POWER STEERING (DIAGNOSTICS)
PS(diag)

POWER STEERING (DIAGNOSTICS) > Basic Diagnostic Procedure
PROCEDURE

- The power steering control module continues to operate after the engine stops and calculate the temperature in the control module. Therefore, before starting service of the power steering system which requires disconnection of the connector, stop the engine and allow approx. 30 minutes until the control module becomes cold.

- Before removal or installation, be sure to remove any foreign matter (dust, moisture, oil, etc.) from the power steering control module connector.

- Be sure to record the malfunction information obtained via DTC check.

- Do not perform the clear memory until the repair or replacement of faulty parts is completed.

- If a problem (connector terminal with foreign matter, etc.) is found, record the faulty part (take a photo • store the foreign matter, etc.).

1. PERFORM CUSTOMER INTERVIEW.

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

Did you interview the customer?

2

Perform the interview, and 2

2. BASIC INSPECTION.

Perform basic inspection. POWER STEERING (DIAGNOSTICS)>General Description>INSPECTION

Is the check result OK?

3

Repair the faulty part found in basic inspection, and 3

3. CHECK WARNING LIGHT.

Check the lighting condition of STEERING warning light in the combination meter.

Does the STEERING warning light illuminate?

4

Currently, it is normal.

4. 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 [Power Steering System].

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

Is communication possible?

5

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

5. CHECK DTC.

Read the DTC of [Power Steering System] using the Subaru Select Monitor. POWER STEERING (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Are DTC, time stamp and freeze frame data displayed?

Record the DTC, time stamp and freeze frame data. 7

6

6. PERFORM GENERAL DIAGNOSTICS.
1.

Execute the inspection mode. POWER STEERING (DIAGNOSTICS)>Inspection Mode

2.

Read the DTC of [Power Steering] using the Subaru Select Monitor. POWER STEERING (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

3.

Check that the DTC is not displayed.

Does the STEERING warning light illuminate at ignition switch ON, and turn off two seconds after the engine is started?

Finish the diagnosis.

POWER STEERING (DIAGNOSTICS)>Warning Light Illumination Pattern>STEERING WARNING LIGHT DOES NOT GO OFF

7. PERFORM DIAGNOSIS.
1.

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

2.

Repair or replace the cause of trouble.

3.

Execute the inspection mode. POWER STEERING (DIAGNOSTICS)>Inspection Mode

4.

Read the DTC of [Power Steering] using the Subaru Select Monitor. POWER STEERING (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC displayed in current malfunction?

Repeat step 7 until DTC is not shown.

Clear the memory to finish the diagnosis. COMMON(diag)>Clear memory

POWER STEERING (DIAGNOSTICS) > Check List for Interview
CHECK

Check the following items regarding condition of the vehicle.

1. TROUBLE STATUS

Phenomenon of the vehicle | Steering is heavy Steering is not smooth Steering is unstable (wondering) Steering does not return to center Steering is not straight
Steering force required is not the same for right and left turn Steering force required is not even Steering is too light
Noise Vibration STEERING warning light illuminates Other
Frequency | Always Sometimes Immediately after starting the engine Only once Other
Recovers after leaving it for     minutes
Steering wheel operation | Dry steering When turning Quick steering Slow steering Returning the steering wheel End abutting
Releasing the steering wheel Only supporting the steering wheel by hand Repetitive dry steering Beginning of steering
Steering wheel status / direction | Around center position Near end of lock to lock
When turning the steering to right When turning the steering to left Both to right and to left (1) Steering angle:     degrees (2) Maneuvering time:     minutes
Slow steering Quick steering While holding the steering When repeating the dry wheel operation
Vehicle speed | Stall 0 km/h (0 MPH) Very low speed up to 20 km/h (up to 12 MPH) Low speed up to 40 km/h (up to 25 MPH) Medium speed up to 80 km/h (up to 50 MPH) High speed 80 km/h or more (50 MPH or more)
At starting While accelerating While decelerating When accelerating rapidly When decelerating rapidly
Other
Engine speed | Idling (1) Near rpm (2)rpm — rpm (3)rpm or more • or less

2. STATE OF STEERING WARNING LIGHT

STEERING warning light illuminates | Always Sometimes Only once Does not illuminate Other
Ignition key position | LOCK ACC ON (when starting engine) START ON (when starting engine, while engine is running) ON (when starting engine, when engine is at a standstill)
Timing | Immediately after turning the ignition ON Immediately after turning the ignition to START
At idling During Auto Start Stop When reversing While accelerating While decelerating When cruising at    —   km/h (MPH)
When other electronic parts are in operation (part name:         operation condition:                 )

