B12C6

DTC Troubleshooting: B12C6

DTC B12C6: Electric Steering Lock Switch C/D Monitor Circuit Failure

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A. Troubleshooting - B-CAN System Diagnosis Test Mode A

1. Clear the DTCs with the HDS.

2. Press the engine start/stop button at least 10 times.

3. Check for DTCs with the HDS.

Is DTC B12C6 indicated?
YES - Go to step 4.

NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections.


4. Measure the voltage between body ground and electric steering lock 12P connector terminal No. 12.

Is there less than 0.2 V?
YES - Go to step 5.

NO - Repair open in the wire or poor ground (G405).






5. Disconnect the electric steering lock 12P connector.

6. Disconnect power control unit connector C (36P).

7. Check for continuity between body ground and electric steering lock 12P connector terminals No. 9 and No. 10 individually.

Is there continuity?
YES - Repair short to ground in the wire.

NO - Go to step 8.






8. Check for continuity between power control unit connector C (36P) terminals No. 29 and No. 30, and electric steering lock 12P connector terminals No. 10 and No. 9 individually.

Is there continuity?
YES - Go to step 9.

NO - Repair open in the wire.






9. Reconnect power control unit connector C (36P).

10. Select PCU from the ONE-PUSH START SYSTEM system select menu with the HDS, and enter DATA LIST.

11. Check each PCU value with the DATA LIST menu.

12. Connect the jumper wires to body ground and to electric steering control unit 12P connector terminals No. 10 and No. 9.





Are all data list values correct?
YES - Replace the electric steering lock. Steering Lock Replacement (Without Keyless Access System)

NO - Replace the power control unit. Testing and Inspection