Code No. B1149 ESL drive circuit fail

caution

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

DIAGNOSTIC FUNCTION

When a short to power supply is detected in the electric steering lock driving circuit during the engine start or during travelling, OSS-ECU sets the diagnosis code No.B1149. At the same time, OSS-ECU displays the steering lock abnormality warning screen to the multi information display of the combination meter.

JUDGEMENT CRITERIA

Check Conditions

When all the following conditions are met.

Power supply mode: ON
Battery voltage: 8 V or more
During travelling (vehicle speed of 6 km/h or more) or engine is running (engine speed of 60 r/min or more)

Judgment Criterion

1 second or more has elapsed after the PCKM voltage is judged to be 3.5 V or more.

PROBABLE CAUSES

Damaged wiring harness or connector (short to power supply in PCK line)
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 (refer to

) 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 PCK 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. M.U.T.-III data list

Check the OSS-ECU data list.

Operation state	Item No.	Check item	Display
After starting the engine	9	ESL drive permission signal(KOS)	OFF
Other than above	9	ESL drive permission signal(KOS)	ON

OK: Operation state and data list display agree with each other.

Q. Is the check result normal?

	Go to Step 4.

	Replace the OSS-ECU and register the chassis number (Refer to )

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 )

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