3. ENVIRONMENT

a) Weather | Fine Cloudy Rainy Snowy Other:
b) Outside temperature | °C (°F)
c) Road | Inner city Suburbs Highway Local street Alley way Private road Parking lot Mountain road Paved road Unpaved road Gravel road Sandy place Muddy road Concrete road Stone pavement Racetrack Other:
d) Road surface | Dry Wet Covered with fresh snow Covered with hardened snow Other:
e) Tire | Tire chain Studless tire T-type tire (front RH, front LH, rear RH, rear LH)
f) Tire inflation pressure | Front RH:   kPa   Front LH:   kPa   Rear RH:   kPa   Rear LH:   kPa
g) Degree of wear | Front RH:   mm (in) Front LH:   mm (in) Rear RH:   mm (in) Rear LH:   mm (in)
h) Genuine part | Yes No Record after-market parts if any. (Steering wheel, audio, tires, and similar parts)
i) Condition of suspension alignment |
j) Electrical load conditions | Audio Air conditioner Other
k) Loaded state | Condition:
l) Repair parts | No Yes Contents:
m) Others |

POWER STEERING (DIAGNOSTICS) > General Description
CAUTION
1. SRS AIRBAG SYSTEM

- 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.

POWER STEERING (DIAGNOSTICS) > General Description
INSPECTION

Before performing diagnosis, check the following items which might be affecting the power steering problem.

1. BATTERY

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

2. TIRES

Check the tire specifications, tire wear and air pressure. WHEEL AND TIRE SYSTEM>General Description>SPECIFICATION

POWER STEERING (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 of Subaru Select Monitor 4, refer to “Help” of application.
| 34199AG100 | SPECIAL TOOL HARNESS | Used for troubleshooting the electrical system.

2. GENERAL TOOL

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

POWER STEERING (DIAGNOSTICS) > General Description
SYSTEM BLOCK DIAGRAM
POWER STEERING (DIAGNOSTICS) > Electrical Component Location
LOCATION

(1) | Steering gearbox (including power steering control module) |  |

POWER STEERING (DIAGNOSTICS) > Control Module I/O Signal
ELECTRICAL SPECIFICATION

Connector No. | Terminal No. | Contents | Measuring condition | Standard
B450 | 1 | Ignition power supply | Ignition SW: ON Measurement between (B450) No. 1 — (B452) No. 1 | 9 — 16 V
B450 | 6 | CAN communication | Digital signal; can not be measured | —
B450 | 7 | CAN communication | Digital signal; can not be measured | —
B452 | 1 | Ground | Always Measurement between (B452) No. 1 — (B452) No. 2 | 10 — 16 V
B452 | 2 | Battery power supply

POWER STEERING (DIAGNOSTICS) > Inspection Mode
PROCEDURE
1.

Turn the ignition switch to OFF for 5 seconds or more.

2.

Start the engine.

3.

Idle the engine for five seconds or more.

4.

Operate the steering wheel from side to side.

5.

Reproduce the malfunction occurrence condition as much as possible.

POWER STEERING (DIAGNOSTICS) > Warning Light Illumination Pattern
INSPECTION

(1) | STEERING warning light |  |  |  |

- When the ignition switch is turned to ON (engine OFF), the STEERING warning light illuminates.

- After starting the engine, the STEERING warning light goes out. If it does not go off, a malfunction occurs in electric power steering • combination meter.

POWER STEERING (DIAGNOSTICS) > Warning Light Illumination Pattern
STEERING WARNING LIGHT DOES NOT COME ON
1. POWER STEERING ASSIST ENABLED

Detecting condition:

- Defective combination meter

- Defective harness

Trouble symptom:

When the ignition switch is turned to ON (engine OFF), the STEERING warning light does not illuminate.

It is operating normally if the warning light illuminates when the ignition switch is turned to ON (engine OFF), and turns off approximately two seconds after engine start.

1. CHECK ILLUMINATION OF OTHER LIGHTS.
no

Perform the instructed procedures.

yes
2. CHECK LAN SYSTEM.
no

Perform the instructed procedures.

yes
3. CHECK COMBINATION METER.
yes

Perform the instructed procedures.

no

Perform the instructed procedures.

1. CHECK ILLUMINATION OF OTHER LIGHTS.

Turn the ignition switch to ON. (Engine OFF)

Do other warning lights illuminate?

2

Check the combination meter. INSTRUMENTATION/DRIVER INFO>Combination Meter System>INSPECTION

2. CHECK LAN SYSTEM.

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

Is the check result OK?

3

Perform the diagnosis for LAN system.

3. CHECK COMBINATION METER.

Check the combination meter. INSTRUMENTATION/DRIVER INFO>Combination Meter System>OPERATION > SELF-DIAGNOSIS DISPLAY MODE

Is the check result OK?

Current condition is normal.

