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

DTC (Power Control Unit)

1. Problem verification

   -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.

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

   Is DTC B12C6 indicated?

   YES 

   Go to step 2 below.

   NO 

   Intermittent failure, the system is OK at this time. Check for loose or poor connections.

2. Keyless access control unit ESL SW line internal short 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 3 below.

   NO 

   Go to step  8

3. Keyless access control unit ESL SW line internal short 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 4 below.

   NO 

   Go to step  9

4. Keyless access control unit ESL SW line internal short 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 5 below.

   NO 

   Go to step  11

5. Shorted wire check (ESL SW C line) 1

   -1. Press the engine start/stop button to select the OFF mode.

   - 2. Disconnect the following connector.

   Electric steering lock 12P connector

   - 3. Check for continuity between test points 1 and 2.

   Test condition	OFF mode Electric steering lock 12P connector: disconnected
   Test circuit	ESL SW C
   Test point 1	Electric steering lock 12P connector No. 9 (PUR)
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Go to step  13

   NO 

   Go to step 6 below.

6. Shorted wire check (ESL SW D line) 1

   -1. Check for continuity between test points 1 and 2.

   Test circuit	ESL SW D
   Test point 1	Electric steering lock 12P connector No. 10 (LT GRN)
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Go to step 7 below.

   NO 

   Faulty electric steering lock, replace the steering lock .

7. Shorted wire check (ESL SW D line) 2

   -1. Press the engine start/stop button to select the OFF mode.

   - 2. Disconnect the following connector.

   Keyless access control unit connector C (24P)

   - 3. Check for continuity between test points 1 and 2.

   Test circuit	ESL SW D
   Test point 1	Electric steering lock 12P connector No. 10 (LT GRN)
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Repair a short to ground in the wire.

   NO 

   Replace the keyless access control unit .

8. Open wire check (GND line)

   -1. Press the engine start/stop button to select the OFF mode.

   - 2. Disconnect the following connector.

   Electric steering lock 12P connector

   - 3. Check for continuity between test points 1 and 2.

   Test condition

   ON mode

   Test circuit	GND
   Test point 1	Electric steering lock 12P connector No. 7 (BLK)
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Faulty electric steering lock, replace the steering lock .

   NO 

   Repair an open or high resistance in the ground wire or poor ground (G501).

9. Open wire check (ESL SW C line) 1

   -1. Press the engine start/stop button to select the OFF mode.

   - 2. Disconnect the following connector.

   Electric steering lock 12P connector

   - 3. Press the engine start/stop button to select the ON mode.

   - 4. Measure the voltage between test points 1 and 2.

   Test condition	ON mode
   Test circuit	ESL SW C
   Test point 1	Electric steering lock 12P connector No. 9 (PUR)
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there battery voltage?

   YES 

   Faulty electric steering lock, replace the steering lock .

   NO 

   Go to step 10 below.

10. Open wire check (ESL SW C line) 2

    -1. Check for continuity between test points 1 and 2.

    Test condition	ON mode Electric steering lock 12P connector: disconnected
    Test circuit	ESL SW C
    Test point 1	Electric steering lock 12P connector No. 9 (PUR)
    Test point 2	Power control unit connector C (24P) No. 15 (PUR)

    Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    Replace the keyless access control unit .

    NO 

    Repair an open or high resistance in the wire.

11. Open wire check (ESL SW D line) 1

    -1. Press the engine start/stop button to select the OFF mode.

    - 2. Disconnect the following connector.

    Electric steering lock 12P connector

    - 3. Press the engine start/stop button to select the ON mode.

    - 4. Measure the voltage between test points 1 and 2.

    Test condition	ON mode
    Test circuit	ESL SW D
    Test point 1	Electric steering lock 12P connector No. 10 (LT GRN)
    Test point 2	Body ground

    Courtesy of HONDA, U.S.A., INC.

    Is there battery voltage?

    YES 

    Faulty electric steering lock, replace the steering lock .

    NO 

    Go to step 12 below.

12. Open wire check (ESL SW D line) 2

    -1. Check for continuity between test points 1 and 2 respectively.

    Test condition	ON mode Electric steering lock 12P connector: disconnected
    Test circuit	ESL SW D
    Test point 1	Electric steering lock 12P connector No. 10 (LT GRN)
    Test point 2	Keyless access control unit connector C (24P) No. 17 (LT GRN)

    Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    Replace the keyless access control unit .

    NO 

    Repair an open or high resistance in the wire.

13. Short wire check (ESL SW D line) 2

    -1. Press the engine start/stop button to select the OFF mode.

    - 2. Disconnect the following connector.

    Keyless access control unit connector C (24P)

    - 3. Check for continuity between test points 1 and 2 respectively.

    Test condition	ON mode Electric steering lock 12P connector: disconnected
    Test circuit	ESL SW D
    Test point 1	Electric steering lock 12P connector No. 9 (PUR)
    Test point 2	Body ground

    Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    Repair a short to ground in the wire.

    NO 

    Replace the keyless access control unit .