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.

DTC Description
DTC
B12C7 Electric Steering Lock Motor Circuit Failure
  

1.
Problem verification:

Problem verification
?1.
Clear the DTCs with the HDS.


?2.
Do this procedure 10 times: Press the engine start/stop switch to select the OFF (LOCK), ACCESSORY, ON, and OFF (LOCK) mode.

?3.
Check for DTCs with the HDS.
DTC Description
DTC
B12C7 Electric Steering Lock Motor Circuit Failure
  

Is DTC B12C7 indicated?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for loose or poor connections.?
2.
Open wire check (GND line):

Open wire check (GND line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Electric steering lock 12P connector

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Electric steering lock 12P connector: disconnected
Test point 1
Electric steering lock 12P connector No. 7
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
The GND wire is OK. Go to step 3.
     
NO
     
     
     
Repair an open or high resistance in the ground wire or poor ground (G505).?
3.
Shorted wire check (MTR CUT1(CONT), MTR CUT2(IG1) lines):

Shorted wire check (MTR CUT1(CONT), MTR CUT2(IG1) lines)
?1.
Disconnect the following connector.
Body control module connector G (32P)

?2.
Check for continuity between test points 1 and 2 individually.
Test condition
Vehicle OFF (LOCK) mode
Electric steering lock 12P connector: disconnected
Body control module connector G (32P): disconnected
Test point 1
Electric steering lock 12P connector No. 2
Test point 2
Body ground

Test point 1
Electric steering lock 12P connector No. 4
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short to ground in the wire.?
     
NO
     
     
     
The MTR CUT1(CONT) and MTR CUT2(IG1) wires are not shorted. Go to step 4.
4.
Open wire check (MTR CUT1(CONT), MTR CUT2(IG1) lines):

Open wire check (MTR CUT1(CONT), MTR CUT2(IG1) lines)
?1.
Check for continuity between test points 1 and 2 respectively.
Test condition
Vehicle OFF (LOCK) mode
Electric steering lock 12P connector: disconnected
Body control module connector G (32P): disconnected
Test point 1
Body control module connector G (32P) No. 6
Test point 2
Electric steering lock 12P connector No. 2

Test point 1
Body control module connector G (32P) No. 7
Test point 2
Electric steering lock 12P connector No. 4


Is there continuity?

     
YES
     
     
     
The MTR CUT1(CONT) and MTR CUT2(IG1) wires are OK. Replace the steering lock. If the DTC is still present, replace the body control module.?
     
NO
     
     
     
Repair an open or high resistance in the wire.?