONDER COMMUNICATION | B1572
B1411 | IMMOBILIZER ANTENNA | IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1411 IMMOBILIZER ANTENNA | B1572

The starter relay control is performed in immobilizer system. When the body integrated unit detects a nonconformity of reference code, it immediately outputs a starter relay cut signal to ECM, and then ECM stops the starter relay operation. In this case, engine does not start, and DTC is not recorded in ECM. Therefore, check DTC on the body integrated unit to identify the cause of the engine not starting.

3. Immobilizer

C5 model

Code | Description & trouble part | Reference | Relation between ECM and DTC
B1402 | IMMOBILIZER KEY COLLATION | IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1402 IMMOBILIZER KEY COLLATION | B1572
B1410 | TRANSPONDER COMMUNICATION | IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1410 TRANSPONDER COMMUNICATION | B1572
B1411 | IMMOBILIZER ANTENNA | IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1411 IMMOBILIZER ANTENNA | B1572
B1412 | IMMOBILIZER CONTROL MODULE CAN REGISTER STUCK | IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1412 IMMOBILIZER CONTROL MODULE CAN REGISTER STUCK | —
B1413 | IMMOBILIZER CONTROL MODULE BATTERY POWER SUPPLY | IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1413 IMMOBILIZER CONTROL MODULE BATTERY POWER SUPPLY FAILURE | —
B1414 | IMMOBILIZER CONTROL MODULE NON-VOLATILE MEMORY | IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1414 IMMOBILIZER CONTROL MODULE NON-VOLATILE MEMORY | B1577

The starter relay control is performed in immobilizer system. When the immobilizer CM detects a nonconformity of reference code, it immediately outputs a starter relay cut signal to ECM, and then ECM stops the starter relay operation. In this case, engine does not start, and DTC is not recorded in ECM. Therefore, check DTC on the immobilizer CM to identify the cause of the engine not starting.

IMMOBILIZER (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B1401 METER COLLATION

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

Reference code incompatibility between combination meter and body integrated unit

Trouble symptom:

- Engine will not start.

- The security indicator illuminates.

When the combination meter is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. CHECK COMBINATION METER REGISTRATION.

Perform registration of combination meter. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is registration complete?

Currently, it is normal. (Combination meter registration is not complete.)

Refer to “Correspondence table when registration is not possible” in the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume. If the registration still does not work properly, replace the combination meter. INSTRUMENTATION/DRIVER INFO>Combination Meter

IMMOBILIZER (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B1402 IMMOBILIZER KEY COLLATION
1. OTHER THAN FOR C5 MODEL

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

Use of unregistered key in body integrated unit.

Trouble symptom:

- Engine will not start.

- The security indicator illuminates, when the ignition key is inserted into the ignition switch or when the ignition switch is turned to ON.

When the body integrated unit or combination meter is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. CONFIRM NUMBER OF REGISTERED IGNITION KEY.
no

Perform the instructed procedures.

yes
2. CHECK IGNITION KEY.
yes

Perform the instructed procedures.

no

3

3. REGISTRATION OF IGNITION KEY.
yes

Perform the instructed procedures.

no

Perform the instructed procedures.

1. CONFIRM NUMBER OF REGISTERED IGNITION KEY.
1.

Turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, check the number of registered ignition keys. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is one or more ignition key(s) registered?

2

Register the immobilizer.

2. CHECK IGNITION KEY.
1.

Prepare all the pre-registered ignition keys.

2.

Insert the ignition key in the ignition switch.

3.

Turn the ignition switch to ON.

4.

Read the DTC of [Body Control] using the Subaru Select Monitor. BODY CONTROL(DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

5.

Perform step 2) to 4) with another registered ignition key.

Is DTC B1402 displayed for all ignition keys? (Current malfunction)

Refer to “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume, and perform the actions for the case that all keys are faulty/lost.

3

3. REGISTRATION OF IGNITION KEY.

Register the key. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is the key registration completed normally?

Malfunction occurred in ignition key.

Replace the ignition key.

2. C5 MODEL

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

Use of unregistered key in immobilizer CM.

Trouble symptom:

- Engine will not start.

- The security indicator illuminates, when the ignition key is inserted into the ignition switch or when the ignition switch is turned to ON.

When the immobilizer CM is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. CONFIRM NUMBER OF REGISTERED IGNITION KEY.
no

Perform the instructed procedures.

yes
2. CHECK IGNITION KEY.
yes

Perform the instructed procedures.

no

3

3. REGISTRATION OF IGNITION KEY.
yes

Perform the instructed procedures.

no

Perform the instructed procedures.

1. CONFIRM NUMBER OF REGISTERED IGNITION KEY.
1.

Turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, check the number of registered ignition keys. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is one or more ignition key(s) registered?

2

Register the immobilizer.

2. CHECK IGNITION KEY.
1.

Prepare all the pre-registered ignition keys.

2.

Insert the ignition key in the ignition switch.

3.

Turn the ignition switch to ON.

4.

Read the DTC of [Immobilizer] using the Subaru Select Monitor. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

5.

Perform step 2) to 4) with another registered ignition key.

Is DTC B1402 displayed for all ignition keys? (Current malfunction)

Refer to “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume, and perform the actions for the case that all keys are faulty/lost.

3

3. REGISTRATION OF IGNITION KEY.

Register the key. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is the key registration completed normally?

Malfunction occurred in ignition key.

Replace the ignition key.

IMMOBILIZER (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B1407 MET COMMUNICATION

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

Communication failure between body integrated unit and combination meter

Trouble symptom:

- Engine will not start.

- The security indicator illuminates.

When the combination meter is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. CHECK DTC.
1.

Turn the ignition switch to ON.

2.

Read the DTC of [Body Control] using the Subaru Select Monitor. BODY CONTROL(DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is a DTC other than DTC B1407 displayed for [Body Control]? (Current malfunction)

Perform the diagnosis for DTC other than B1407.