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

2. POWER STEERING ASSIST DISABLED

Detecting condition:

CAN communication error (engine rpm signal not received)

Trouble symptom:

- Not assisted due to power supply voltage failure.

- The STEERING warning light is normal but there is no power steering assist (steering feels heavy).

- During driving, the assist system will not be activated when the ignition voltage drops.

- Power steering assist is not started unless both of the ignition switch ON signal and the engine speed signal are input.

- In any of the following cases, the power steering assist is limited and steering wheel operation may become heavy.

  If the steering wheel is held to an end for a long time, or the steering wheel turning to right and left at slow speed is repeated during parking, the assist limitation (overheat protection control) may operate to prevent failures by overheat.

  In this case, by stopping the engine for approx. 30 minutes for cooling, the assist will start operating. While assist limitation (overheat protection control) is in active, [Limited Assist] is displayed in [EPS Status] in the Subaru Select Monitor “Data Monitor”.

- History can be confirmed on [ECU Overheat Protection] or [IG Count after ECU Overheat Protection(latest)] of “Data Monitor”.

- The overheat protection control system is normal operation, therefore, the STEERING warning light will not come on and there will be no DTC displayed.

- If the power steering system connector is disconnected while cooling under the overheat protection control, different DTC may be recorded. If there is no DTC and assist limitation is in active, stop the engine for approx. 10 minutes for cooling.

1. CHECK BATTERY.
no

Perform the instructed procedures.

yes
2. CHECK BATTERY TERMINAL AND FUSE.
no

Perform the instructed procedures.

yes
3. CHECK DTC.
yes

Perform the instructed procedures.

no

4

4. CHECK DATA MONITOR.
no

Perform the instructed procedures.

yes
5. CHECK DATA MONITOR.
yes

Perform the instructed procedures.

no

6

6. CHECK DATA MONITOR.
no

Perform the instructed procedures.

yes
7. CHECK DATA MONITOR.
no

Perform the instructed procedures.

yes
8. CHECK CONNECTOR.
yes

Perform the instructed procedures.

no

Perform the instructed procedures.

1. CHECK BATTERY.

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

Is the check result OK?

2

Charge or replace the battery.

2. CHECK BATTERY TERMINAL AND FUSE.

Check the battery terminals and the fuse.

Is the check result OK?

3

Repair or replace faulty parts.

3. CHECK DTC.

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

Is DTC related to VDC system or ignition power supply system displayed?

Perform the diagnosis according to the DTC. BRAKE CONTROL (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>LIST

4

4. CHECK DATA MONITOR.
1.

Start the engine.

2.

Using Subaru Select Monitor, select [Data Monitor] of [Power Steering] and display [Engine Speed]. POWER STEERING (DIAGNOSTICS)>Data Monitor

Is [Engine Speed] the same as that in the combination meter?

5

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

5. CHECK DATA MONITOR.

Using Subaru Select Monitor, select [Data Monitor] of [Power Steering] and display [EPS Status]. POWER STEERING (DIAGNOSTICS)>Data Monitor

Is [Assist limitation] displayed?

It is possible that temporary assist limitation has occurred due to overheat protection. Stop the engine for approx. 30 minutes, and check again.

6

6. CHECK DATA MONITOR.
1.

Using Subaru Select Monitor, select [Data Monitor] of [Power Steering] and display [Torque Sensor Main] and [Torque Sensor Sub]. POWER STEERING (DIAGNOSTICS)>Data Monitor

2.

Move the steering wheel to the left and right.

Do the values of [Torque Sensor Main] and [Torque Sensor Sub] change along with the operation?

7

Check for poor contact of the torque sensor connector.

7. CHECK DATA MONITOR.

Using Subaru Select Monitor, select [Data Monitor] of [Power Steering] and display [IG voltage]. POWER STEERING (DIAGNOSTICS)>Data Monitor

Is [IG voltage] stable? (While wiggling the harness)

8

Check the ignition switch and IG voltage harness, and repair the defective part.

8. CHECK CONNECTOR.
1.

Turn the ignition switch to OFF.

2.

Disconnect the connector (B204).

Are there any damages to terminal or other parts either on the power steering control module side or on the connector side?

Repair the terminal.

Replace the steering gearbox. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

POWER STEERING (DIAGNOSTICS) > Warning Light Illumination Pattern
STEERING WARNING LIGHT DOES NOT GO OFF

Detecting condition:

- Defective combination meter

- Open circuit of harness

Trouble symptom:

When starting the engine, the STEERING warning light continues to illuminate.

1. CHECK DTC.

Read the DTC of [Power Steering] using the Subaru Select Monitor. POWER STEERING (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Are any DTCs displayed?

Perform the diagnosis according to the DTC. POWER STEERING (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>LIST

2

2. CHECK LAN SYSTEM.

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

Is the check result OK?

3

Perform the diagnosis for LAN system.

