DIAGNOSTIC FUNCTION
When the OSS certification result is different from the engine status after the completion of engine starting permission communication, OSS-ECU determines that a problem has occurred, and sets the DTC B1A28. At the same time, OSS-ECU displays the immobilizer certification system inspection warning screen to the multi information display of the combination meter.
DIAGNOSIS
1. Using scan tool MB991958, diagnose the CAN bus line.
2. Checking whether OSS-ECU DTC B1161 is set
3. OSS-ECU DTC recheck