B1026

Control System DTCs

DTC Troubleshooting: B1026

DTC B1026 : Passenger's Door Lock Switch Malfunction


NOTE: Refer to the Electrical Wiring Diagrams for the location of the under-dash fuse/relay box connectors.

1. Problem verification (passenger's door lock switch in the neutral position):

-1. With the front passenger's door lock switch in the neutral position, check the parameter(s) below with the HDS.





Is either information indicator ON?
-YES- Go to step 4.
-NO- Go to step 2.

2. Problem verification (passenger's door lock switch in the lock position):

-1. With the front passenger's door lock switch in the lock position, check the parameter(s) below with the HDS.





Are both information indicators ON?
-YES- Go to step 3.
-NO- Intermittent failure, the system is OK at this time.

3. Shorted wire check (AS REMOTE SW LOCK to AS REMOTE SW UNLOCK line):

-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connector.





-3. Connect terminals A and B with a jumper wire.









-4. Check the parameter(s) below with the HDS.





Are both information indicators ON?
-YES- Repair a short between the wires.
-NO- The AS REMOTE SW LOCK to AS REMOTE SW UNLOCK wire is OK. Faulty door lock switch; replace the front passenger's power window switch Front Passengers Power Window Switch Removal And Installation.

4. Passenger's door lock switch check:

-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connector.





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





Is either information indicator ON?
-YES- Go to step 5.
-NO- Faulty door lock switch; replace the front passenger's power window switch Front Passengers Power Window Switch Removal And Installation.

5. Shorted wire check (AS REMOTE SW LOCK, AS REMOTE SW UNLOCK lines):

-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connector.





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














Is there continuity?
-YES- Repair a short to ground in the wire.
-NO- The AS REMOTE SW LOCK and AS REMOTE SW UNLOCK wires are OK. Faulty MICU; replace the under-dash fuse/relay box Under-Dash Fuse/Relay Box Removal and Installation.