KEYLESS ENTRY(DIAGNOSTICS)
KLE(diag)

KEYLESS ENTRY(DIAGNOSTICS) > Basic Diagnostic Procedure
PROCEDURE

1. PERFORM CUSTOMER INTERVIEW.

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

Did you interview the customer?

2

Perform the interview, and 2

2. BASIC INSPECTION.

Perform basic inspection. KEYLESS ENTRY(DIAGNOSTICS) >General Description>INSPECTION

Is the check result OK?

3

Repair the faulty part found in basic inspection, and 3

3. CHECK SUBARU SELECT MONITOR COMMUNICATION.
1.

Turn the ignition switch to OFF.

2.

Connect the Subaru Select Monitor to data link connector. COMMON(diag)>Data Link Connector

3.

Turn the ignition switch to ON and run the Subaru Select Monitor.

4.

Select [Keyless Entry].

For detailed operation procedures, refer to “Help” of application.

Is communication possible?

4

Check the communication circuit. KEYLESS ENTRY(DIAGNOSTICS) >Diagnostic Procedure for Subaru Select Monitor Communication

4. CHECK DTC.

Read the DTC of [Keyless Entry] using the Subaru Select Monitor. KEYLESS ENTRY(DIAGNOSTICS) >Diagnostic Trouble Code (DTC)

Are any DTCs displayed? (Current malfunction)

Record the DTC, time stamp and freeze frame data, and 5

Keyless entry system is normal.

5. PERFORM DIAGNOSIS.
1.

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

2.

Repair or replace the cause of trouble.

3.

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

4.

Execute the inspection mode. KEYLESS ENTRY(DIAGNOSTICS) >Inspection Mode

5.

Read the DTC of [Keyless Entry] using the Subaru Select Monitor. KEYLESS ENTRY(DIAGNOSTICS) >Diagnostic Trouble Code (DTC)

Are any DTCs displayed? (Current malfunction)

Repeat step 5 until DTC is not shown.

Finish the diagnosis.

KEYLESS ENTRY(DIAGNOSTICS) > Check List for Interview
CHECK

Inspect the following items regarding the vehicle’s state.

Keyless Entry Check List for Interview Date of Vehicle Bring-in    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 surface 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 |

KEYLESS ENTRY(DIAGNOSTICS) > General Description
CAUTION
1. AIRBAG

When removing airbag related parts, refer to Cautions for Airbags. AIRBAG SYSTEM>General Description>CAUTION

2. KEYLESS ENTRY

When removing keyless entry-related components, refer to cautions in the security&lock section. SECURITY AND LOCKS>General Description>CAUTION

KEYLESS ENTRY(DIAGNOSTICS) > General Description
INSPECTION
1. BASIC INSPECTION

Before performing diagnosis, check the following items which might affect keyless entry related problems.

1.

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

2.

Check the fuse condition. SECURITY AND LOCKS>Relay and Fuse

Make sure that ampere of the fuse is setting value, and it is not blown out.

3.

Check the connecting condition of harness and harness connector.

KEYLESS ENTRY(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.

KEYLESS ENTRY(DIAGNOSTICS) > General Description
SYSTEM BLOCK DIAGRAM
KEYLESS ENTRY(DIAGNOSTICS) > Electrical Component Location
LOCATION

(1) | Data link connector | (2) | Body integrated unit | (3) | TPMS & keyless entry CM or the keyless entry CM

KEYLESS ENTRY(DIAGNOSTICS) > Control Module I/O Signal
ELECTRICAL SPECIFICATION

Terminal No. | Item | Measuring condition | Standard
(R221) or (R80) No. 1 | CAN-L | Digital signal; can not be measured | —
(R221) or (R80) No. 2 | CAN-H | Digital signal; can not be measured | —
(R221) or (R80) No. 3 | — | — | —
(R221) or (R80) No. 4 | — | — | —
(R221) or (R80) No. 5 | — | — | —
(R221) No. 6 ←→ Chassis ground | Ignition power supply | When ignition switch is ON | 9 — 16 V
(R80) No. 6 | — | — | —
(R221) or (R80) No. 7 ←→ Chassis ground | GND | Always | 1 Ω or less
(R221) or (R80) No. 8 | — | — | —
(R221) or (R80) No. 9 | — | — | —
(R221) or (R80) No. 10 | — | — | —
(R221) or (R80) No. 11 | — | — | —
(R221) or (R80) No. 12 ←→ Chassis ground | Battery power supply | Always | 9 — 16 V

