Code No. B1141 ESL authentification timeout

caution

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

DIAGNOSTIC FUNCTION

If the necessary data cannot be received from the electric steering lock via LIN during the certification communication with electric steering lock, KOS&OSS-ECU sets diagnosis code No.B1141, and displays the immobilizer certification system inspection warning to the combination meter.

JUDGEMENT CRITERIA

Check Conditions

At electric steering lock certification

Judgement Criterion

During the certification communication with electric steering lock, the necessary data cannot be received from the electric steering lock via LIN.

PROBABLE CAUSES

LIN bus line malfunction (open circuit, short to earth, or short to power supply in LIN line)
Damaged wiring harness or connector (open circuit or short to earth in PCO line, or open circuit in PWR line)
Electric steering lock malfunction
Malfunction of KOS&OSS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check of open circuit in PWR line between electric steering lock connector and relay box (fuse) connector

Q. Is the check result normal?

Go to Step 2.

Repair the connector(s) or wiring harness.

STEP 2. Check of short to earth or open circuit in PCO line between electric steering lock connector and KOS&OSS-ECU connector

note

Because the conformity cannot be determined even when the digital tester is used to measure the voltage of PCO line between the electric steering lock connector and KOS&OSS-ECU connector, be sure to use the analogue tester (With the keyless operation key placed outside of the vehicle, if the tester needle swings to the battery voltage when the engine switch is operated, it is judged normal.).

Q. Is the check result normal?

Go to Step 3.

Repair the connector(s) or wiring harness.

STEP 3. Check of short to earth, short to power supply or open circuit in LIN line between electric steering lock connector and KOS&OSS-ECU connector

Q. Is the check result normal?

Go to Step 4.

Repair the connector(s) or wiring harness.

STEP 4. 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 5.

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

STEP 5. 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

The diagnosis is complete.