Check the combination meter. COMBINATION METER (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE

IMMOBILIZER (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B1408 METER NON-VOLATILE MEMORY

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

Defective combination meter

Trouble symptom:

- Engine will not start.

- The security indicator illuminates.

When the combination meter is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. CHECK COMBINATION METER REGISTRATION.
1.

Turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, perform the clear memory of [Body Control] and [Combination Meter]. COMMON(diag)>Clear memory

- Body Control

- Combination Meter

3.

Perform registration of combination meter. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

4.

Read the DTC of [Body Control] using the Subaru Select Monitor. BODY CONTROL(DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC B1408 displayed? (Current malfunction)

Replace the combination meter. INSTRUMENTATION/DRIVER INFO>Combination Meter

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

IMMOBILIZER (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B1410 TRANSPONDER COMMUNICATION
1. OTHER THAN FOR C5 MODEL

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

Communication failure between ignition key and body integrated unit

Trouble symptom:

- Engine will not start.

- The security indicator illuminates.

When the body integrated unit is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. CHECK IGNITION KEY.
no

Perform the instructed procedures.

yes
2. CHECK IGNITION KEY.
no

Perform the instructed procedures.

yes
3. CHECK DTC.
yes

Perform the instructed procedures.

no

4

4. CHECK IMMOBILIZER ANTENNA.
yes

Perform the instructed procedures.

no

Perform the instructed procedures.

1. CHECK IGNITION KEY.
1.

Remove the ignition key from the ignition switch.

2.

Insert the ignition key into the ignition switch, and then turn the ignition switch to ON.

3.

Using the Subaru Select Monitor, perform the clear memory of [Body Control]. COMMON(diag)>Clear memory

4.

Read the DTC of [Body Control] using the Subaru Select Monitor. BODY CONTROL(DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC B1410 displayed? (Current malfunction)

2

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  It is possible that the surrounding radio wave environment was poor.

2. CHECK IGNITION KEY.
1.

Prepare a spare ignition key that is already registered.

2.

Insert the ignition key into the ignition switch, and then turn the ignition switch to ON.

3.

Read the DTC of [Body Control] using the Subaru Select Monitor. BODY CONTROL(DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC B1410 displayed? (Current malfunction)

3

Malfunction occurred in ignition key. Or the key has not been registered.

3. CHECK DTC.

Read the DTC of [Body Control] using the Subaru Select Monitor. BODY CONTROL(DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC B1411 displayed? (Current malfunction)

Perform the diagnosis of DTC B1411. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1411 IMMOBILIZER ANTENNA

4

4. CHECK IMMOBILIZER ANTENNA.
1.

Insert the ignition key into the ignition switch, and then turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, perform the clear memory of [Body Control]. COMMON(diag)>Clear memory

3.

Read the DTC of [Body Control] using the Subaru Select Monitor. BODY CONTROL(DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC B1410 displayed? (Current malfunction)

Replace the body integrated unit. SECURITY AND LOCKS>Body Integrated Unit

Malfunction occurred in the immobilizer antenna, ignition key or body integrated unit.

2. C5 MODEL

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

Communication failure between ignition key and immobilizer CM

Trouble symptom:

- Engine will not start.

- The security indicator illuminates.

When the immobilizer CM is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. CHECK IGNITION KEY.
no

Perform the instructed procedures.

yes
2. CHECK IGNITION KEY.
no

Perform the instructed procedures.

yes
3. CHECK DTC.
yes

Perform the instructed procedures.

no

4

4. CHECK IMMOBILIZER ANTENNA.
yes

Perform the instructed procedures.

no

Perform the instructed procedures.

1. CHECK IGNITION KEY.
1.

Remove the ignition key from the ignition switch.

2.

Insert the ignition key into the ignition switch, and then turn the ignition switch to ON.

3.

Using the Subaru Select Monitor, perform the clear memory of [Immobilizer]. COMMON(diag)>Clear memory

4.

Read the DTC of [Immobilizer] using the Subaru Select Monitor. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC B1410 displayed? (Current malfunction)

2

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  It is possible that the surrounding radio wave environment was poor.

2. CHECK IGNITION KEY.
1.

Prepare a spare ignition key that is already registered.

2.

Insert the ignition key into the ignition switch, and then turn the ignition switch to ON.

3.

Read the DTC of [Immobilizer] using the Subaru Select Monitor. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC B1410 displayed? (Current malfunction)

3

Malfunction occurred in ignition key. Or the key has not been registered.

3. CHECK DTC.

Read the DTC of [Immobilizer] using the Subaru Select Monitor. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC B1411 displayed? (Current malfunction)

Perform the diagnosis of DTC B1411. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1411 IMMOBILIZER ANTENNA

4

4. CHECK IMMOBILIZER ANTENNA.
1.

Insert the ignition key into the ignition switch, and then turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, perform the clear memory of [Immobilizer]. COMMON(diag)>Clear memory

3.

Read the DTC of [Immobilizer] using the Subaru Select Monitor. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC B1410 displayed? (Current malfunction)

Replace the immobilizer CM. SECURITY AND LOCKS>Immobilizer Control Module

Malfunction occurred in the immobilizer antenna, ignition key or immobilizer CM.

IMMOBILIZER (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B1411 IMMOBILIZER ANTENNA
1. OTHER THAN FOR C5 MODEL

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

Received an immobilizer antenna malfunction signal during unit collation

Trouble symptom:

- Engine will not start.

- The security indicator illuminates.

Wiring diagram:

Immobilizer system WIRING SYSTEM>Immobilizer System>WIRING DIAGRAM

When the body integrated unit is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. CHECK FUSE.
no

Perform the instructed procedures.

yes
2. CHECK DATA MONITOR.
no

Perform the instructed procedures.

yes
3. CHECK IMMOBILIZER ANTENNA UNIT.
yes

Perform the instructed procedures.

no

4

4. CHECK IMMOBILIZER ANTENNA COMMUNICATION CIRCUIT (OPEN CIRCUIT).
yes

Perform the instructed procedures.

no

Perform the instructed procedures.