KEYLESS ENTRY(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
B2771 | EEPROM PERFORMANCE | KEYLESS ENTRY(DIAGNOSTICS) >Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2771 EEPROM PERFORMANCE
B2772 | CAN COMMUNICATION (AUDIO) STUCK | KEYLESS ENTRY(DIAGNOSTICS) >Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2772 CONTROL MODULE COMMUNICATION STUCK
U0073 | CONTROL MODULE COMMUNICATION BUS OFF | KEYLESS ENTRY(DIAGNOSTICS) >Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0073 CONTROL MODULE COMMUNICATION BUS OFF
U0140 | LOST COMMUNICATION WITH BODY CONTROL MODULE | KEYLESS ENTRY(DIAGNOSTICS) >Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0140 LOST COMMUNICATION WITH BODY CONTROL MODULE
U0155 | LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE | KEYLESS ENTRY(DIAGNOSTICS) >Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0155 LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE
U0422 | INVALID DATA RECEIVED FROM BODY CONTROL MODULE | KEYLESS ENTRY(DIAGNOSTICS) >Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE

Diagnostic procedure:

1.

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

2.

Using the Subaru Select Monitor, read the DTC of [Keyless Entry] to check that there is no DTC displayed. KEYLESS ENTRY(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.

Using the Subaru Select Monitor, read the DTC of [Keyless Entry] to check that there is no DTC displayed. KEYLESS ENTRY(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.

KEYLESS ENTRY(DIAGNOSTICS) > Diagnostic Procedure for Subaru Select Monitor Communication
INSPECTION

Detecting condition:

- Defective harness

- Power supply circuit malfunction

- Defective TPMS & keyless entry CM or keyless entry CM

- Defective CAN communication circuit

- Defective Subaru Select Monitor

Trouble symptom:

Not communicable with Subaru Select Monitor.

Wiring diagram:

- Keyless entry system WIRING SYSTEM>Keyless Entry System

- CAN communication system WIRING SYSTEM>CAN Communication System>WIRING DIAGRAM

Before performing diagnosis, refer to “CAUTION” in “General Description”. KEYLESS ENTRY(DIAGNOSTICS) >General Description>CAUTION

1. CHECK POWER SUPPLY CIRCUIT.

Connect DST-i to data link connector.

Does DST-i turn ON?

4

2

2. CHECK POWER SUPPLY CIRCUIT.
1.

Turn the ignition switch to ON.

2.

Using the tester, measure the voltage between data link connector and chassis ground.

Connector & terminal

(i288) No. 8 (+) — Chassis ground (−):

(i288) No. 16 (+) — Chassis ground (−):

Is the voltage 10 V or more?

3

- Repair the power supply circuit.

- In this case, repair the following item:

  - Open or ground short circuit of harness between battery and data link connector

  - Blown out of fuse

3. CHECK HARNESS BETWEEN DATA LINK CONNECTOR AND CHASSIS GROUND (OPEN).
1.

Turn the ignition switch to OFF.

2.

Using the tester, measure the resistance between data link connector and chassis ground.

Connector & terminal

(i288) No. 4 — Chassis ground:

(i288) No. 5 — Chassis ground:

Is the resistance less than 5 Ω?

Check for poor contact of the data link connector, and repair a fault, if any. When no fault is found, 4

Repair the harness and connector.

4. CHECK SUBARU SELECT MONITOR.
1.

Connect the Subaru Select Monitor to a normal vehicle.

2.

Start the engine and establish communication between the Subaru Select Monitor and vehicle.

Is communication possible?

5

Use another Subaru Select Monitor because the CAN communication circuit of the Subaru Select Monitor is faulty.

