1.CHECK DOOR LOCK AND UNLOCK SWITCH INPUT SIGNAL

1. Turn ignition switch OFF.
2. Disconnect power window main switch (door lock and unlock switch) connectors.
3. Check signal between power window main switch (door lock and unlock switch) harness connector and ground using oscilloscope.

   (+) | (–) | Signal (Reference value)
   Power window main switch (door lock and unlock switch)
   Connector | Terminal
   D8 | 5 | Ground |
   13

Is the inspection result normal?
YES>>GO TO 3.
NO>>GO TO 2.
2.CHECK DOOR LOCK AND UNLOCK SWITCH CIRCUIT

1. Disconnect BCM connector.
2. Check continuity between BCM harness connector and power window main switch (door lock and unlock switch) harness connector.

   BCM | Power window main switch (door lock and unlock switch) | Continuity
   Connector | Terminal | Connector | Terminal
   M123 | 128 | D8 | 5 | Existed
   131 | 13

3. Check continuity between BCM harness connector and ground.

   BCM | Ground | Continuity
   Connector | Terminal
   M123 | 128 | Not existed
   131

Is the inspection result normal?
YES>>Replace BCM. Refer to Removal and Installation.
NO>>Repair or replace harness.
3.CHECK DOOR LOCK AND UNLOCK SWITCH GROUND
Check continuity between power window main switch (door lock and unlock switch) harness connector and ground.

Power window main switch (door lock and unlock switch) | Ground | Continuity
Connector | Terminal
D8 | 8 | Existed

Is the inspection result normal?
YES>>GO TO 4.
NO>>Repair or replace harness.
4.CHECK DOOR LOCK AND UNLOCK SWITCH
Refer to Component Inspection.
Is the inspection result normal?
YES>>GO TO 5.
NO>>Replace power window main switch (door lock and unlock switch). Refer to Removal and Installation.
5.CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident.
>>INSPECTION END