1. CHECK FUSE.
1.

Turn the ignition switch to OFF.

2.

Check the fuse.

Is the check result OK?

2

Replace the fuse. If the fuse blows out easily, repair the short circuit to power supply in harness between the battery and body integrated unit.

2. CHECK DATA MONITOR.
1.

Turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, check the following items in the [Data monitor] of [Body Control]. BODY CONTROL(DIAGNOSTICS)>Data Monitor

- BATT voltage (control)

Is the display 10 V or more?

3

Check the power supply circuit for body integrated unit.

3. CHECK IMMOBILIZER ANTENNA UNIT.
1.

Turn the ignition switch to OFF.

2.

Disconnect the connector from immobilizer antenna.

3.

Using a tester, measure the resistance between the immobilizer antenna connector terminals.

Connector & terminal

No. 1 — No. 5:

Is the resistance less than 8 Ω?

Replace the immobilizer antenna. SECURITY AND LOCKS>Immobilizer Antenna

4

4. CHECK IMMOBILIZER ANTENNA COMMUNICATION CIRCUIT (OPEN CIRCUIT).
1.

Disconnect the connector from body integrated unit.

2.

Measure the resistance between the body integrated unit connector and immobilizer antenna connector.

Connector & terminal

(i171) No. 3 — (i60) No. 1:

(i171) No. 4 — (i60) No. 5:

Is the resistance less than 10 Ω?

Replace the body integrated unit. SECURITY AND LOCKS>Body Integrated Unit

Repair or replace the open circuit of harness between the body integrated unit connector and immobilizer antenna connector.

2. C5 MODEL

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

Immobilizer antenna is faulty.

Trouble symptom:

- Engine will not start.

- The security indicator illuminates.

Wiring diagram:

Immobilizer system WIRING SYSTEM>Immobilizer System>WIRING DIAGRAM

When the immobilizer CM is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. CHECK FUSE.
no

Perform the instructed procedures.

yes
2. CHECK DATA MONITOR.
no

Perform the instructed procedures.

yes
3. CHECK IMMOBILIZER ANTENNA UNIT.
yes

Perform the instructed procedures.

no

4

4. CHECK IMMOBILIZER ANTENNA COMMUNICATION CIRCUIT (OPEN CIRCUIT).
yes

Perform the instructed procedures.

no

Perform the instructed procedures.

1. CHECK FUSE.
1.

Turn the ignition switch to OFF.

2.

Check the fuse.

Is the check result OK?

2

Replace the fuse. If the fuse blows out easily, repair the short circuit to power supply in harness between the battery and immobilizer CM.

2. CHECK DATA MONITOR.
1.

Turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, check the following items in the [Data monitor] of [Immobilizer]. IMMOBILIZER (DIAGNOSTICS)>Data Monitor

- BATT voltage

Is the display 10 V or more?

3

Check the power supply circuit of immobilizer CM.

3. CHECK IMMOBILIZER ANTENNA UNIT.
1.

Turn the ignition switch to OFF.

2.

Disconnect the connector from immobilizer antenna.

3.

Using a tester, measure the resistance between the immobilizer antenna connector terminals.

Connector & terminal

No. 1 — No. 5:

Is the resistance less than 8 Ω?

Replace the immobilizer antenna. SECURITY AND LOCKS>Immobilizer Antenna

4

4. CHECK IMMOBILIZER ANTENNA COMMUNICATION CIRCUIT (OPEN CIRCUIT).
1.

Disconnect the immobilizer CM connector.

2.

Measure the resistance between immobilizer CM connector and immobilizer antenna connector.

Connector & terminal

(i34) No. 4 — (i60) No. 1:

(i34) No. 15 — (i60) No. 5:

Is the resistance less than 10 Ω?

Replace the immobilizer CM. SECURITY AND LOCKS>Immobilizer Control Module

Repair the open circuit of harness between the immobilizer CM connector and immobilizer antenna connector.

IMMOBILIZER (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B1412 IMMOBILIZER CONTROL MODULE CAN REGISTER STUCK

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

- Defective immobilizer CM

- Failed to access the ROM of immobilizer CM

Trouble symptom:

- The security indicator does not blink after the ignition key is turned to OFF.

- The security indicator remains off.

When the immobilizer CM is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. CHECK DTC.
1.

Disconnect the ground terminal from battery sensor.REPAIR CONTENTS>NOTE > BATTERY

2.

Wait for at least 10 seconds.

3.

Connect the ground terminal to battery sensor.REPAIR CONTENTS>NOTE > BATTERY

4.

Turn the ignition switch to ON.

5.

Using the Subaru Select Monitor, perform the clear memory of [Immobilizer]. COMMON(diag)>Clear memory

6.

Read the DTC of [Immobilizer] using the Subaru Select Monitor. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC B1412 displayed? (Current malfunction)

2

Currently, it is normal.

2. CHECK DTC.
1.

Turn the ignition switch to OFF.

2.

Disconnect the ground terminal from battery sensor.REPAIR CONTENTS>NOTE > BATTERY

3.

Wait for at least 10 seconds.

4.

Connect the ground terminal to battery sensor.REPAIR CONTENTS>NOTE > BATTERY

5.

Turn the ignition switch to ON.

6.

Using the Subaru Select Monitor, perform the clear memory of [Immobilizer]. COMMON(diag)>Clear memory

7.

Read the DTC of [Immobilizer] using the Subaru Select Monitor. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC B1412 displayed? (Current malfunction)

3

Currently, it is normal.

3. CHECK DTC.
1.

Turn the ignition switch to OFF.

2.

Disconnect the ground terminal from battery sensor.REPAIR CONTENTS>NOTE > BATTERY

3.

Wait for at least 10 seconds.

4.

Connect the ground terminal to battery sensor.REPAIR CONTENTS>NOTE > BATTERY

5.

Turn the ignition switch to ON.

6.

Using the Subaru Select Monitor, perform the clear memory of [Immobilizer]. COMMON(diag)>Clear memory

7.