3. CHECK COMBINATION METER.

Check the combination meter. INSTRUMENTATION/DRIVER INFO>Combination Meter System>OPERATION > SELF-DIAGNOSIS DISPLAY MODE

Is the check result OK?

Replace the steering box. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

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

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure for Subaru Select Monitor Communication
INSPECTION

Detecting condition:

- Defective harness connector

- Defective power steering control module

Trouble symptom:

- Communication is impossible between the power steering control module and Subaru Select Monitor.

- After starting the engine, the STEERING warning light does not illuminate but steering effort is heavy.

Wiring diagram:

Electric power steering system WIRING SYSTEM>Electric Power Steering System

1. CHECK IGNITION SWITCH.

Is the ignition switch ON?

2

Turn the ignition switch to ON, and select the [Power Steering] using the Subaru Select Monitor.

2. CHECK BATTERY.
1.

Turn the ignition switch to OFF.

2.

Measure the battery voltage.

Is the voltage 11 V or more?

3

Charge or replace the battery.

3. CHECK BATTERY TERMINAL.

Is there poor contact at battery terminal?

Replace or tighten the battery terminal.

4

4. CHECK POWER STEERING CONTROL MODULE CONNECTOR INSTALLATION.

Turn the ignition switch to OFF.

Is the power steering control module connector inserted into the power steering control module until the clamp locks?

5

Insert the power steering control module connector into the power steering control module.

5. CHECK LAN SYSTEM.

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

Is the check result OK?

6

Perform the diagnosis for LAN system.

6. CHECK SUBARU SELECT MONITOR COMMUNICATION.
1.

Turn the ignition switch to ON.

2.

Check whether communication to electric power steering system can be executed normally.

Is the [Select Function] screen displayed?

Check DTC of electric power steering system. POWER STEERING (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>LIST

7

7. CHECK SUBARU SELECT MONITOR COMMUNICATION.

Connect the Subaru Select Monitor to another vehicle to check whether the communication for initializing can be executed normally.

Does the Subaru Select Monitor communicate normally?

8

Repair or replace the Subaru Select Monitor.

8. CHECK POWER SUPPLY CIRCUIT.
1.

Turn the ignition switch to ON. (Engine OFF)

2.

Measure the ignition power supply voltage between the power steering control module connector and chassis ground.

Connector & terminal

(B204) No. 3 (+) — Chassis ground (−):

(B206) No. 2 (+) — Chassis ground (−):

Is the voltage 10 — 15 V?

9

Repair the open circuit in the harness between the power steering control module and the battery.

9. CHECK HARNESS CONNECTOR BETWEEN POWER STEERING CONTROL MODULE AND CHASSIS GROUND.
1.

Turn the ignition switch to OFF.

2.

Disconnect the connector from the power steering control module.

3.

Measure the resistance of harness between power steering control module connector and chassis ground.

Connector & terminal

(B206) No. 1 — Chassis ground:

Is the resistance less than 10 Ω?

10

Repair the open circuit of the power steering control module ground circuit and the poor contact of connector.

10. CHECK POOR CONTACT OF CONNECTOR.

Is there poor contact of power steering control module power supply, ground circuit and data link connector?

Repair the connector.

Replace the steering gearbox. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

POWER STEERING (DIAGNOSTICS) > Data Monitor
OPERATION

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

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

POWER STEERING (DIAGNOSTICS) > Data Monitor
LIST

Item | Contents | Standard/Unit | Note
Power Supply Current | Primary current recognized by power steering CM | −128 — 127 A | —
Vehicle Speed | Vehicle speed | 0 — 255 km/h | —
Engine Speed | Engine speed | 0 — 12750 rpm | —
CU Sensing Current(q) | q axis current recognized by power steering CM | −128 — 127 A | —
Motor Current(U) | U axis current recognized by power steering CM | −128 — 127 A | —
Motor Current(V) | V axis current recognized by power steering CM | −128 — 127 A | —
Motor Speed | Motor rotational speed (rpm) | −4096 — 4064 rpm | —
CU Temperature | Power steering CM inner temperature | −50 — 205 °C | —
Power Supply Voltage | Voltage supplied to power steering CM | 0 — 25.5 V | —
Torque Sensor Power Supply | Voltage supplied to torque sensor | 0 — 10.2 V | —
IG Voltage | IGN voltage recognized by power steering CM | 0 — 25.5 V | —
CAN Bus Status | CAN bus status | Active/Passive/Bus off | —
EPS Status | EPS assist status | Normal/Assist stop/Assist limitation | —
CU Target current(q) | q axis indicator current from power steering CM to motor | −128 — 127 A | —
Assist Map | Assist MAP specification used for control | MAP1/MAP2/MAP3 | —
ECU Overheat Protection | Number of interventions to the overheat protection control | 0 — 250 Time | —
IG Count after ECU Overheat Protection(latest) | Number of times the ignition switch is ON at the last intervention to overheat protection control | 0 — 65000 Time | —
IG Count after ECU Overheat Protection(Previous) | Number of times the ignition switch is ON at the second last intervention to overheat protection control | 0 — 65000 Time | —
IG Count after ECU Overheat Protection(Before Previous) | Number of times the ignition switch is ON at the third last intervention to overheat protection control | 0 — 65000 Time | —
Assist limited(Abnormal voltage) | Number of the intervention of assist restriction control due to voltage failure | 0 — 250 Time | —
IGN-OFF Intervention Count while Running | Number of times the ignition switch is turned OFF while driving | 0 — 250 Time | —
Torque Sensor Main | Torque sensor (main) output value | −15.36 — 15.24 Nm | —
Torque Sensor Sub | Torque sensor (sub) output value | −15.36 — 15.24 Nm | —
Steering Angle | Steering wheel rotational angle | −640 — 640 deg | —

