Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

1. CHECK FUSE
   
   

   Check that the following fuses are not blown.

   Terminal No.	Signal name	Fuse No.
   15, 16	Battery power supply	15 (15A)

   Are the fuses blown?

   YES 

   Replace the blown fuse after repairing the affected circuit.

   NO 

   GO TO STEP 2  .

2. CHECK POWER SUPPLY CIRCUIT
   
   
   1. Disconnect headrest display unit connector.
   2. Check voltage between headrest display unit connector and ground.

      Headrest display unit		Ground	Voltage (Approx.)
      Connector	Terminal
      B202 (driver seat)	15, 16	-	Battery voltage
      B302 (passenger seat)

   Is the inspection result normal?

   YES 

   GO TO STEP 3  .

   NO 

   Repair or replace harness or connectors.

3. CHECK GROUND CIRCUIT
   
   
   1. Turn ignition switch OFF.
   2. Check continuity between headrest display unit connector and ground.

      Headrest display unit		Ground	Continuity
      Connector	Terminal
      B202 (driver seat)	12, 31, 32	-	Yes
      B302 (passenger seat)	28, 31, 32

   Is the inspection result normal?

   YES 

   Inspection End.

   NO 

   Repair or replace harness or connectors.