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DTC C1011: FL Wheel Speed Sensor Signal
DTC C101C: FR Wheel Speed Sensor Signal
DTC C1027: RL Wheel Speed Sensor Signal
DTC C1032: RR Wheel Speed Sensor Signal
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect DTC 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
AWC-ECU receives the wheel speed data from ASC-ECU via the CAN communication.
 
 
DTC SET CONDITION
This DTC is stored when the abnormality below is detected:
  • An irregular change in the wheel speed sensor is detected
 
 
PROBABLE CAUSES
  • Malfunction of wheel speed sensor
  • Damaged harness wires and connectors
  • Malfunction of encoder for wheel speed detection
  • Malfunction of ASC-ECU
  • Malfunction of AWC-ECU

 
 
DIAGNOSTIC PROCEDURE
STEP 1. Scan tool (M.U.T.-III) CAN bus diagnostics.
Use scan tool (M.U.T.-III) to perform the CAN bus diagnosis.
Is the check result normal?
Go to Step 3.
Repair the CAN bus lines (Refer to GROUP 54C - Diagnosis, Can Bus Diagnostics Table ). After repairing the CAN bus line, go to Step 2.
 
STEP 2. Check whether the DTC is stored again.
Is the relevant wheel speed sensor DTC No.C1011 <FL>, C101C <FR>, C1027 <RL>, or C1032 <RR> stored?
Go to Step 3.
This diagnosis is complete.
 
STEP 3. Scan tool (M.U.T.-III) other system DTC.
Check the ASC DTC (Refer to GROUP 35C - Diagnosis, Diagnostic Trouble Code Chart ).
Is the DTC stored?
Perform the relevant troubleshooting.
Go to Step 4.
 
STEP 4. Scan tool (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
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the AWC-ECU (Refer to ).