POWER STEERING (DIAGNOSTICS) > Freeze Frame Data
OPERATION

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

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

POWER STEERING (DIAGNOSTICS) > Freeze Frame Data
LIST

Item | Contents | Standard/Unit | Note
Power Supply Current | Primary current recognized by power steering CM | −128 — 127 A | —
Vehicle Speed | Vehicle speed | 0 — 255 km/h | —
Engine Speed | Engine speed | 0 — 12750 rpm | —
CU Sensing Current(q) | q axis current recognized by power steering CM | −128 — 127 A | —
Motor Current(U) | U axis current recognized by power steering CM | −128 — 127 A | —
Motor Current(V) | V axis current recognized by power steering CM | −128 — 127 A | —
Motor Speed | Motor rotational speed (rpm) | −4096 — 4064 rpm | —
CU Temperature | Power steering CM inner temperature | −50 — 205 °C | —
Power Supply Voltage | Voltage supplied to power steering CM | 0 — 25.5 V | —
Torque Sensor Power Supply | Voltage supplied to torque sensor | 0 — 10.2 V | —
IG Voltage | IGN voltage recognized by power steering CM | 0 — 25.5 V | —
CAN Bus Status | CAN bus status | Active/Passive/Bus off | —
EPS Status | EPS assist status | Normal/Assist stop/Assist limitation | —
CU Target current(q) | q axis indicator current from power steering CM to motor | −128 — 127 A | —
Assist Map | Assist MAP specification used for control | MAP1/MAP2/MAP3 | —
ECU Overheat Protection | Number of interventions to the overheat protection control | 0 — 250 Time | —
IG Count after ECU Overheat Protection(latest) | Number of times the ignition switch is ON at the last intervention to overheat protection control | 0 — 65000 Time | —
IG Count after ECU Overheat Protection(Previous) | Number of times the ignition switch is ON at the second last intervention to overheat protection control | 0 — 65000 Time | —
IG Count after ECU Overheat Protection(Before Previous) | Number of times the ignition switch is ON at the third last intervention to overheat protection control | 0 — 65000 Time | —
Assist limited(Abnormal voltage) | Number of the intervention of assist restriction control due to voltage failure | 0 — 250 Time | —
IGN-OFF Intervention Count while Running | Number of times the ignition switch is turned OFF while driving | 0 — 250 Time | —
Torque Sensor Main | Torque sensor (main) output value | −15.36 — 15.24 Nm | —
Torque Sensor Sub | Torque sensor (sub) output value | −15.36 — 15.24 Nm | —
Steering Angle | Steering wheel rotational angle | −640 — 640 deg | —

POWER STEERING (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. POWER STEERING (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>LIST

