DTC B1129

DTC B1129  : Driver's Door Lock Knob Switch Malfunction

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

DTC (Door Multiplex Control Unit)

1. Problem verification

   -1. Clear the DTCs with the HDS.

   -2. Operate the driver's door lock knob switch several times.

   -3. Check for DTCs with the HDS.

   DTC Description	DTC
   B1129 Driver's door lock knob switch malfunction

   Is DTC B1129 indicated?

   YES 

   Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time.

2. Determine possible failure area (driver's door latch, others)

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

   -2. Disconnect the following connector.

   Driver's door latch 10P connector

   -3. Check the parameter (s) below with the HDS.

   Signal	Current conditions
   	Values	Unit
   Driver's Door Lock Knob Switch (LOCK)
   Driver's Door Lock Knob Switch (UNLOCK)

   Is either information indicator ON?

   YES 

   Go to step 3.

   NO 

   Faulty driver's door lock knob switch; replace the driver's door latch.

3. Shorted wire check (DR SILCON UNLOCK, DR SILCON LOCK lines)

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

   -2. Disconnect the following connector.

   Power window master switch 37P connector

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

   Test condition	Vehicle OFF (LOCK) mode Driver's door latch 10P connector: disconnected Power window master switch 37P connector: disconnected
   Test point 1	Power window master switch 37P connector No. 20
   Test point 2	Body ground

   Test point 1	Power window master switch 37P connector No. 21
   Test point 2	Body ground

   Is there continuity?

   YES 

   Repair a short to ground in the wire.

   NO 

   The wires are not shorted to ground. Go to step 4.

4. Shorted wire check (DR SILCON UNLOCK line to DR SILCON LOCK line)

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

   Test condition	Vehicle OFF (LOCK) mode Driver's door latch 10P connector: disconnected Power window master switch 37P connector: disconnected
   Test point 1	Power window master switch 37P connector No. 20
   Test point 2	Power window master switch 37P connector No. 21

   Is there continuity?

   YES 

   Repair a short between the wires.

   NO 

   The DR SILCON UNLOCK and DR SILCON LOCK wires are OK. Replace the power window master switch .