Active Center Differential (ACD)

DTC C2203: VIN not Recorded

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 chassis number information from the engine control module.

DTC SET CONDITIONS
When the chassis number is not written. (AWC-ECU receives chassis number information from the engine control module via CAN, and writes to AWC-ECU.)

PROBABLE CAUSES
^ The CAN bus line is defective.
^ Malfunction of engine control module
^ VIN not written
^ Malfunction of AWC-ECU

DIAGNOSIS

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. (Refer to Troubleshooting CAN Bus Diagnostics Table). After repairing the CAN bus line, go to Step 2.

STEP 2. Scan tool diagnostic trouble code
Check whether engine. related diagnostic trouble code No. P0630 is set. (Refer to Troubleshooting Diagnostic Trouble Code Descriptions).
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. C2203 set?
YES: Replace the AWC-ECU. Then go to Step 4.
NO: Intermittent malfunction. (Refer to How to Cope with Intermittent Malfunction How to Use Troubleshooting/Inspection Service Points).

STEP 4. Check whether the DTC is reset.
Q: Is DTC No. C2203 set?
YES: Return to Step 1.
NO: This diagnosis is complete.