Read the DTC of [Immobilizer] using the Subaru Select Monitor. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC B1412 displayed? (Current malfunction)

Replace the immobilizer CM. SECURITY AND LOCKS>Immobilizer Control Module

Currently, it is normal.

IMMOBILIZER (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B1413 IMMOBILIZER CONTROL MODULE BATTERY POWER SUPPLY FAILURE

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

Battery voltage for the immobilizer CM was outside the specification for a certain period of time.

Trouble symptom:

The security indicator does not blink after the ignition key is turned to OFF.

Wiring diagram:

Immobilizer system WIRING SYSTEM>Immobilizer System>WIRING DIAGRAM

When the immobilizer CM is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. CHECK FUSE.
1.

Turn the ignition switch to OFF.

2.

Check the fuse.

Is the check result OK?

2

Replace the fuse. If the fuse blows out easily, repair the short circuit to power supply in harness between the battery and immobilizer CM.

2. CHECK DATA MONITOR.
1.

Turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, check the following items in the [Data monitor] of [Immobilizer]. IMMOBILIZER (DIAGNOSTICS)>Data Monitor

- BATT voltage

Is the display 10 V or more?

3

5

3. CHECK DATA MONITOR.
1.

Turn the ignition switch to OFF.

2.

Disconnect the ground terminal from battery sensor.REPAIR CONTENTS>NOTE > BATTERY

3.

Wait for at least 10 seconds.

4.

Connect the ground terminal to battery sensor.REPAIR CONTENTS>NOTE > BATTERY

5.

Turn the ignition switch to ON.

6.

Using the Subaru Select Monitor, check the following items in the [Data monitor] of [Immobilizer]. IMMOBILIZER (DIAGNOSTICS)>Data Monitor

- BATT voltage

Is the display 10 V or more?

4

5

4. CHECK DTC.

Read the DTC of [Immobilizer] using the Subaru Select Monitor. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC B1413 displayed? (Current malfunction)

Replace the immobilizer CM. SECURITY AND LOCKS>Immobilizer Control Module

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

5. CHECK IMMOBILIZER CM POWER SUPPLY CIRCUIT.
1.

Turn the ignition switch to OFF.

2.

Disconnect the connector from immobilizer CM.

3.

Measure the voltage between immobilizer CM connector and chassis ground.

Connector & terminal

(i34) No. 1 (+) — Chassis ground (−):

Is the voltage 10 V or more?

6

Repair the open circuit of harness between the immobilizer CM and fuse.

6. CHECK IMMOBILIZER CM GROUND CIRCUIT.

Measure the resistance between immobilizer CM connector and chassis ground.

Connector & terminal

(i34) No. 5 (+) — Chassis ground:

Is the resistance less than 10 Ω?

Replace the immobilizer CM. SECURITY AND LOCKS>Immobilizer Control Module

Repair the open circuit of harness between the immobilizer CM connector and chassis ground.

IMMOBILIZER (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B1414 IMMOBILIZER CONTROL MODULE NON-VOLATILE MEMORY

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

- Defective immobilizer CM

- Failed to access the ROM in immobilizer CM.

Trouble symptom:

Engine will not start.

When the immobilizer CM is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. CHECK DTC.
1.

Disconnect the ground terminal from battery sensor.REPAIR CONTENTS>NOTE > BATTERY

2.

Wait for at least 10 seconds.

3.

Connect the ground terminal to battery sensor.REPAIR CONTENTS>NOTE > BATTERY

4.

Turn the ignition switch to ON.

5.

Read the DTC of [Immobilizer] using the Subaru Select Monitor. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC B1414 displayed? (Current malfunction)

2

The system has returned to a normal condition at this time. Finish the diagnosis.

2. CHECK DTC.
1.

Using the Subaru Select Monitor, perform the clear memory of [Immobilizer]. COMMON(diag)>Clear memory

2.

Turn the ignition switch to OFF.

3.

Disconnect the ground terminal from battery sensor.REPAIR CONTENTS>NOTE > BATTERY

4.

Wait for at least 10 seconds.

5.

Connect the ground terminal to battery sensor.REPAIR CONTENTS>NOTE > BATTERY

6.

Turn the ignition switch to ON.

7.

Read the DTC of [Immobilizer] using the Subaru Select Monitor. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC B1414 displayed? (Current malfunction)

Replace the immobilizer CM. SECURITY AND LOCKS>Immobilizer Control Module

The system has returned to a normal condition at this time. Finish the diagnosis.

IMMOBILIZER (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B1571 REFERENCE CODE INCOMPATIBILITY (IMMOBILIZER CM TO ECM)
1. OTHER THAN FOR C5 MODEL

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

Reference code incompatibility between body integrated unit and ECM

Trouble symptom:

- Engine will not start.

- The security indicator illuminates.

When the body integrated unit or ECM is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. CONFIRM NUMBER OF REGISTERED IMMOBILIZER KEY.
no

4

yes
2. CHECK GROUNDING POINT.
no

3

yes
3. PERFORM IMMOBILIZER SYSTEM REGISTRATION.
yes

Perform the instructed procedures.

no

4

4. PERFORM ECM REGISTRATION.
yes

Perform the instructed procedures.

no

5

5. CHECK DTC.
yes

Perform the instructed procedures.

no

6

6. PERFORM ECM REGISTRATION.
yes

Perform the instructed procedures.

no

Perform the instructed procedures.

1. CONFIRM NUMBER OF REGISTERED IMMOBILIZER KEY.

Confirm the number of registered immobilizer key. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is the number of registration 0?

2

4

2. CHECK GROUNDING POINT.

Check the grounding point of the engine ground and chassis ground.

Is there any looseness? Are there any foreign matters caught on the ground or contact surface? Are there any oil-soiled areas?

Remove the foreign matters, and tighten to the specified torque. Then start the engine, and check that the fault was removed. Read the DTC IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC), and when DTC B1571 is still displayed, 3

3

3. PERFORM IMMOBILIZER SYSTEM REGISTRATION.

Register the immobilizer system. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is registration complete?