POWER STEERING (DIAGNOSTICS) > Diagnostic Trouble Code (DTC)
LIST

Code | Item | Reference
None | No display | POWER STEERING (DIAGNOSTICS)>Warning Light Illumination Pattern>STEERING WARNING LIGHT DOES NOT GO OFF
[Assist limitation] is displayed on the data monitor [EPS operating condition]. | POWER STEERING (DIAGNOSTICS)>Warning Light Illumination Pattern>STEERING WARNING LIGHT DOES NOT GO OFF
The data monitor [Overheating protection intervention history] indicates at least 1 time. | POWER STEERING (DIAGNOSTICS)>Warning Light Illumination Pattern>STEERING WARNING LIGHT DOES NOT GO OFF
C2511 | TORQUE SENSOR MAIN | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2511 TORQUE SENSOR MAIN
C2512 | TORQUE SENSOR SUB | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2512 TORQUE SENSOR SUB
C2513 | TORQUE SENSOR MUCH TOLERANCE | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2513 TORQUE SENSOR MUCH TOLERANCE
C2514 | TORQUE SENSOR POWER SUPPLY | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2514 TORQUE SENSOR POWER SUPPLY
C2521 | MOTOR MALFUNCTION | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2521 MOTOR MALFUNCTION
C2522 | RESOLVER SENSOR | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2522 RESOLVER SENSOR
C2531 | CONTROL MODULE CPU | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2531 CONTROL MODULE CPU
C2532 | CONTROL MODULE PERIPHERAL CIRCUIT | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2532 CONTROL MODULE PERIPHERAL CIRCUIT
C2533 | CONTROL MODULE BOARD TEMPERATURE SENSOR | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2533 CONTROL MODULE BOARD TEMPERATURE SENSOR
C2541 | VEHICLE DYNAMICS CONTROL MODULE VEHICLE SPEED SENSOR | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2541 VEHICLE DYNAMICS CONTROL MODULE VEHICLE SPEED SENSOR
C2543 | ERROR PASSIVE | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2543 ERROR PASSIVE
C2544 | AUTO START STOP SYSTEM | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2544 AUTO START STOP SYSTEM
C2545 | EYESIGHT SYSTEM | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2545 EYESIGHT SYSTEM
C2546 | EYESIGHT VALUE | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2546 EYESIGHT VALUE
C2547 | EYESIGHT CHECK SUM | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2547 EYESIGHT CHECK SUM
C2551 | POWER SUPPLY RELAY | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC C2551 POWER SUPPLY RELAY
U0073 | CONTROL MODULE COMMUNICATION BUS OFF | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0073 CONTROL MODULE COMMUNICATION BUS OFF
U0100 | LOST COMMUNICATION WITH ECM/PCM "A" | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0100 LOST COMMUNICATION WITH ECM/PCM "A"
U0122 | LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0122 LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE
U0126 | LOST COMMUNICATION WITH STEERING ANGLE SENSOR MODULE | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0126 LOST COMMUNICATION WITH STEERING ANGLE SENSOR MODULE
U0155 | LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0155 LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE
U0401 | INVALID DATA RECEIVED FROM ECM/PCM "A" | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0401 INVALID DATA RECEIVED FROM ECM/PCM "A"
U0416 | INVALID DATA RECEIVED FROM VEHICLE DYNAMICS CONTROL MODULE | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0416 INVALID DATA RECEIVED FROM VEHICLE DYNAMICS CONTROL MODULE
U1120 | LOST COMMUNICATION WITH AUTOSTART STOP CONTROL MODULE | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U1120 LOST COMMUNICATION WITH AUTOSTART STOP CONTROL MODULE
U1235 | LOST COMMUNICATION WITH EyeSight | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U1235 LOST COMMUNICATION WITH EyeSight
U1433 | INVALID DATA RECEIVED FROM EyeSight | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U1433 INVALID DATA RECEIVED FROM EyeSight
U1469 | INVALID DATA RECEIVED FROM AUTOSTART STOP CONTROL MODULE | POWER STEERING (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U1469 INVALID DATA RECEIVED FROM AUTOSTART STOP CONTROL MODULE

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC C2511 TORQUE SENSOR MAIN

Do not perform the clear memory after checking DTCs.

When this code is displayed, replace the steering gearbox. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC C2512 TORQUE SENSOR SUB

Do not perform the clear memory after checking DTCs.

When this code is displayed, replace the steering gearbox. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC C2513 TORQUE SENSOR MUCH TOLERANCE

Do not perform the clear memory after checking DTCs.

When this code is displayed, replace the steering gearbox. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC C2514 TORQUE SENSOR POWER SUPPLY

Do not perform the clear memory after checking DTCs.

When this code is displayed, replace the steering gearbox. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC C2521 MOTOR MALFUNCTION

Do not perform the clear memory after checking DTCs.

When this code is displayed, replace the steering gearbox. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC C2522 RESOLVER SENSOR

Do not perform the clear memory after checking DTCs.

When this code is displayed, replace the steering gearbox. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC C2531 CONTROL MODULE CPU

Do not perform the clear memory after checking DTCs.

When this code is displayed, replace the steering gearbox. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC C2532 CONTROL MODULE PERIPHERAL CIRCUIT

Do not perform the clear memory after checking DTCs.

When this code is displayed, replace the steering gearbox. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC C2533 CONTROL MODULE BOARD TEMPERATURE SENSOR

Do not perform the clear memory after checking DTCs.

When this code is displayed, replace the steering gearbox. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC C2541 VEHICLE DYNAMICS CONTROL MODULE VEHICLE SPEED SENSOR

DTC detecting condition:

When VDCCM reception failure (related to vehicle speed sensor) is detected after the ignition switch is ON.

Trouble symptom:

The steering wheel operation feels heavy.

