DTC B1075

DTC B1075  : Headlight Switch Malfunction

NOTE:  If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .

DTC (Power Distribution Module)

1. Problem verification

   -1. Clear the DTCs with the HDS.

   -2. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

   -3. Wait for at least 6 seconds.

   -4. Turn the headlight switch ON position, and wait for at least 6 seconds.

   -5. Check for DTCs with the HDS.

   DTC Description	DTC
   B1075 Headlight Switch Malfunction

   Is DTC B1075 indicated?

   YES 

   Go to step 2.

   NO 

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

2. DTC check

   -1. Check for body control module DTCs with the HDS.

   Body Control Module 

   DTC Description	DTC
   B1275 Headlight OFF Position Circuit Malfunction
   B1276 Headlight Switch PARKING Position Circuit Malfunction
   B1277 Headlight AUTO Position Circuit Malfunction
   B1278 Headlight ON Position Circuit Malfunction
   B1279 Dimmer Switch Circuit Malfunction

   Are any DTCs indicated?

   YES 

   Go to indicated DTCs troubleshooting.

   NO 

   Go to step 3.

3. Shorted wire check (BACK UP H/L line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connectors.

   Body control module connector B (36P)Power distribution module connector B (14P)

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

   Test condition	Vehicle OFF (LOCK) mode Body control module connector B (36P): disconnected Power distribution module connector B (14P): disconnected
   Test point 1	Body control module connector B (36P) No. 24
   Test point 2	Body ground

   Is there continuity?

   YES 

   Repair a short to ground in the wire.

   NO 

   Go to step 4.

4. Open wire check (BACK UP H/L line)

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

   Test condition	Vehicle OFF (LOCK) mode Body control module connector B (36P): disconnected Power distribution module connector B (14P): disconnected
   Test point 1	Body control module connector B (36P) No. 24
   Test point 2	Power distribution module connector B (14P) No. 2

   Is there continuity?

   YES 

   Go to step 5.

   NO 

   Repair an open or high resistance in the wire.

5. Body control module check

   -1. Reconnect the following connector.

   Power distribution module connector B (14P)

   -2. Turn the vehicle to the ON mode.

   -3. Turn the headlight switch ON position.

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

   Test condition	Vehicle ON mode Body control module connector B (36P): disconnected
   Test point 1	Body control module connector B (36P) No. 24
   Test point 2	Body ground

   Is there battery voltage?

   YES 

   Replace the body control module .

   NO 

   Replace the power distribution module .