Finish the diagnosis.

4

4. PERFORM ECM REGISTRATION.

Perform ECM registration. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is registration complete?

Finish the diagnosis.

5

5. CHECK DTC.
1.

Turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, perform the clear memory of [Engine]. COMMON(diag)>Clear memory

3.

Read the DTC of [Engine] using the Subaru Select Monitor. ENGINE (DIAGNOSTICS)(H4DO)>Diagnostic Trouble Code (DTC)

Are DTCs other than DTC B1571 displayed? (Current malfunction)

Perform the diagnosis for DTC other than DTC B1571.

6

6. PERFORM ECM REGISTRATION.
1.

Replace the ECM. FUEL INJECTION (FUEL SYSTEMS)(H4DO)>Engine Control Module (ECM)

2.

Perform ECM registration. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is registration complete?

Finish the diagnosis.

Refer to “Correspondence table when registration is not possible” in the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume. If the registration still does not work properly, replace the body integrated unit. SECURITY AND LOCKS>Body Integrated Unit

2. C5 MODEL

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

Reference code incompatibility between immobilizer CM and ECM

Trouble symptom:

- Engine will not start.

- The security indicator illuminates.

When the immobilizer CM is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. CONFIRM NUMBER OF REGISTERED IMMOBILIZER KEY.
yes

4

no

2

2. CHECK GROUNDING POINT.
no

3

yes
3. PERFORM IMMOBILIZER SYSTEM REGISTRATION.
yes

Perform the instructed procedures.

no

4

4. PERFORM ECM REGISTRATION.
yes

Perform the instructed procedures.

no

5

5. CHECK DTC.
yes

Perform the instructed procedures.

no

6

6. PERFORM ECM REGISTRATION.
yes

Perform the instructed procedures.

no

Perform the instructed procedures.

1. CONFIRM NUMBER OF REGISTERED IMMOBILIZER KEY.

Confirm the number of registered immobilizer key. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is the number of registration 0?

4

2

2. CHECK GROUNDING POINT.

Check the grounding point of the engine ground and chassis ground.

Is there any looseness? Are there any foreign matters caught on the ground or contact surface? Are there any oil-soiled areas?

Remove the foreign matters, and tighten to the specified torque. Then start the engine, and check that the fault was removed. Read the DTC IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC), and when DTC B1571 is still displayed, 3

3

3. PERFORM IMMOBILIZER SYSTEM REGISTRATION.

Register the immobilizer system. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is registration complete?

Finish the diagnosis.

4

4. PERFORM ECM REGISTRATION.

Perform ECM registration. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is registration complete?

Finish the diagnosis.

5

5. CHECK DTC.
1.

Turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, perform the clear memory of [Engine]. COMMON(diag)>Clear memory

3.

Read the DTC of [Engine] using the Subaru Select Monitor. ENGINE (DIAGNOSTICS)(H4DO)>Diagnostic Trouble Code (DTC)

Are DTCs other than DTC B1571 displayed? (Current malfunction)

Perform the diagnosis for DTC other than DTC B1571.

6

6. PERFORM ECM REGISTRATION.
1.

Replace the ECM. FUEL INJECTION (FUEL SYSTEMS)(H4DO)>Engine Control Module (ECM)

2.

Perform ECM registration. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is registration complete?

Finish the diagnosis.

Refer to “Correspondence table when registration is not possible” in the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume. If the registration still does not work properly, replace the immobilizer CM. SECURITY AND LOCKS>Body Integrated Unit

IMMOBILIZER (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B1572 IMM CIRCUIT EXCEPT ANTENNA CIRCUIT
1. OTHER THAN FOR C5 MODEL

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

Communication failure between body integrated unit and ECM

Trouble symptom:

- Engine will not start.

- The security indicator illuminates.

Wiring diagram:

Immobilizer system WIRING SYSTEM>Immobilizer System>WIRING DIAGRAM

When the body integrated unit or ECM is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. CHECK DTC.
yes

Perform the instructed procedures.

no

2

2. CHECK GROUNDING POINT.
no

3

yes
3. CHECK FUSE.
no

Perform the instructed procedures.

yes
4. CHECK DATA MONITOR.
no

6

yes
5. CHECK DATA MONITOR.
yes

8

no

7

6. CHECK BODY INTEGRATED UNIT BATTERY POWER SUPPLY CIRCUIT.
no

Perform the instructed procedures.

yes
7. CHECK BODY INTEGRATED UNIT IGN POWER SUPPLY CIRCUIT.
no

Perform the instructed procedures.

yes
8. CHECK BODY INTEGRATED UNIT GROUND CIRCUIT (OPEN CIRCUIT).
no

Perform the instructed procedures.

yes
9. CHECK GROUND CIRCUIT FOR ECM (OPEN CIRCUIT).
no

Perform the instructed procedures.

yes
10. CHECK HARNESS (OPEN CIRCUIT) BETWEEN BODY INTEGRATED UNIT AND ECM.
no

Perform the instructed procedures.

yes
11. CHECK COMMUNICATION LINE HARNESS (SHORT CIRCUIT TO POWER SUPPLY).
yes

Perform the instructed procedures.

no

12

12. CHECK COMMUNICATION CIRCUIT HARNESS (SHORT CIRCUIT TO GROUND).
yes

Perform the instructed procedures.

no

13

13. CHECK ECM.
yes

Perform the instructed procedures.

no

Perform the instructed procedures.

1. CHECK DTC.
1.

Turn the ignition switch to ON.

2.

Read the DTC of [Body Control] using the Subaru Select Monitor. BODY CONTROL(DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC for [Body Control] displayed? (Current malfunction)

Perform the diagnosis for the displayed DTCs. BODY CONTROL(DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

2

2. CHECK GROUNDING POINT.

Check the grounding point of the engine ground and chassis ground.

Is there any looseness? Are there any foreign matters caught on the ground or contact surface? Are there any oil-soiled areas?

