Code No. C100A: FL Wheel Speed Sensor System (Faulty Circuit)
Code No. C1015: FR Wheel Speed Sensor System (Faulty Circuit)
Code No. C1020: RL Wheel Speed Sensor System (Faulty Circuit)
Code No. C102B: RR Wheel Speed Sensor System (Faulty Circuit)


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 receives the wheel speed data from ASC-ECU via the CAN communication.

DIAGNOSIS CODE SET CONDITIONS


Observe the wheel speed at startup. If one or more of the wheel speed does not follow, the diagnosis code of the relevant wheel speed sensor is set.

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 3.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting). After repairing the CAN bus line, go to Step 2.

STEP 2. Check whether the diagnosis code is set again.

Q. Is the relevant wheel speed sensor code No.C100A <FL>, C1015 <FR>, C1020 <RL>, or C102B <RR> set?
Go to Step 3.
This diagnosis is complete.

STEP 3. M.U.T.-III other system 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 4.

STEP 4. 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).
Replace the AWC-ECU (Refer to ).