Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

1. CHECK BACK DOOR SWITCH INPUT SIGNAL 
   1. Turn ignition switch OFF.
   2. Disconnect back door lock assembly connector.
   3. Check signal between back door lock assembly harness connector and ground using oscilloscope.

      (+)		(-)	Signal (Reference value)
      Back door lock assembly
      Connector	Terminal
      D557	7	Ground	9.0 - 10.0 V

      Is the inspection result normal? 

      YES: GO TO  3.

      NO: GO TO 2.

2. CHECK BACK DOOR SWITCH CIRCUIT 
   1. Disconnect BCM connector.
   2. Check continuity between back door lock assembly harness connector and BCM harness connector.

      Back door lock assembly		BCM		Continuity
      Connector	Terminal	Connector	Terminal
      D557	7	M20	97	Yes

   3. Check continuity between back door lock assembly harness connector and ground.

      Back door lock assembly		Ground	Continuity
      Connector	Terminal
      D557	7		No

      Is the inspection result normal? 

      YES: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair or replace harness.

3. CHECK BACK DOOR SWITCH GROUND CIRCUIT 

   Check continuity between back door lock assembly harness connector and ground.

   Back door lock assembly		Ground	Continuity
   Connector	Terminal
   D557	8		Yes

   Is the inspection result normal? 

   YES: GO TO 4.

   NO: Repair or replace harness.

4. CHECK BACK DOOR SWITCH 

   Refer to "COMPONENT INSPECTION ".

   Is the inspection result normal? 

   YES: GO TO 5.

   NO: Replace back door lock assembly. Refer to "DOOR LOCK: REMOVAL AND INSTALLATION ".

5. CHECK INTERMITTENT INCIDENT 

   Refer to "INTERMITTENT INCIDENT ".

   : Inspection End.