Remove the foreign matters, and tighten to the specified torque. Then start the engine, and check that the fault was removed. Read the DTC IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC), and when DTC B1572 is still displayed, 3

3

3. CHECK FUSE.
1.

Turn the ignition switch to OFF.

2.

Check the fuse.

Is the check result OK?

4

Replace the fuse. If the fuse blows out easily, repair the short circuit to power supply in harness between the battery and body integrated unit.

4. CHECK DATA MONITOR.
1.

Turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, check the following items in the [Data monitor] of [Body Control]. BODY CONTROL(DIAGNOSTICS)>Data Monitor

- BATT voltage (control)

Is the display 10 V or more?

5

6

5. CHECK DATA MONITOR.

Using the Subaru Select Monitor, check the following items in the [Data monitor] of [Body Control]. BODY CONTROL(DIAGNOSTICS)>Data Monitor

- IGN voltage

Is the display 10 V or more?

8

7

6. CHECK BODY INTEGRATED UNIT BATTERY POWER SUPPLY CIRCUIT.
1.

Turn the ignition switch to OFF.

2.

Disconnect the body integrated unit connector.

3.

Measure the voltage between body integrated unit connector and chassis ground.

Connector & terminal

(B281) No. 7 (+) — Chassis ground (−):

(B280) No. 1 (+) — Chassis ground (−):

Is the voltage 10 V or more?

7

Repair the open or short circuit of harness between the body integrated unit connector and fuse.

7. CHECK BODY INTEGRATED UNIT IGN POWER SUPPLY CIRCUIT.
1.

Turn the ignition switch to ON.

2.

Measure the voltage between F/B fuse No. 5 and chassis ground.

Connector & terminal

F/B fuse No. 5 (+) — Chassis ground (−):

Is the voltage 10 V or more?

8

Repair the open or short circuit of harness between the body integrated unit connector and ignition switch.

8. CHECK BODY INTEGRATED UNIT GROUND CIRCUIT (OPEN CIRCUIT).
1.

Turn the ignition switch to OFF.

2.

Measure the resistance between body integrated unit connector and chassis ground.

Connector & terminal

(B287) No. 1 — Chassis ground:

(i84) No. 4 — Chassis ground:

Is the resistance less than 10 Ω?

9

Repair the open circuit of harness between the body integrated unit connector and chassis ground.

9. CHECK GROUND CIRCUIT FOR ECM (OPEN CIRCUIT).
1.

Disconnect the ECM connector.

2.

Measure the resistance between the ECM connector and engine ground.

Connector & terminal

(B134) No. 69 — Engine ground:

(B134) No. 70 — Engine ground:

(B134) No. 72 — Engine ground:

(B134) No. 71 — Engine ground:

Is the resistance less than 10 Ω?

10

Repair the open circuit in harness between ECM connector and chassis ground.

10. CHECK HARNESS (OPEN CIRCUIT) BETWEEN BODY INTEGRATED UNIT AND ECM.
1.

Disconnect the ECM connector.

2.

Measure the resistance between the body integrated unit connector and ECM.

Connector & terminal

(B281) No. 14 — (B134) No. 6:

Is the resistance less than 10 Ω?

11

Repair the open circuit of harness between the body integrated unit connector and ECM.

11. CHECK COMMUNICATION LINE HARNESS (SHORT CIRCUIT TO POWER SUPPLY).
1.

Disconnect the body integrated unit connector.

2.

Turn the ignition switch to ON.

3.

Measure the voltage between body integrated unit connector and chassis ground.

Connector & terminal

(B281) No. 14 (+) — Chassis ground (−):

Is the voltage 6 V or more?

Repair the short circuit to power supply in harness between body integrated unit connector and ECM connector.

12

12. CHECK COMMUNICATION CIRCUIT HARNESS (SHORT CIRCUIT TO GROUND).
1.

Turn the ignition switch to OFF.

2.

Measure the resistance between the body integrated unit connector and each ground.

Connector & terminal

(B281) No. 14 — Chassis ground:

(B281) No. 14 — Engine ground:

Is the resistance less than 10 Ω?

Repair the ground short circuit of harness between body integrated unit connector and ECM connector.

13

13. CHECK ECM.
1.

Replace the ECM. (Do not perform ECM registration.) FUEL INJECTION (FUEL SYSTEMS)(H4DO)>Engine Control Module (ECM)

2.

Connect all connectors.

3.

Turn the ignition switch to ON.

4.

Wait for 5 seconds.

5.

Read the DTC of [Engine Control System] using the Subaru Select Monitor. ENGINE (DIAGNOSTICS)(H4DO)>Diagnostic Trouble Code (DTC)

Is DTC B1572 displayed? (Current malfunction)

Replace the body integrated unit. SECURITY AND LOCKS>Body Integrated Unit

Register the ECM. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

2. C5 MODEL

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

Communication failure between immobilizer CM and ECM

Trouble symptom:

- Engine will not start.

- The security indicator illuminates.

Wiring diagram:

Immobilizer system WIRING SYSTEM>Immobilizer System>WIRING DIAGRAM

When the immobilizer CM or ECM is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. CHECK DTC.
yes

Perform the instructed procedures.

no

2

2. CHECK GROUNDING POINT.
no

3

yes
3. CHECK FUSE.
no

Perform the instructed procedures.

yes
4. CHECK DATA MONITOR.
yes

7

no

5

5. CHECK GROUND CIRCUIT FOR ECM (OPEN CIRCUIT).
no

Perform the instructed procedures.

yes
6. CHECK IMMOBILIZER CM BATTERY POWER SUPPLY CIRCUIT.
no

Perform the instructed procedures.

yes
7. CHECK IMMOBILIZER CM IGN POWER SUPPLY CIRCUIT.
no

Perform the instructed procedures.

yes
8. CHECK IMMOBILIZER CM GROUND CIRCUIT (OPEN CIRCUIT).
no

Perform the instructed procedures.

yes
9. CHECK HARNESS BETWEEN IMMOBILIZER CM AND ECM (OPEN CIRCUIT).
no

Perform the instructed procedures.

yes
10. CHECK COMMUNICATION LINE HARNESS (SHORT CIRCUIT TO POWER SUPPLY).
yes

Perform the instructed procedures.

no

11

11. CHECK COMMUNICATION CIRCUIT HARNESS (SHORT CIRCUIT TO GROUND).
yes

Perform the instructed procedures.

no

12

12. CHECK ECM.
yes

Perform the instructed procedures.

no

Perform the instructed procedures.

