B1147

DTC B1147 LIN communication stop control

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

DIAGNOSTIC FUNCTION

When an error has occurred to the termination processing of LIN communication with the electric steering lock and the processing cannot be terminated normally, OSS-ECU sets the DTC B1147.

DTC SET CONDITION

Check Conditions

- At electric steering lock certification
Judgment Criterion

- LIN communication with the electric steering lock cannot be terminated normally.

TROUBLESHOOTING HINTS

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

DIAGNOSIS

STEP 1. Check of open circuit in PWR line between electric steering lock connector and battery.

Q. Is the check result normal?

YES Go to Step 2.
NO Repair the connector(s) or wiring harness.
STEP 2. Check of short to ground and open circuit in PCO line between electric steering lock connector and 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 selector lever assembly connector and 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?

YES Go to Step 3.
NO Repair the connector(s) or wiring harness.
STEP 3. Check of short to ground, short to power supply, and open circuit in LIN line between electric steering lock connector and OSS-ECU connector

Q. Is the check result normal?

YES Go to Step 4.
NO 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 DTC set?

YES Replace the electric steering lock and register the VIN (Refer to Programming and Relearning).
Then go to Step 5.
NO Intermittent malfunction is suspected How to Cope With Intermittent Malfunctions).
STEP 5. 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 The diagnosis is complete.