1. CHECK DTC.

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

Is a DTC related to VDC system or vehicle speed signal system displayed?

Perform the diagnosis according to the DTC. BRAKE CONTROL (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>LIST

2

2. CHECK LAN SYSTEM.

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

Is the check result OK?

3

Perform the diagnosis for LAN system.

3. CHECK VEHICLE SPEED SIGNAL.
1.

Using Subaru Select Monitor, select [Data Monitor] of [Power Steering] and display [Vehicle Speed]. POWER STEERING (DIAGNOSTICS)>Data Monitor

2.

Lift up the vehicle (so that the wheels turn freely), start the engine, and raise engine speed in gear.

Be careful that no one is near the spinning tires and nothing gets caught in them.

3.

Check for whether the data changes according to vehicle speed.

Is the data in sync with the vehicle speed?

It is possible that temporary poor communication occurs. Clear the memory. COMMON(diag)>Clear memory

Replace the steering gearbox. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC C2543 ERROR PASSIVE

DTC detecting condition:

When send/receive failure of CAN communication is detected after the ignition switch is ON.

Trouble symptom:

The steering wheel operation feels heavy.

Wiring diagram:

Electric power steering system WIRING SYSTEM>Electric Power Steering System

1. CHECK PERIPHERALS.

Check the data link connector.

Is any other electrical part connected to the data link connector or harness?

Disconnect the connection of electrical parts and perform inspection again.

2

2. CHECK LAN SYSTEM.

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

Is the check result OK?

3

Perform the diagnosis for LAN system.

3. CHECK DTC.

Read the DTC of [Power Steering] using the Subaru Select Monitor. POWER STEERING (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC C2543 displayed in current malfunction?

4

System is normal. Temporary interference from noise is a possible cause. Clear the memory to complete the diagnosis. COMMON(diag)>Clear memory

4. CHECK CONNECTOR.

Check the connecting condition of connector.

Is the connector firmly installed?

5

Install the connector, and check again.

5. CHECK CONNECTOR.
1.

Turn the ignition switch to OFF.

2.

Disconnect the connector (B204).

Is there crimped or spread portion in connector terminal on vehicle harness side and power steering control module side?

Repair or replace faulty parts.

6

6. CHECK HARNESS.

Check the harness related to CAN communication system.

Is there any fault in the harness?

Repair or replace the harness.

Replace the steering gearbox. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC C2544 AUTO START STOP SYSTEM

DTC detecting condition:

- When a failure of CAN communication is detected after the ignition switch is ON.

- When the power steering control module has a detection error after the ignition switch is ON.

Trouble symptom:

Auto Start Stop does not operate.

1. CHECK DTC.

Read the DTC of [Auto Start Stop] using the Subaru Select Monitor. AUTO START STOP (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC of Auto Start Stop system displayed?

Perform the diagnosis according to the DTC. AUTO START STOP (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>LIST

2

2. CHECK LAN SYSTEM.

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

Is the check result OK?

3

Perform the diagnosis for LAN system.

3. CHECK POWER STEERING CONTROL MODULE.
1.

Execute the inspection mode. POWER STEERING (DIAGNOSTICS)>Inspection Mode

2.

Read the DTC using Subaru Select Monitor. POWER STEERING (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC C2544 displayed in current malfunction?

Replace the steering gearbox. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

It results from a temporary noise interference. Clear the memory to complete the diagnosis. COMMON(diag)>Clear memory

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC C2545 EYESIGHT SYSTEM

DTC detecting condition:

When the EyeSight system fail flag from stereo camera is received after the ignition switch is ON.

Trouble symptom:

EyeSight steering support function does not operate.

1. CHECK POOR CONTACT OF CONNECTOR.

Is there poor contact of the stereo camera connector?

Repair the poor contact of connector.

2

2. CHECK DTC.

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

Is DTC of EyeSight system displayed?

Perform the diagnosis according to the DTC. EyeSight (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>LIST

3

3. CHECK LAN SYSTEM.

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

Is the check result OK?

4

Perform the diagnosis for LAN system.

4. CHECK POWER STEERING CONTROL MODULE.
1.

Connect all connectors.

2.

Execute the inspection mode. POWER STEERING (DIAGNOSTICS)>Inspection Mode

3.

Read the DTC using Subaru Select Monitor. POWER STEERING (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC C2545 displayed in current malfunction?

Replace the steering gearbox. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

It results from a temporary noise interference. Clear the memory to complete the diagnosis. COMMON(diag)>Clear memory

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC C2546 EYESIGHT VALUE

DTC detecting condition:

When the steering support indication value from stereo camera is out of range after the ignition switch is ON.

Trouble symptom:

EyeSight steering support function does not operate.

1. CHECK POOR CONTACT OF CONNECTOR.

Is there poor contact of the stereo camera connector?

