Active Stability Control System (ASC)

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 Initial Inspection and Diagnostic Overview ).
- When another diagnostic trouble code for ASC-ECU is set, troubleshoot that diagnostic trouble code first.
- Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
- This diagnostic trouble code is set after ASC-ECU is swapped and the ignition switch is turned ON for the first time. However, on and after the second time, the diagnostic trouble code will not be set when ASC-ECU successfully receives the normal vehicle information from the engine control module.
- When the hydraulic unit (integrated with ASC-ECU) is replaced, always perform the calibration of steering wheel sensor, G and yaw rate sensor, brake fluid pressure sensor, cut valve, and inlet valve (Refer to G and Yaw Rate Sensor Calibration , Testing and Inspection , Master Cylinder Brake Fluid Pressure Sensor Calibration , and Testing and Inspection ).

CIRCUIT OPERATION

ASC-ECU receives vehicle information from the engine control module and stores it.

DTC SET CONDITIONS

This diagnostic trouble code is set when ASC-ECU cannot receive the vehicle information, after the ignition switch is turned ON, from the engine control module.

PROBABLE CAUSES

- Malfunction of the CAN bus
- Engine ECU malfunction
- ASC-ECU malfunction
- First ignition switch ON after replacement of ASC-ECU

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. Using scan tool MB991958, diagnose the CAN bus lines.

Using scan tool MB991958, diagnose the CAN bus lines.

Q. Is the check result normal?

YES Go to Step 3.
NO Repair the CAN bus lines CAN Bus Diagnostics Chart).
After repairing the CAN bus line, go to Step 2.
STEP 2. DTC recheck after repairing the CAN bus line

(1)Ignition switch "LOCK" (OFF)

(2)Ignition switch "ON"

Q. Is DTC C2203 set?

YES Go to Step 3.
NO The procedure is complete.
STEP 3. Scan tool diagnostic trouble code for other systems

Check if the engine control module sets a DTC Multiport Fuel Injection (MFI)).

Q. Is any DTC set?

YES Troubleshoot the diagnostic trouble code of engine control module Multiport Fuel Injection (MFI)). Then go to Step 5.
NO Go to Step 4.
STEP 4. Check whether the DTC is reset.

(1)Erase the DTC.

(2)Ignition switch: "LOCK" (OFF) position

(3)Ignition switch: "ON" position

Q. Is DTC C2203 set?

YES Replace the hydraulic unit (integrated with ASC-ECU) (Refer to Service and Repair). Then go to Step 5.
NO Intermittent malfunction How to Cope With Intermittent Malfunctions).
STEP 5. Check whether the DTC is reset.

(1)Erase the DTC.

(2)Ignition switch: "LOCK" (OFF) position

(3)Ignition switch: "ON" position

Q. Is DTC C2203 set?

YES Return to Step 1.
NO The procedure is complete.