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.

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

1.
Problem verification:

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


?2.
Press the engine start/stop switch at least ten times.

?3.
Check for DTCs with the HDS.
DTC Description
DTC
B12C6 Electric Steering Lock Switch C/D Monitor Circuit Failure
  

Is DTC B12C6 indicated?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for loose or poor connections.?
2.
ESL SW line check 1:

ESL SW line check 1
?1.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
Electrical Steering Lock SWITCH C
OFF
      
Electrical Steering Lock SWITCH D
OFF
      

Are ELECTRICAL STEERING LOCK SWITCH C and ELECTRICAL STEERING LOCK SWITCH D data list values OFF?

     
YES
     
     
     
Go to step 9.
     
NO
     
     
     
Go to step 3.
3.
ESL SW line check 2:

ESL SW line check 2
?1.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
Electrical Steering Lock SWITCH C
OFF
      
Electrical Steering Lock SWITCH D
OFF
      

Are ELECTRICAL STEERING LOCK SWITCH C data list value OFF?

     
YES
     
     
     
Go to step 10.
     
NO
     
     
     
Go to step 4.
4.
ESL SW line check 3:

ESL SW line check 3
?1.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
Electrical Steering Lock SWITCH C
OFF
      
Electrical Steering Lock SWITCH D
OFF
      

Are ELECTRICAL STEERING LOCK SWITCH D data list value OFF?

     
YES
     
     
     
Go to step 12.
     
NO
     
     
     
Go to step 5.
5.
Shorted wire check (ESL SW C line) 1:

Shorted wire check (ESL SW C line) 1
?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 (female terminals) No. 9:
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Go to step 6.
     
NO
     
     
     
Go to step 7.
6.
Shorted wire check (ESL SW C line) 2:

Shorted wire check (ESL SW C line) 2
?1.
Disconnect the following connector.
Body control module connector G (32P)

?2.
Check for continuity between test points 1 and 2.
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 (female terminals) No. 9:
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short to ground in the wire.?
     
NO
     
     
     
The ESL SW C wire is OK. Replace the body control module.?
7.
Shorted wire check (ESL SW D line) 1:

Shorted wire check (ESL SW D line) 1
?1.
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 (female terminals) No. 10:
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Go to step 8.
     
NO
     
     
     
The ESL SW D wire is OK. Replace the electric steering lock.?
8.
Shorted wire check (ESL SW D line) 2:

Shorted wire check (ESL SW D line) 2
?1.
Disconnect the following connector.
Body control module connector G (32P)

?2.
Check for continuity between test points 1 and 2.
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 (female terminals) No. 10:
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short to ground in the wire.?
     
NO
     
     
     
The ESL SW D wire is OK. Replace the body control module.?
9.
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 (female terminals) No. 7:
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
     
NO
     
     
     
Repair an open or high resistance in the ground wire or poor ground (G401).?
10.
Open wire check (ESL SW C line) 1:

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

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

?3.
Turn the vehicle to the ON mode.

?4.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
Electric steering lock 12P connector: disconnected
Test point 1
Electric steering lock 12P connector (female terminals) No. 9:
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
The ESL SW C wire is OK. Replace the electric steering lock.?
     
NO
     
     
     
Go to step 11.
11.
Open wire check (ESL SW C line) 2:

Open wire check (ESL SW C line) 2
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Body control module connector G (32P)

?3.
Check for continuity between test points 1 and 2.
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 (female terminals) No. 9:
Test point 2
Body control module connector G (32P) No. 4


Is there continuity?

     
YES
     
     
     
The ESL SW C wire is OK. Replace the body control module.?
     
NO
     
     
     
Repair an open or high resistance in the wire.?
12.
Open wire check (ESL SW D line) 1:

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

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

?3.
Turn the vehicle to the ON mode.

?4.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
Electric steering lock 12P connector: disconnected
Test point 1
Electric steering lock 12P connector (female terminals) No. 10:
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
The ESL SW D wire is OK. Replace the electric steering lock.?
     
NO
     
     
     
Go to step 13.
13.
Open wire check (ESL SW D line) 2:

Open wire check (ESL SW D line) 2
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Body control module connector G (32P)

?3.
Check for continuity between test points 1 and 2.
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 (female terminals) No. 10:
Test point 2
Body control module connector G (32P) No. 5


Is there continuity?

     
YES
     
     
     
The ESL SW D wire is OK. Replace the body control module.?
     
NO
     
     
     
Repair an open or high resistance in the wire.?