Code No. B1143 ESL status fail


If a status error is received from the electric steering lock via LIN, OSS-ECU sets the diagnosis code No.B1143, and displays the immobiliser certification system inspection warning screen to the multi information display of the combination meter.
note In addition, when the electric steering lock was replaced, the diagnosis code No.B1143 may be set with the electric steering lock locked (a new electric steering lock is in the unlocked status). Therefore, before the diagnosis code recheck of after the replacement of electric steering lock, be sure to perform the locking control of the electric steering lock first.


Check Conditions
Judgment Criterion



STEP 1. After performing the locking and unlocking operations of the electric steering lock, recheck the diagnosis code.

Q. Is the diagnosis code set?

Replace the electric steering lock and register the chassis number (Refer to ). Then go to Step 2.
Go to Step 2.

STEP 2. Check whether the diagnosis code is reset.

Q. Is the diagnosis code set?

Replace the OSS-ECU and register the chassis number (Refer to ).
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).