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DTC B1147 LIN communication stop control
 
 
cautionWhen 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 stores 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 HINT
  • 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 fusible link
noteBefore the wiring harness check, check the joint connector, ETACS-ECU, and repair if necessary.
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 ground, and open circuit in PCO line between electric steering lock connector and OSS-ECU connector
noteBecause 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 analog 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.)
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 ground, and open circuit in LIN line between electric steering lock connector and OSS-ECU connector
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 diagnostic trouble code.
(1) Erase the DTC.
(2) Turn the power supply mode of the engine switch from OFF to ON.
(3) Check if DTC is stored.
(4) Turn the power supply mode of the engine switch from ON to OFF.
Is the DTC stored?
Replace the electric steering lock and register the VIN (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. Recheck for diagnostic trouble code.
(1) Erase the DTC.
(2) Turn the power supply mode of the engine switch from OFF to ON.
(3) Check if DTC is stored.
(4) Turn the power supply mode of the engine switch from ON to OFF.
Is the DTC stored?
Replace the OSS-ECU and register the VIN (Refer to ).
The diagnosis is complete.