B1142

DTC B1142 ESL authenticate error
DTC B1151 OSS authenticate time-out(ESL)

DIAGNOSTIC FUNCTION

If the electric steering lock receives any abnormal data from OSS-ECU as a result of the certification communication with electric steering lock, OSS-ECU sets the DTC B1142 and No.B1151.
At the same time, OSS-ECU displays the immobilizer certification system inspection warning screen to the multi information display of the combination meter.

DTC SET CONDITION

Check Conditions

- At electric steering lock certification
Judgment Criterion

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

TROUBLESHOOTING HINTS

- Electric steering lock malfunction (electric steering lock has been interchanged between two vehicles)
- OSS-ECU malfunction (OSS-ECU has been interchanged between two vehicles)

DIAGNOSIS

STEP 1. After turning the forced power supply output to "IG-ON"
using the scan tool MB991958, check if the DTC B1161 is set.

Q. Is the DTC set?

YES Carry out the troubleshooting for the DTC B1161. Refer to B1161.
NO Go to Step 2.
STEP 2. After performing the locking and unlocking operations of the electric steering lock, recheck the DTC.

Q. Is the DTC set?

YES Replace the electric steering lock and register the VIN (Refer to Programming and Relearning).
NO Intermittent malfunction is suspected How to Cope With Intermittent Malfunctions).