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, short to earth or open circuit is detected in the electric steering lock, KOS&OSS-ECU sets diagnosis code No.B1149. At the same time, KOS&OSS-ECU displays the steering lock abnormality warning to the combination meter.

JUDGEMENT CRITERIA


Check Conditions
Judgement Criterion

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Voltage measurement at KOS&OSS-ECU connector (PCK terminal)


(1)Check at the KOS&OSS-ECU connector energised side.
(2)Power supply mode: "OFF"
(3)Measure the voltage between the KOS&OSS-ECU connector (PCK terminal) and body earth.
OK: more than 4 V
note If the engine can be started, check that the PCK terminal voltage while the engine is being started is 1V or less.

Q. Is the check result normal?

Go to Step 3.

Go to Step 2.

STEP 2. Check of short to power supply, short to earth or open circuit in PCK line between the electric steering lock connector and KOS&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.

The diagnosis is complete.

STEP 4. Check whether the diagnosis code is set again.


Q. Is the diagnosis code set?

Replace the KOS&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 ).