Code No. B1145 ESL drive circuit fail
Code No. B1152 ESL drive circuit fail(ESL)

caution When replacing the ECU, always check that the communication circuit is normal.


When an error is detected to the driving circuit of electric steering lock, OSS-ECU sets the diagnosis codes No.B1145 and No.B1152. At the same time, OSS-ECU displays the immobiliser certification system inspection warning screen to the multi information display of the combination meter.


Check Conditions
Judgment Criterion



STEP 1. M.U.T.-III other system diagnosis code

After turning the forced power supply output to "IG-ON" using the M.U.T.-III, check the diagnosis code of KOS-ECU.

Q. Is the diagnosis code set?

Diagnose the KOS. Refer to .
Go to Step 2.

STEP 2. Check of short to power supply, short of earth and open circuit in PCKM line between KOS-ECU connector and OSS-ECU connector

Q. Is the check result normal?

Go to Step 3.
Repair the connector(s) or wiring harness.

STEP 3. 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 4.
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

STEP 4. Check whether the diagnosis code is reset.

Q. Is the diagnosis code set?

Replace the OSS-ECU and register the chassis number (Refer to ).
The diagnosis is complete.