Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

1. CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN
   
   
   1. Turn ignition switch OFF.
   2. Disconnect BCM connector M18 and combination switch connector.
   3. Check continuity between BCM connector M18 and combination switch connector M28.

      Combination switch signal	BCM		Combination switch		Continuity
      	Connector	Terminal	Connector	Terminal
      INPUT 1	M18	38	M28	8	Yes
      INPUT 2		39		6
      INPUT 3		36		5
      INPUT 4		37		3
      INPUT 5		33		1

   Is the inspection result normal?

   YES 

   GO TO STEP 2. 

   NO 

   Repair or replace harness or connectors.

2. CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR SHORT
   
   

   Check continuity between BCM connector M18 and ground.

   Combination switch signal	BCM		Ground	Continuity
   	Connector	Terminal
   INPUT 1	M18	38		No
   INPUT 2		39
   INPUT 3		36
   INPUT 4		37
   INPUT 5		33

   Is the inspection result normal?

   YES 

   GO TO STEP 3  .

   NO 

   Repair or replace harness or connectors.

3. CHECK BCM OUTPUT VOLTAGE
   
   
   1. Connect BCM connector M18 and combination switch connector.
   2. Turn ignition switch ON.
   3. Check voltage between BCM connector M18 and ground.

      Combination switch signal	BCM		Ground	Voltage
      	Connector	Terminal
      INPUT 1	M18	38	-	Refer to REFERENCE VALUE .
      INPUT 2		39
      INPUT 3		36
      INPUT 4		37
      INPUT 5		33

   Is the inspection result normal?

   YES 

   Replace the combination switch. Refer to REMOVAL AND INSTALLATION .

   NO 

   Replace BCM. Refer to REMOVAL AND INSTALLATION .