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.

DIAGNOSTIC FUNCTION



JUDGEMENT CRITERIA


Check Conditions
  • At electric steering lock certification
Judgment Criterion
  • Abnormal signal is received from the electric steering lock.

PROBABLE CAUSES



  • Damaged wiring harness or connector (open circuit or short to earth in PCK line)
  • Electric steering lock malfunction
  • Malfunction of KOS-ECU
  • Malfunction of OSS-ECU

DIAGNOSIS PROCEDURE

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.