Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

1. CHECK FUSE
   
   

   Check that the following fuse is not blown.

   Terminal No.	Signal name	Fuse No.
   3	ACC power supply	65 (10A)

   Is the fuse blown?

   YES 

   Replace the blown fuse after repairing the affected circuit.

   NO 

   GO TO STEP 2  .

2. CHECK POWER SUPPLY CIRCUIT
   
   
   1. Turn ignition switch OFF.
   2. Disconnect multifunction switch connector.
   3. Check voltage between multifunction switch connector M98 terminal 3 and ground.

      Multifunction switch		Ground	Condition	Voltage (Approx.)
      Connector	Terminal
      M98	3	-	Ignition switch: ACC	Battery voltage

   Is the inspection result normal?

   YES 

   GO TO STEP 3  .

   NO 

   Repair or replace harness or connectors.

3. CHECK CONTROL UNIT GROUND CIRCUIT
   
   
   1. Turn ignition switch OFF.
   2. Disconnect AV control unit connector M164.
   3. Check continuity between multifunction switch connector M98 terminal 9 and AV control unit connector M164 terminal 98.

      Multifunction switch		AV control unit		Continuity
      Connector	Terminal	Connector	Terminal
      M98	9	M164	98	Yes

   Is the inspection result normal?

   YES 

   GO TO STEP 4  .

   NO 

   Repair or replace harness or connectors.

4. CHECK SWITCH GROUND CIRCUIT
   
   

   Check continuity between multifunction switch connector M98 terminal 1 and ground.

   Multifunction switch		Ground	Continuity
   Connector	Terminal
   M98	1	-	Yes

   Is the inspection result normal?

   YES 

   Inspection End.

   NO 

   Repair or replace harness or connectors.