S-AWC

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.

STEP 2. Scan tool diagnostic trouble code
Check the ETACS diagnostic trouble code. (Diagnostic Trouble Code Descriptions)
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. (How to Perform Vehicle Identification Number (VIN) Writing)
Q: Is the check result normal?
YES: Go to Step 4.
NO: Repair the coding data or replace ETACS-ECU. Then go to Step 5.

STEP 4. Check whether the DTC is reset.
Q: Is DTC No. U1417 set?
YES: Replace the AWC-ECU. Then go to Step 5.
NO: Intermittent malfunction.

STEP 5. Check whether the DTC is reset.
Q: Is DTC No. U1417 set?
YES: Return to Step 1.
NO: This diagnosis is complete.