Code No.U1427: Wheel Speed Sensor Data Malfunction


caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis 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.

OPERATION


AWC-ECU communicates with the ASC-ECU via the CAN bus lines.

DIAGNOSIS CODE SET CONDITIONS


The code is set when abnormality is detected in the wheel speed sensor signal received from the ASC-ECU.

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). After repairing the CAN bus line, go to Step 2.

STEP 2. M.U.T.-III diagnosis code.
Check the ASC diagnosis code. (Refer to GROUP 35C - Troubleshooting ).

Q. Is the diagnosis code set?
Perform the relevant troubleshooting.
Go to Step 3.

STEP 3. M.U.T.-III data list.
Check the data list of the relevant wheel speed sensor. (Refer to ).

  • Item No.18: FL wheel speed sensor
  • Item No.19: FR wheel speed sensor
  • Item No.20: RL wheel speed sensor
  • Item No.21: RR wheel speed sensor

Q. Is the check result normal?
Intermittent malfunction. (Refer to GROUP 00 - How to Cope with Intermittent Malfunction).
Go to Step 4.

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

Q. Is diagnosis code No.U1427 set?
Replace the AWC-ECU. (Refer to ). Then go to Step 5.
Intermittent malfunction. (Refer to GROUP 00 - How to Cope with Intermittent Malfunction).

STEP 5. Check whether the diagnosis code is set again.

Q. Is diagnosis code No.U1427 set?
Return to Step 1.
This diagnosis is complete.