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DTC U0428: Steering Wheel Sensor Data Malfunction
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect DTC 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 GROUP 35C - On-vehicle Service ), and reset the steering wheel sensor correction amount stored in the AWC-ECU (Item No. 1: Steering angle adjusted value ).
 
 
OPERATION
AWC-ECU communicates with the steering wheel sensor via the CAN bus lines.
 
 
DTC SET CONDITIONS
The DTC is set when abnormality is detected in the signal received from the steering wheel sensor.
 
 
PROBABLE CAUSES
  • Malfunction of the CAN bus line
  • Malfunction of the steering wheel sensor
  • Malfunction of AWC-ECU

 
 
DIAGNOSIS
STEP 1. Scan tool (M.U.T.-IIISE) CAN bus diagnostics.
Use scan tool (M.U.T.-IIISE) to perform the CAN bus diagnosis.
Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - Diagnosis, Can Bus Diagnostics Table ).
 
STEP 2. Scan tool (M.U.T.-IIISE) data list.
Item No.21: Steering angle (refer to ).
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 DTC is set again.
Is the DTC U0428 set?
Replace the AWC-ECU (Refer to ).
This diagnosis is complete.