DIAGNOSTIC FUNCTION
If any abnormal data is received from KOS-ECU as a result of the certification communication with KOS-ECU, OSS-ECU sets the DTC B1140, and 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. (after turning the forced power supply output to "IG-ON" using the scan tool MB991958)
2. KOS-ECU diagnostic trouble code check (after turning the forced power supply output to "IG-ON" using the scan tool MB991958)
3. OSS-ECU DTC recheck