Code No.U0428: Steering wheel sensor CAN data abnormal


caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be stored. 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 GROUP 35C - On-vehicle Service ), and reset the steering wheel sensor correction amount stored in the 4WD-ECU. (Item No. 1: SAS adjusted value ).

OPERATION


The steering wheel sensor send the signal to the 4WD-ECU via the CAN bus lines.

DIAGNOSIS CODE SET CONDITION


This diagnosis code will be stored when the steering wheel sensor sends an abnormal signal.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics.
Use M.U.T.-III to perform the CAN bus diagnosis.

Q. Is the check result normal?
Go to Step 2
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting ). Then go to Step 4.

STEP 2. M.U.T.-III data list.
Check the following data list (Refer to ).

  • Item No.8: Steering angle sensor

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the steering wheel sensor (Refer to GROUP 35C - Steering Wheel Sensor ). Then go to Step 3.

STEP 3. Check whether the diagnosis code is stored again.

Q. Is diagnosis code No.U0428 stored?
Replace the 4WD-ECU (Refer to ). Then go to Step 4.
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

STEP 4. Check whether the diagnosis code is stored again.

Q. Is diagnosis code No.U0428 stored?
Return to Step 1.
This diagnosis is complete.