Code No. B1147 LIN communication stop control


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

DIAGNOSTIC FUNCTION



JUDGEMENT CRITERIA


Check Conditions
  • At electric steering lock certification
Judgment Criterion
  • LIN communication with the electric steering lock cannot be terminated normally.

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 OSS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check of open circuit in PWR line between electric steering lock connector and fusible link
note Before the wiring harness check, check the joint connector, ETACS-ECU, and repair if necessary.

Q. Is the check result normal?
Go to Step 2.
Repair the connector(s) or wiring harness.

STEP 2. Check of short to power supply, short to earth, 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?
Go to Step 3.
Repair the connector(s) or wiring harness.

STEP 3. Check of short to power supply, short to earth, and open circuit in LIN line between electric steering lock connector and 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 reset.

Q. Is the diagnosis code set?
Replace the OSS-ECU and register the chassis number (Refer to ).
The diagnosis is complete.