S-AWC (Super All Wheel Control)

DTC U0126: Steering Wheel Sensor Time-out Error

CAUTION:

- If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines.
- Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
- When the steering wheel sensor is replaced, calibrate the steering wheel sensor (refer to On-vehicle Service Testing and Inspection ), and initialize the steering angle correction amount stored in AWC-ECU. (Item No.1: Steering angle correction amount initialization Actuator Test Reference Table .)

OPERATION

AWC-ECU communicates with the steering wheel sensor via the CAN bus lines.

DTC SET CONDITIONS

The code is set when the signal sent from the steering wheel sensor cannot be received for a certain period.

PROBABLE CAUSES

- The CAN bus line is defective.
- Malfunction of steering wheel sensor
- Malfunction of AWC-ECU

DIAGNOSTIC PROCEDURE

STEP 1. Scan tool CAN bus diagnostics

Using scan tool MB991958, diagnose the CAN bus lines.

Q. Is the check result normal?

YES Go to Step 2.
NO Repair the CAN bus lines. CAN Bus Diagnostics Chart.)
STEP 2. Scan tool service data

Item No.11: Steering wheel sensor (Refer to service data reference table Data List Reference Table.)

Q. Is the check result normal?

YES Intermittent malfunction. How to Cope With Intermittent Malfunctions.)
NO Replace the steering wheel sensor. Service and Repair.) Then go to Step 3.
STEP 3. Check whether the DTC is reset.

Q. Is DTC No. U0126 set?

YES Replace the AWC-ECU. (Refer to Active Center Differential (ACD).) Then go to Step 4.
NO Intermittent malfunction. How to Cope With Intermittent Malfunctions.)
STEP 4. Check whether the DTC is reset.

Q. Is DTC No. U0126 set?

YES Return to Step 1.
NO This diagnosis is complete.