5. CHECK LAN SYSTEM.

Perform the diagnosis for LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE

Is LAN system OK?

6

Perform the inspection according to the diagnosis for LAN system.

6. CHECK CONNECTOR.

Check TPMS & keyless entry CM connector or keyless entry CM connector, data link connector or intermediate connector for poor contact.

Is the connector OK?

7

Repair the connector.

7. CHECK FUSE.
1.

Turn the ignition switch to OFF.

2.

Remove a fuse from the fuse box.

3.

Check the fuse. SECURITY AND LOCKS>Relay and Fuse

Is the fuse OK?

8

Replace the fuse. If the replaced fuse blows out easily, repair the ground short circuit in harness between the TPMS & keyless entry CM or keyless entry CM and fuse.

8. CHECK POWER SUPPLY CIRCUIT FOR TPMS & KEYLESS ENTRY CM OR KEYLESS ENTRY CM CONNECTOR (OPEN CIRCUIT).
1.

Disconnect the TPMS & keyless entry CM or keyless entry CM connector.

2.

Turn the ignition switch to ON.

3.

Measure the voltage between the TPMS & keyless entry CM or the keyless entry CM connector and chassis ground.

Connector & terminal

Without TPMS

(R80) No. 12 (+) — Chassis ground (−):

With TPMS

(R221) No. 6 (+) — Chassis ground (−):

(R221) No. 12 (+) — Chassis ground (−):

Is the voltage 10 V or more?

9

Check for open or short circuit in the harness between the TPMS & keyless entry CM or keyless entry CM and fuses.

9. CHECK GROUND CIRCUIT FOR TPMS & KEYLESS ENTRY CM OR KEYLESS ENTRY CM (OPEN CIRCUIT).

Measure the resistance in harness between TPMS & keyless entry CM or keyless entry CM connector and chassis ground.

Connector & terminal

Without TPMS

(R80) No. 7 — Chassis ground:

With TPMS

(R221) No. 7 — Chassis ground:

Is the resistance less than 1 Ω?

Check the connection between the data link connector and Subaru Select Monitor.

Repair the harness for ground line.

KEYLESS ENTRY(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. KEYLESS ENTRY(DIAGNOSTICS) >Data Monitor>LIST

KEYLESS ENTRY(DIAGNOSTICS) > Data Monitor
LIST

Item | Content / display range | Standard | Note
Trip Count [count] | Time stamp information COMMON(diag)>Time Stamp | time | —
Count |  | —
Time Count | ms | —
Battery Voltage | Battery voltage | 0 — 32 V | —
Ignition Signal(Line) | Condition of ignition power supply (direct line) | ON: When the switch is ON OFF: When the switch is OFF | Keyless entry CM, always OFF
Ignition Signal (CAN) | Condition of ignition power supply (CAN communication) | ON: When the switch is ON OFF: When the switch is OFF | —
Number of Registered Keys | Number of registered keyless entry | 0 — 4 | —
Max Number of Register Keys | Maximum number of registered keyless entry | 0 — 4 | —
Key-lock Warning SW | Key warning switch status | ON: When the switch is ON OFF: When the switch is OFF | —
Power Saving Mode | Electricity save mode condition | Normal: Normal Brownout: Saving | —
Keyless ID Registration Mode | Registration mode condition | Normal: Normal Factory Reg: Factory registration mode Dealer Reg: After market registration mode Delete: Delete mode | —

KEYLESS ENTRY(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. KEYLESS ENTRY(DIAGNOSTICS) >Freeze Frame Data>LIST

KEYLESS ENTRY(DIAGNOSTICS) > Freeze Frame Data
LIST

Item | Content / display range | Standard | Note
Trip Count | Time stamp information COMMON(diag)>Time Stamp | time | —
Count |  | —
Time Count | ms | —
Battery Voltage | Battery voltage | 0 — 32 V | —
Ignition Signal(Line) | Condition of ignition power supply (direct line) | ON: When the switch is ON OFF: When the switch is OFF | Keyless entry CM, always OFF
Number of Registered Keys | Number of registered keyless entry | 0 — 4 | —
Power Saving Mode | Electricity save mode condition | OFF: Normal Brownout: Saving | —
Keyless ID Registration Mode | Registration mode condition | Normal: Normal Factory Reg: Factory registration mode Dealer Reg: After market registration mode Delete: Delete mode | —

KEYLESS ENTRY(DIAGNOSTICS) > Work Support
OPERATION
1.

