S-AWC (Super All Wheel Control)

DTC U0141: ETACS Time-out Error

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 communicates with the ETACS-ECU via the CAN bus lines.

DTC SET CONDITIONS

The code is set when the signal sent from the ETACS-ECU cannot be received for a certain period.

PROBABLE CAUSES

- The CAN bus line is defective.
- Malfunction of the ETACS-ECU
- Malfunction of AWC-ECU

DIAGNOSTIC PROCEDURE

STEP 1. Scan tool CAN bus diagnostics

Using scan tool MB991958, diagnose the CAN bus lines.

Q. Is the check result normal?

YES Go to Step 2.
NO Repair the CAN bus lines. CAN Bus Diagnostics Chart.)
STEP 2. Scan tool diagnostic trouble code

Check the ETACS diagnostic trouble code. Electronic Time and Alarm Control System (ETACS).)

Q. Is the DTC set?

YES Perform the relevant troubleshooting.
NO Go to Step 3.
STEP 3. Check whether the DTC is reset.

Q. Is DTC No. U0141 set?

YES Replace the AWC-ECU.(Refer to Active Center Differential (ACD).) Then go to Step 4.
NO Intermittent malfunction. How to Cope With Intermittent Malfunctions.)
STEP 4. Check whether the DTC is reset.

Q. Is DTC No. U0141 set?

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