1. CHECK DTC.
1.

Turn the ignition switch to ON.

2.

Read the DTC of [Immobilizer] using the Subaru Select Monitor. IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC for [Immobilizer] displayed? (Current malfunction)

Perform the diagnosis for the displayed DTCs.

2

2. CHECK GROUNDING POINT.

Check the grounding point of the engine ground and chassis ground.

Is there any looseness? Are there any foreign matters caught on the ground or contact surface? Are there any oil-soiled areas?

Remove the foreign matters, and tighten to the specified torque. Then start the engine, and check that the fault was removed. Read the DTC IMMOBILIZER (DIAGNOSTICS)>Diagnostic Trouble Code (DTC), and when DTC B1572 is still displayed, 3

3

3. CHECK FUSE.
1.

Turn the ignition switch to OFF.

2.

Check the fuse.

Is the check result OK?

4

Replace the fuse. If the fuse blows out easily, repair the short circuit to power supply in harness between the battery and immobilizer CM.

4. CHECK DATA MONITOR.
1.

Turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, check the following items in the [Data monitor] of [Immobilizer]. IMMOBILIZER (DIAGNOSTICS)>Data Monitor

- Battery Voltage

Is the display 10 V or more?

7

5

5. CHECK GROUND CIRCUIT FOR ECM (OPEN CIRCUIT).
1.

Disconnect the ECM connector.

2.

Measure the resistance between the ECM connector and engine ground.

Connector & terminal

(B134) No. 69 — Engine ground:

(B134) No. 70 — Engine ground:

(B134) No. 72 — Engine ground:

(B134) No. 71 — Engine ground:

Is the resistance less than 10 Ω?

6

Repair the open circuit in harness between ECM connector and chassis ground.

6. CHECK IMMOBILIZER CM BATTERY POWER SUPPLY CIRCUIT.
1.

Turn the ignition switch to OFF.

2.

Disconnect the immobilizer CM connector.

3.

Measure the voltage between immobilizer CM connector and chassis ground.

Connector & terminal

(i34) No. 1 (+) — Chassis ground (−):

Is the voltage 10 V or more?

7

Repair the open or short circuit of harness between the immobilizer CM connector and fuse.

7. CHECK IMMOBILIZER CM IGN POWER SUPPLY CIRCUIT.
1.

Turn the ignition switch to ON.

2.

Measure the voltage between immobilizer CM connector and chassis ground.

Connector & terminal

(i34) No. 2 (+) — Chassis ground (−):

Is the voltage 10 V or more?

8

Repair the open or short circuit of harness between the immobilizer CM connector and ignition switch.

8. CHECK IMMOBILIZER CM GROUND CIRCUIT (OPEN CIRCUIT).
1.

Turn the ignition switch to OFF.

2.

Measure the resistance between immobilizer CM connector and chassis ground.

Connector & terminal

(i34) No. 5 — Chassis ground:

Is the resistance less than 10 Ω?

9

Repair the open circuit of harness between the immobilizer CM connector and chassis ground.

9. CHECK HARNESS BETWEEN IMMOBILIZER CM AND ECM (OPEN CIRCUIT).

Measure the resistance between immobilizer CM connector and ECM connector.

Connector & terminal

(i34) No. 12 — (B134) No. 6:

Is the resistance less than 10 Ω?

10

Repair the open circuit of harness between the immobilizer CM connector and ECM.

10. CHECK COMMUNICATION LINE HARNESS (SHORT CIRCUIT TO POWER SUPPLY).
1.

Turn the ignition switch to ON.

2.

Measure the voltage between immobilizer CM connector and chassis ground.

Connector & terminal

(i34) No. 12 (+) — Chassis ground (−):

Is the voltage 6 V or more?

Repair the short circuit to power supply in harness between immobilizer CM connector and ECM connector.

11

11. CHECK COMMUNICATION CIRCUIT HARNESS (SHORT CIRCUIT TO GROUND).
1.

Turn the ignition switch to OFF.

2.

Measure the resistance between immobilizer CM connector and each ground.

Connector & terminal

(i34) No. 12 — Chassis ground:

(I34) No. 12 — Engine ground:

Is the resistance less than 10 Ω?

Repair the short circuit to ground in harness between immobilizer CM connector and ECM connector.

12

12. CHECK ECM.
1.

Replace the ECM. (Do not perform ECM registration.) FUEL INJECTION (FUEL SYSTEMS)(H4DO)>Engine Control Module (ECM)

2.

Connect all connectors.

3.

Turn the ignition switch to ON.

4.

Wait for 5 seconds.

5.

Read the DTC of [Engine Control System] using the Subaru Select Monitor. ENGINE (DIAGNOSTICS)(H4DO)>Diagnostic Trouble Code (DTC)

Is DTC B1572 displayed? (Current malfunction)

Replace the immobilizer CM. SECURITY AND LOCKS>Immobilizer Control Module

Malfunction occurred in ECM. Register the ECM. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

IMMOBILIZER (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B1576 EGI CONTROL MODULE EEPROM

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

- ECM malfunctioning

- Failed to access ROM in ECM during key registration.

Trouble symptom:

- Engine will not start.

- The security indicator illuminates.

When the ECM is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. PERFORM ECM REGISTRATION.

Perform ECM registration. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is registration complete?

Finish the diagnosis.

2

2. PERFORM ECM REGISTRATION.

Perform ECM registration. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is registration complete?

Finish the diagnosis.

3

3. PERFORM ECM REGISTRATION.

Perform ECM registration. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is registration complete?

