Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

1. CHECK RGB DIGITAL IMAGE SIGNAL CIRCUIT CONTINUITY
   
   
   1. Turn ignition switch OFF.
   2. Disconnect AV control unit connector M140 and display unit connector M141.
   3. Check continuity between AV control unit connector M140 and display unit connector M141.

      AV control unit		Display unit		Continuity
      Connector	Terminals	Connector	Terminals
      M140	165	M141	28	Yes
      	164		27

   4. Check continuity between AV control unit connector M140 and ground.

      AV control unit		Ground	Continuity
      Connector	Terminals
      M140	165	-	No

   Is the inspection result normal?

   YES 

   GO TO STEP 2  .

   NO 

   Repair or replace harness or connectors.

2. CHECK RGB DIGITAL IMAGE SIGNAL
   
   
   1. Connect AV control unit connector M140.
   2. Turn ignition switch ON.
   3. Check signal between terminals of display unit connector M141.

      Display unit connector M141		Condition	Voltage (Approx.)
      (+)	(-)
      Terminal	Terminal
      28	27	Audio system is ON.	1.3 V

   Is the inspection result normal?

   YES 

   Replace display unit. Refer to REMOVAL AND INSTALLATION .

   NO 

   Replace AV control unit. Refer to REMOVAL AND INSTALLATION .