On [Start] screen, select [Diagnosis].

2.

On [Vehicle selection] screen, input the target vehicle information and select [OK].

3.

On [Main Menu] screen, select [Each System].

4.

On [Select System] screen, select [Keyless Entry].

5.

On [Select Function] screen, select [Work Support].

6.

Select a process item.

- For detailed operation procedures, refer to “Help” of application.

- For details on the work support, refer to the list. KEYLESS ENTRY(DIAGNOSTICS) >Work Support>LIST

KEYLESS ENTRY(DIAGNOSTICS) > Work Support
LIST

Item | Contents | Note
Keyless ID Registration | Registration of keyless ID | —
Keyless ID Deletion | Removal of keyless ID | —
ECU specifications information | Displays information of TPMS & keyless entry CM or the keyless entry CM. | —

KEYLESS ENTRY(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. KEYLESS ENTRY(DIAGNOSTICS) >Diagnostic Trouble Code (DTC)>LIST

KEYLESS ENTRY(DIAGNOSTICS) > Diagnostic Trouble Code (DTC)
LIST

Code | Description & trouble part | Reference
B2771 | EEPROM PERFORMANCE | KEYLESS ENTRY(DIAGNOSTICS) >Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2771 EEPROM PERFORMANCE
B2772 | CONTROL MODULE COMMUNICATION STUCK | KEYLESS ENTRY(DIAGNOSTICS) >Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2772 CONTROL MODULE COMMUNICATION STUCK
U0073 | CONTROL MODULE COMMUNICATION BUS OFF | KEYLESS ENTRY(DIAGNOSTICS) >Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0073 CONTROL MODULE COMMUNICATION BUS OFF
U0140 | LOST COMMUNICATION WITH BODY CONTROL MODULE | KEYLESS ENTRY(DIAGNOSTICS) >Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0140 LOST COMMUNICATION WITH BODY CONTROL MODULE
U0155 | LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE | KEYLESS ENTRY(DIAGNOSTICS) >Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0155 LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE
U0422 | INVALID DATA RECEIVED FROM BODY CONTROL MODULE | KEYLESS ENTRY(DIAGNOSTICS) >Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE

KEYLESS ENTRY(DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B2771 EEPROM PERFORMANCE

DTC detecting condition:

When all the following conditions are met.

- Battery voltage stays at 10 V or more for longer than one second.

- CAN bus is not in sleep state.

- Clear memory is not in process.

- Attempt to reading/writing EEPROM fails twice consecutively.

Trouble symptom:

- The key cannot be registered.

- Cannot be locked/unlocked with keyless entry system.

Before performing diagnosis, refer to “CAUTION” in “General Description”. KEYLESS ENTRY(DIAGNOSTICS) >General Description>CAUTION

1. CHECK DTC.
1.

Turn the ignition switch to OFF.

2.

Disconnect the TPMS & keyless entry CM connector or keyless entry CM connector.

3.

Connect the disconnected connectors.

4.

Turn the ignition switch to ON.

5.

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

6.

Turn the ignition switch to OFF.

7.

Turn the ignition switch to ON.

8.

Read the DTC of [Keyless Entry] using the Subaru Select Monitor. KEYLESS ENTRY(DIAGNOSTICS) >Diagnostic Trouble Code (DTC)

Is DTC B2771 displayed? (Current malfunction)

Replace the TPMS & keyless entry CM or keyless entry CM. SECURITY AND LOCKS>Keyless Entry 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, or temporary EEPROM access error has occurred.

KEYLESS ENTRY(DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B2772 CONTROL MODULE COMMUNICATION STUCK

DTC detecting condition:

When all the following conditions are met.

