Code No.C1011: FL wheel speed sensor signal abnormal
Code No.C101C: FR wheel speed sensor signal abnormal
Code No.C1027: RL wheel speed sensor signal abnormal
Code No.C1032: RR wheel speed sensor signal 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.

OPERATION


4WD-ECU receives the wheel speed data from ABS/ASC-ECU via the CAN communication.

DIAGNOSIS CODE SET CONDITION


An irregular change in the wheel speed sensor is detected

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 stored again.

Q. Is the relevant wheel speed sensor diagnosis code No.C1011, C101C, C1027 or C1032 stored?
Go to Step 3
This diagnosis is complete.

STEP 3. M.U.T.-III other system diagnosis code.
Check the ABS diagnosis code (Refer to GROUP 35B - Troubleshooting ) <Vehicles with ABS> or the ASC diagnosis code (Refer to GROUP 35C - Troubleshooting ) <Vehicles with ASC>.

Q. Is the diagnosis code stored?
Diagnose the ABS-ECU or the ASC-ECU.(Refer to GROUP 35B - Troubleshooting ) <Vehicles with ABS> or (Refer to GROUP 35C - Troubleshooting ) <Vehicles with ASC>.
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 4WD-ECU (Refer to ).