S-AWC (Super All Wheel Control)

Code No.C1011 [FL], C101C [FR], C1027 [RL], C1032 [RR]: Wheel Speed Sensor System (Faulty Signal)

CAUTION:

- If there is any problem in the CAN bus lines, an incorrect diagnostic trouble 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.

DIAGNOSTIC TROUBLE CODE SET CONDITIONS

When an irregular change in the wheel speed sensor is detected, the diagnostic trouble code of the relevant wheel speed sensor is set.

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. M.U.T.-III CAN bus diagnostics.

Use scan tool to perform the CAN bus diagnosis.

Q. Is the check result normal?

YES Go to Step 3.
NO Repair the CAN bus lines. CAN Bus Diagnostics Chart). After repairing the CAN bus line, go to Step 2.
STEP 2. Check whether the diagnostic trouble code is reset.

Q. Is the relevant wheel speed sensor diagnostic trouble code No.C1011 [FL], C101C [FR], C1027 [RL], or C1032 [RR] set?

YES Go to Step 3.
NO This diagnosis is complete.
STEP 3. M.U.T.-III diagnostic trouble code.

Check the ASC diagnostic trouble code. Active Stability Control System (ASC)).

Q. Is the diagnostic trouble code set?

YES Perform the relevant troubleshooting.
NO Go to Step 4.
STEP 4. M.U.T.-III data list.

Check the data list of the relevant wheel speed sensor. (Refer to Data List Reference Table).

- Item No.21: Wheel speed sensor [FL]

- Item No.22: Wheel speed sensor [FR]

- Item No.23: Wheel speed sensor [RL]

- Item No.24: Wheel speed sensor [RR]

Q. Is the check result normal?

YES Intermittent malfunction. How to Cope With Intermittent Malfunctions).
NO Replace the AWC-ECU. (Refer to AWC-ECU Removal and Installation).