B12C7
DTC Troubleshooting: B12C7
DTC B12C7:
Electric Steering Lock Motor 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. Do this procedure 10 times: Press the engine start/stop button to select the OFF, ACC, ON, and OFF mode.
3. Check for DTCs with the HDS.
Is DTC B12C7 indicated?
YES -
Go to step 4.
NO -
Intermittent failure, the system is OK at this time. Check for loose or poor connections.�
4. Disconnect the engine start/stop switch 10P connector.
5. Check for continuity between body ground and electric steering lock 12P connector terminal No. 12.
Is there continuity?
YES -
Go to step 6.
NO -
Repair an open or high resistance in the wire or poor ground (G405).�
6. Disconnect the electric steering lock 12P connector.
7. Disconnect power control unit connector C (36P).
8. Check for continuity between body ground and electric steering lock 12P connector terminals No. 3 and No. 5 individually.
Is there continuity?
YES -
Repair a short to ground in the wire.�
NO -
Go to step 9.
9. Check for continuity between power control unit connector C (36P) terminals No. 31 and No. 32, and electric steering lock 12P connector terminals No. 5 and No. 3 respectively.
Is there continuity?
YES -
Substitute a known-good power control unit. If the symptom goes away, replace the original power control unit. If not, replace the electric steering lock Service and Repair.�
NO -
Repair an open or high resistance in the wire.