B1139

DTC B1139 KOS authenticate time-out

DIAGNOSTIC FUNCTION

If the necessary data cannot be received from KOS-ECU via CAN during the certification communication with KOS-ECU, OSS-ECU sets the DTC B1139, and displays the immobilizer certification system inspection warning screen to the multi information display of the combination meter.

DTC SET CONDITION

Check Conditions

- At KOS-ECU certification
Judgment Criterion

- During the certification communication with KOS-ECU, the necessary data cannot be received from KOS-ECU via CAN.

TROUBLESHOOTING HINTS

- Malfunction of the CAN bus line
- Malfunction of KOS-ECU
- Malfunction of OSS-ECU

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 diagnosis code check (after turning the forced power supply output to "IG-ON"
using the scan tool MB991958)
3. OSS-ECU DYC recheck