ABS

DTC C2203: VIN not recorded

CAUTION
^ If there is any problem in the CAN bus lines, an incorrect DTC may be set. Prior to this diagnosis, diagnose the CAN bus lines.
^ When other DTC for ABS-ECU is set, troubleshoot that DTC first.

CIRCUIT OPERATION
ABS-ECU receives vehicle information from the engine ECU and stores it.

DTC SET CONDITIONS
This DTC is set when ABS-ECU cannot receive the vehicle information number from the engine-ECU.

PROBABLE CAUSES
^ Malfunction of the CAN bus
^ Engine ECU malfunction
^ ABS-ECU malfunction
^ When the ignition switch is turned to the "ON" position for the first time after the ABS-ECU is replaced.

DIAGNOSIS

Required Special Tools:
^ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
^ MB991824: Vehicle Communication Interface (V.C.I.)
^ MB991827: M.U.T.-III USB Cable
^ MB991910: M.U.T.-III Main Harness A

STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.

Q: Is the check result normal?
YES: Go to Step 3.
NO: Repair the CAN bus lines. On completion, go to Step 2.

STEP 2. DTC recheck after resetting CAN bus lines

Q: Is DTC C2203 set?
YES: Go to Step 3.
NO: The procedure is complete.

STEP 3. M.U.T.-III DTC
Check that the engine-ECU sets a DTC.

Q: Is any DTC set?
YES: Troubleshoot the engine ECU DTC. Then go to Step 5.
NO: Go to Step 4.

STEP 4. Check whether the DTC is reset.

Q: Is DTC C2203 set?
YES: Replace the hydraulic unit (ABS-ECU). Then go to Step 5.
NO: If a trouble is solved, it is determined that there is an intermittent malfunction such as poor engaged connector(s) or open circuit.

STEP 5. Check whether the DTC is reset.

Q: Is DTC C2203 set?
YES: Return to Step 1.
NO: The procedure is complete.