Wireless Control Module
DTC B2204: Coding data mismatchDTC SET CONDITION
WCM sets the DTC B2204 when the vehicle information data on the CAN line does not match the vehicle information data registered in WCM.
TECHNICAL DESCRIPTION (COMMENT)
WCM determines that the abnormality is present when the vehicle information registered in it does not match the vehicle information data.
TROUBLESHOOTING HINTS
- Malfunction of WCM.
- Malfunction of ETACS-ECU.
DIAGNOSTIC PROCEDURE
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
CAUTION: To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Diagnose the CAN bus line.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?
YES : Go to Step 2.
NO : Repair the CAN bus line.
STEP 2. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code Check again if the DTC is set to the ETACS-ECU.
Q: Is the DTC set?
YES : Troubleshoot the ETACS.
NO : Go to Step 3.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the WCM.
1. Erase the DTC.
2. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
3. Check if DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?
YES : Replace WCM and register the ID codes.
NO : The trouble can be an intermittent malfunction (Refer to General (Body and Chassis) - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction).