DTC B12C6: Electric Steering Lock Switch C/D Monitor Circuit Failure
WARNING: This page is about a different car, the 2010 Acura TL and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A
).
- Clear the DTCs with the HDS.
- Press the engine start/stop button at least 10 times.
- 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.
- Measure the voltage between body ground and electric steering lock 12P connector terminal No. 12.Fig 1: Measuring Voltage Between Electric Steering Lock 12P Connector Terminal No. 12 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there less than 0.2 V?
YES -Go to step 5.
NO -Repair an open or high resistance in the wire or poor ground (G405).
- Disconnect the electric steering lock 12P connector.
- Disconnect power control unit connector C (36P).
- Check for continuity between body ground and electric steering lock 12P connector terminals No. 9 and No. 10 individually.Fig 2: Checking Continuity Between Body Ground And Electric Steering Lock 12P Connector Terminals No. 9 And No. 10
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Repair a short to ground in the wire.
NO -Go to step 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 respectively.Fig 3: Checking Continuity Between Power Control Unit Connector C (36P) Terminals And Electric Steering Lock 12P Connector Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Go to step 9.
NO -Repair an open or high resistance in the wire.
- Reconnect power control unit connector C (36P).
- Select PCU from the ONE-PUSH START system select menu with the HDS, and enter DATA LIST.
- Check each PCU value with the DATA LIST menu.
- Connect the jumper wires to body ground and to electric steering control unit 12P connector terminals No. 10 and No. 9.DATA LIST REFERENCE CHART
Data List Value ESL SWITCH C ON ESL SWITCH D ON Are all data list values correct?
YES -Replace the electric steering lock (see STEERING LOCK REPLACEMENT ).
NO -Replace the power control unit (see POWER CONTROL UNIT ).