B1148

DTC B1148 ESL power supply
DTC B1154 ESL power supply fail(ESL)

DIAGNOSTIC FUNCTION

When a short circuit (short to power supply) is detected in the power supply (microcomputer) circuit system of the electric steering lock, OSS-ECU sets the DTC B1148 and B1154. At the same time, OSS-ECU displays the steering lock abnormality warning screen to the multi information display of the combination meter. Also, when the DTC B1148 is the past trouble, the LIN bus may have a problem.

DTC SET CONDITION

Check Conditions

- At electric steering lock certification
Judgment Criterion

- Short circuit (short to power supply) in the power supply (microcomputer) circuit system of the electric steering lock is detected.

TROUBLESHOOTING HINTS

- Damaged harness wires and connectors
- Electric steering lock malfunction
- Malfunction of OSS-ECU
- LIN bus malfunction[ B1148 is the past trouble]

DIAGNOSIS

STEP 1. Check of short to power supply in PCO line between electric steering lock connector and OSS-ECU connector

Q. Is the check result normal?

YES Go to Step 2.
NO Repair the connector(s) or wiring harness.
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).
Then go to Step 3.
NO Go to Step 3.
STEP 3. Check whether the DTC is reset.

Q. Is the DTC set?

YES Replace the OSS-ECU and register the VIN (Refer to Programming and Relearning).
NO Intermittent malfunction is suspected How to Cope With Intermittent Malfunctions)