- Battery voltage stays at 10 V or more for longer than one second.

- CAN bus is not in sleep state.

- Clear memory is not in process.

- CAN message register freezes in the TPMS & keyless entry CM or the keyless entry CM

Trouble symptom:

- Communication is impossible with Subaru Select Monitor.

- Cannot be locked/unlocked with keyless entry system.

Before performing diagnosis, refer to “CAUTION” in “General Description”. KEYLESS ENTRY(DIAGNOSTICS) >General Description>CAUTION

1. CHECK DTC.
1.

Turn the ignition switch to OFF.

2.

Disconnect the TPMS & keyless entry CM connector or keyless entry CM connector.

3.

Connect the disconnected connectors.

4.

Turn the ignition switch to ON.

5.

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

6.

Turn the ignition switch to OFF.

7.

Turn the ignition switch to ON.

8.

Read the DTC of [Keyless Entry] using the Subaru Select Monitor. KEYLESS ENTRY(DIAGNOSTICS) >Diagnostic Trouble Code (DTC)

Is DTC B2772 displayed? (Current malfunction)

Replace the TPMS & keyless entry CM or keyless entry CM. SECURITY AND LOCKS>Keyless Entry 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.

KEYLESS ENTRY(DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0073 CONTROL MODULE COMMUNICATION BUS OFF

DTC detecting condition:

When all the following conditions are met.

- Battery voltage stays at 10 V or more for longer than one second.

- CAN bus is not in sleep state.

- Buss off state detected by ISO11898 compliant CAN function is found.

Perform the diagnosis for LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE

KEYLESS ENTRY(DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0140 LOST COMMUNICATION WITH BODY CONTROL MODULE

DTC detecting condition:

When all the following conditions are met.

- Battery voltage stays at 10 V or more for longer than one second.

- CAN bus is not in sleep state.

- Not transitioned to CAN data transmission stop mode.

- When one of reception IDs of body integrated unit becomes and remains in one of the following states for [periodic transmission time (ms) × 40 (frame)].

  - No reception

  - Message length of reception ID is shorter than communication software definition length.

  - Message length of reception ID is longer than 8.

Perform the diagnosis for LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE

KEYLESS ENTRY(DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0155 LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE

DTC detecting condition:

When all the following conditions are met.

- Battery voltage stays at 10 V or more for longer than one second.

- CAN bus is not in sleep state.

- Not transitioned to CAN data transmission stop mode.

- When one of reception IDs of combination meter becomes and remains in one of the following states for [periodic transmission time (ms) × 40 (frame)].

  - No reception

  - Message length of reception ID is shorter than communication software definition length.

  - Message length of reception ID is longer than 8.

Perform the diagnosis for LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE

KEYLESS ENTRY(DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE

DTC detecting condition:

When all the following conditions are met.

- Battery voltage stays at 10 V or more for longer than one second.

- CAN bus is not in sleep state.

- Not transitioned to CAN data transmission stop mode.

- When one of reception IDs of body integrated unit becomes and remains in one of the following states.

  - Lost communication has not been determined.

  - The targeted message counter of reception ID has not been updated 32 times or more consecutively. Or check sum error has been consecutively detected 3 times.

Perform the diagnosis for LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE

KEYLESS ENTRY(DIAGNOSTICS) > Diagnostics with Phenomenon
LIST

Symptoms | Note
Both lock and unlock do not function with keyless entry system. | KEYLESS ENTRY(DIAGNOSTICS) >Diagnostics with Phenomenon>INSPECTION > BOTH LOCK AND UNLOCK DO NOT FUNCTION WITH KEYLESS ENTRY SYSTEM

KEYLESS ENTRY(DIAGNOSTICS) > Diagnostics with Phenomenon
INSPECTION
1. BOTH LOCK AND UNLOCK DO NOT FUNCTION WITH KEYLESS ENTRY SYSTEM

Trouble causes:

- Power supply circuit malfunction in TPMS & keyless entry CM or the keyless entry CM

- Malfunction in TPMS & keyless entry CM or the keyless entry CM

- Keyless key malfunction

- Inspect LAN system according to the basic diagnostic procedure, and make sure that there is no fault.