Repair the poor contact of connector.

2

2. CHECK DTC.

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

Is DTC of EyeSight system displayed?

Perform the diagnosis according to the DTC. EyeSight (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>LIST

3

3. CHECK LAN SYSTEM.

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

Is the check result OK?

4

Perform the diagnosis for LAN system.

4. CHECK POWER STEERING CONTROL MODULE.
1.

Connect all connectors.

2.

Execute the inspection mode. POWER STEERING (DIAGNOSTICS)>Inspection Mode

3.

Read the DTC using Subaru Select Monitor. POWER STEERING (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC C2546 displayed in current malfunction?

Replace the steering gearbox. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

It results from a temporary noise interference. Clear the memory to complete the diagnosis. COMMON(diag)>Clear memory

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC C2547 EYESIGHT CHECK SUM

DTC detecting condition:

When checksum error of EyeSight transmission data is detected after the ignition switch is ON.

Trouble symptom:

EyeSight steering support function does not operate.

1. CHECK POOR CONTACT OF CONNECTOR.

Is there poor contact of the stereo camera connector?

Repair the poor contact of connector.

2

2. CHECK DTC.

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

Is DTC of EyeSight system displayed?

Perform the diagnosis according to the DTC. EyeSight (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>LIST

3

3. CHECK LAN SYSTEM.

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

Is the check result OK?

4

Perform the diagnosis for LAN system.

4. CHECK POWER STEERING CONTROL MODULE.
1.

Connect all connectors.

2.

Execute the inspection mode. POWER STEERING (DIAGNOSTICS)>Inspection Mode

3.

Read the DTC using Subaru Select Monitor. POWER STEERING (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

Is DTC C2547 displayed in current malfunction?

Replace the steering gearbox. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

It results from a temporary noise interference. Clear the memory to complete the diagnosis. COMMON(diag)>Clear memory

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC C2551 POWER SUPPLY RELAY

DTC detecting condition:

- When short malfunction of power supply relay is detected at initial check.

- When power supply voltage failure is detected after the ignition switch is ON.

- When power supply voltage drop is detected with 500 rpm engine speed reception.

Trouble symptom:

- The steering wheel operation feels heavy.

- STEERING warning light illuminates.

Wiring diagram:

Electric power steering system WIRING SYSTEM>Electric Power Steering System

If power supply voltage failure exists at the vehicle side, the warning light goes off if the normal voltage returns.

1. CHECK BATTERY.

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

Is the check result OK?

2

Charge or replace the battery.

2. CHECK BATTERY TERMINAL AND FUSE.

Check the battery terminals and the fuse.

Is the check result OK?

3

Repair or replace faulty parts.

3. CHECK WIRING HARNESS.
1.

Disconnect the connector. (B205, B206)

2.

Turn the ignition switch to ON.

3.

Using a tester and special tool harness, check the voltage between terminals.

Connector & terminal

(B205) No. 2 (+) — Chassis ground (−):

Is the voltage 12 V or more?

4

Repair the open circuit of harness or the poor contact of connector between the power steering control module and the battery.

4. CHECK GROUND CIRCUIT.
1.

Turn the ignition switch to OFF.

2.

Using a tester and special tool harness, check the resistance between terminals.

Connector & terminal

(B205) No. 1 — Chassis ground:

Is the resistance less than 1 Ω?

5

Repair the open circuit or poor contact of the harness between the power steering control module and chassis ground.

5. CHECK HARNESS.
1.

Turn the ignition switch to OFF.

2.

Disconnect the power steering control module connector (B452).

3.

Using a tester and special tool harness, check the resistance between harness terminals.

Connector & terminal

(B206) No. 1 — (B452) No. 1:

(B206) No. 2 — (B452) No. 2:

Is the resistance less than 1 Ω?

Replace the steering gearbox. POWER ASSISTED SYSTEM (POWER STEERING)>Electric Power Steering Gearbox

Repair or replace the harness.

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

Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedure. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0100 LOST COMMUNICATION WITH ECM/PCM "A"

Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedure. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0122 LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE

Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedure. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0126 LOST COMMUNICATION WITH STEERING ANGLE SENSOR MODULE

Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedure. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure

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

Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedure. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0401 INVALID DATA RECEIVED FROM ECM/PCM "A"

Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedure. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0416 INVALID DATA RECEIVED FROM VEHICLE DYNAMICS CONTROL MODULE

Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedure. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U1120 LOST COMMUNICATION WITH AUTOSTART STOP CONTROL MODULE

Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedure. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U1235 LOST COMMUNICATION WITH EyeSight

Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedure. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U1433 INVALID DATA RECEIVED FROM EyeSight

Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedure. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure

POWER STEERING (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U1469 INVALID DATA RECEIVED FROM AUTOSTART STOP CONTROL MODULE

Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedure. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure