S-AWC (Super All Wheel Control)

DTC U1417: Coding Data Malfunction

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 communication circuit is normal.
- When the diagnostic trouble code No. U1417 is set in AWC-ECU, the diagnostic trouble code may also be set in ETACS-ECU. When the diagnostic trouble code is set in ETACS-ECU, perform the diagnosis of the diagnostic trouble code for ETACS-ECU first.

OPERATION

AWC-ECU receives the vehicle information stored in ETACS-ECU via CAN bus lines.

DTC SET CONDITIONS

The code is set when the vehicle information received from ETACS-ECU is not correct.

PROBABLE CAUSES

- The CAN bus line is defective.
- Malfunction of the ETACS-ECU
- Malfunction of AWC-ECU
- ETACS-ECU has been interchanged between two vehicles.

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. ETACS-ECU coding data check

Using the scan tool, check if there is any abnormality to the coding data stored in the ETACS-ECU. Programming and Relearning.)

Q. Is the check result normal?

YES Go to Step 4.
NO Repair the coding data or replace ETACS-ECU. Electronic Time and Alarm Control System (ETACS) Then go to Step 5.
STEP 4. Check whether the DTC is reset.

Q. Is DTC No. U1417 set?

YES Replace the AWC-ECU.(Refer to Active Center Differential (ACD).) Then go to Step 5.
NO Intermittent malfunction. How to Cope With Intermittent Malfunctions.)
STEP 5. Check whether the DTC is reset.

Q. Is DTC No. U1417 set?

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