Finish the diagnosis.

Refer to “Correspondence table when registration is not possible” in the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume. If the registration still does not work properly, replace the ECM. FUEL INJECTION (FUEL SYSTEMS)(H4DO)>Engine Control Module (ECM)

IMMOBILIZER (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B1577 IMM CONTROL MODULE EEPROM

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

- Defective body integrated unit or immobilizer CM

- Failed to access ROM in the body integrated unit or the immobilizer CM

Trouble symptom:

- Engine will not start.

- The security indicator illuminates.

When the body integrated unit or immobilizer CM is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. PERFORM ECM REGISTRATION.

Perform ECM registration. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is registration complete?

Finish the diagnosis.

2

2. PERFORM ECM REGISTRATION.
1.

Turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, perform the clear memory of [Engine]. COMMON(diag)>Clear memory

3.

Perform ECM registration. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

Is registration complete?

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

- Refer to “Correspondence table when registration is not possible” in the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume. If the registration still does not work properly, replace the following parts.

  - Body integrated unit (except for C5 model) SECURITY AND LOCKS>Body Integrated Unit

  - Immobilizer CM (C5 model) SECURITY AND LOCKS>Immobilizer Control Module

IMMOBILIZER (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B1578 METER

Diagnosis start condition:

- Battery voltage is 10 V or more.

- The remote engine starter was not used to start the engine.

DTC detecting condition:

Reference code incompatibility between combination meter and body integrated unit or communication failure between body integrated unit and ECM

Trouble symptom:

- Engine will not start.

- The security indicator illuminates.

1. CHECK DTC.
1.

Turn the ignition switch to ON.

2.

Read the DTC of [Body Control] using the Subaru Select Monitor. BODY CONTROL(DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC B1401, B1407, or B1408 displayed? (Current malfunction)

Perform the diagnosis for the displayed DTC B1401, B1407 or B1408.

IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1401 METER COLLATION

IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1407 MET COMMUNICATION

IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1408 METER NON-VOLATILE MEMORY

Perform the diagnosis of DTC B1572.

IMMOBILIZER (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B1572 IMM CIRCUIT EXCEPT ANTENNA CIRCUIT

IMMOBILIZER (DIAGNOSTICS) > Diagnostics with Phenomenon
INSPECTION
1. CHECK KEY SWITCH CIRCUIT

Trouble symptom:

Engine does not start.

Trouble causes:

- Key warning switch circuit malfunction

- Key warning switch malfunction

Wiring diagram:

Immobilizer system WIRING SYSTEM>Immobilizer System>WIRING DIAGRAM

When the body integrated unit (except for C5 model) or the immobilizer CM (C5 model) is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1. CHECK POWER SUPPLY CIRCUIT.
no

Perform the instructed procedures.

yes
2. CHECK KEY WARNING SWITCH.
no

Perform the instructed procedures.

yes
3. CHECK KEY WARNING SWITCH.
no

Perform the instructed procedures.

yes
4. CHECK DATA MONITOR.
yes

Perform the instructed procedures.

no

5

5. CHECK HARNESS BETWEEN KEY WARNING SWITCH AND BODY INTEGRATED UNIT (EXCEPT FOR C5 MODEL) OR IMMOBILIZER CM (C5 MODEL).
yes

Perform the instructed procedures.

no

Perform the instructed procedures.

1. CHECK POWER SUPPLY CIRCUIT.
1.

Disconnect the connector from key warning switch.

2.

Measure the voltage between key warning switch connector terminal and chassis ground.

Connector & terminal

(i63) No. 1 (+) — Chassis ground (–):

Is the voltage 10 V or more?

2

Check the harness for an open or short between the key warning switch and fuse.

2. CHECK KEY WARNING SWITCH.
1.

Insert the ignition key in the ignition switch. (OFF or ACC)

2.

Measure the resistance between key warning switch connector terminals.

Terminals

No. 1 — No. 2:

Is the resistance less than 1 Ω?

3

Replace the key warning switch. SECURITY AND LOCKS>Key Lock Cylinders

3. CHECK KEY WARNING SWITCH.
1.

Remove the ignition key from ignition switch.

2.

Measure the resistance between key warning switch connector terminals.

Terminals

No. 1 — No. 2:

Is the resistance 1 MΩ or more?

4

Replace the key warning switch. SECURITY AND LOCKS>Key Lock Cylinders

4. CHECK DATA MONITOR.
1.

Turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, check the following items under the [Data monitor] of [Body Control] or [Immobilizer]. BODY CONTROL(DIAGNOSTICS)>Data Monitor IMMOBILIZER (DIAGNOSTICS)>Data Monitor

- Body Control

  - key-lock warning SW

- Immobilizer

  - key-lock warning SW Input

Is [ON] displayed?

Replace the body integrated unit (except for C5 model) SECURITY AND LOCKS>Body Integrated Unit or the immobilizer CM (C5 model) SECURITY AND LOCKS>Immobilizer Control Module.

5

5. CHECK HARNESS BETWEEN KEY WARNING SWITCH AND BODY INTEGRATED UNIT (EXCEPT FOR C5 MODEL) OR IMMOBILIZER CM (C5 MODEL).
1.

Disconnect the connector from the body integrated unit (except for C5 model) or the immobilizer CM (C5 model).

2.

Measure the resistance between key warning switch connector terminal and body integrated unit (except for C5 model) or immobilizer CM (C5 model) connector terminal.

Connector & terminal

Body integrated unit (except for C5 model)

(i63) No. 2 — (i84) No. 1:

Immobilizer CM (C5 model)

(i63) No. 2 — (i34) No. 3:

Is the resistance less than 10 Ω?

Replace the body integrated unit (except for C5 model) SECURITY AND LOCKS>Body Integrated Unit or the immobilizer CM (C5 model) SECURITY AND LOCKS>Immobilizer Control Module.

Repair harness between key warning switch and body integrated unit (except for C5 model) or immobilizer CM (C5 model).