B1140

DTC B1140 KOS authenticate error

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.

DTC SET CONDITION

Check Conditions

- At KOS-ECU certification (at transition of power supply mode from OFF to ACC)
Judgment Criterion

- As a result of the certification communication with KOS-ECU, OSS-ECU receives the abnormal data from KOS-ECU.

TROUBLESHOOTING HINTS

- KOS-ECU malfunction (KOS-ECU has been interchanged between two vehicles, or various registrations are not complete after KOS-ECU replacement)
- Malfunction of the CAN bus line
- 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-ECU diagnosis code check (after turning the forced power supply output to "IG-ON"
using the scan tool MB991958)
3. OSS-ECU DTC recheck