- Check that the TPMS & keyless entry CM or keyless entry CM is functioning.

- Before performing diagnosis, refer to “CAUTION” in “General Description”. KEYLESS ENTRY(DIAGNOSTICS) >General Description>CAUTION

1. CHECK DOOR LOCK SWITCH.
no

Perform the instructed procedures.

yes
2. CHECK FUSE.
no

Perform the instructed procedures.

yes
3. CHECK HARNESS (POWER SUPPLY CIRCUIT).
no

Perform the instructed procedures.

yes
4. CHECK HARNESS (OPEN CIRCUIT).
no

Perform the instructed procedures.

yes
5. CHECK HARNESS (GROUND SHORT CIRCUIT).
no

Perform the instructed procedures.

yes
6. CHECK KEYLESS TRANSMITTER.
no

Perform the instructed procedures.

yes
7. CHECK TPMS & KEYLESS ENTRY CM OR KEYLESS ENTRY CM.
yes

Perform the instructed procedures.

no

Perform the instructed procedures.

1. CHECK DOOR LOCK SWITCH.

Check that lock/unlock operates by operating the keyless transmitter.

Does it lock/unlock normally?

2

Check the door lock circuit. SECURITY AND LOCKS>Door Lock Control System>INSPECTION > BASIC INSPECTION

2. CHECK FUSE.

Check the fuse. SECURITY AND LOCKS>Relay and Fuse>INSPECTION

Is the check result OK?

3

Replace the fuse.

3. CHECK HARNESS (POWER SUPPLY CIRCUIT).
1.

Disconnect the TPMS & keyless entry CM connector or keyless entry CM connector.

2.

Using a tester, measure the voltage between TPMS & keyless entry CM connector or TPMS CM connector and chassis ground.

Connector & terminal

Keyless entry CM

(R80) No. 12 (+) — Chassis ground (−):

Keyless entry & TPMS CM

(R221) No. 12 (+) — Chassis ground (−):

Is the voltage 9 — 16 V?

4

Repair the power supply circuit.

4. CHECK HARNESS (OPEN CIRCUIT).
1.

Disconnect the body integrated unit connector.

2.

Using a tester, measure the resistance between TPMS & keyless entry CM connector or keyless entry CM connector and body integrated unit.

Connector & terminal

Keyless entry CM

(R80) No. 2 — (i171) No. 1:

(R80) No. 1 — (i171) No. 2:

Keyless entry & TPMS CM

(R221) No. 2 — (i171) No. 1:

(R221) No. 1 — (i171) No. 2:

Is the resistance less than 1 Ω?

5

Repair or replace the open circuit of harness.

5. CHECK HARNESS (GROUND SHORT CIRCUIT).

Using a tester, measure the resistance between TPMS & keyless entry CM connector or keyless entry CM connector and chassis ground.

Connector & terminal

Keyless entry CM

(R80) No. 2 — Chassis ground:

(R80) No. 1 — Chassis ground:

Keyless entry & TPMS CM

(R221) No. 2 — Chassis ground:

(R221) No. 1 — Chassis ground:

Is the resistance 10 kΩ or more?

6

Repair or replace the short circuit of the harness.

6. CHECK KEYLESS TRANSMITTER.

Check the keyless transmitter battery. SECURITY AND LOCKS>Keyless Transmitter>INSPECTION

Is the battery OK?

7

Replace the keyless transmitter battery. SECURITY AND LOCKS>Keyless Transmitter

7. CHECK TPMS & KEYLESS ENTRY CM OR KEYLESS ENTRY CM.
1.

Connect the TPMS & keyless entry CM connector or keyless entry CM connector.

2.

Turn the ignition switch to OFF and close all doors.

3.

Perform the lock operation using the keyless key.

Does the door lock?

Currently, it is normal.

Replace the TPMS & keyless entry CM or keyless entry CM. WHEEL AND TIRE SYSTEM>Tire Pressure Monitoring System SECURITY AND LOCKS>Keyless Entry Control Module