S-AWC (Super All Wheel Control)

Code No.U0001: Bus-Off

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.

DIAGNOSTIC TROUBLE CODE SET CONDITIONS

The code is set when AWC-ECU ceases (bus-off).

PROBABLE CAUSES

- The CAN bus line is defective.

- Malfunction of AWC-ECU

- ECU malfunction of other system

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 2.
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 diagnostic trouble code No.U0001 set?

YES Replace the AWC-ECU. (Refer to AWC-ECU Removal and Installation). Then go to Step 3.
NO Intermittent malfunction. How to Cope With Intermittent Malfunctions).
STEP 3. Check whether the diagnostic trouble code is reset.

Q. Is diagnostic trouble code No.U0001 set?

YES Return to Step 1.
NO This diagnosis is complete.