1.CHECK CONTINUITY RGB DIGITAL IMAGE SIGNAL CIRCUIT

1. Turn ignition switch OFF.
2. Disconnect display unit connector and AV control unit connector.
3. Check continuity between display unit harness connector and AV control unit harness connector.

   Display unit | AV control unit | Continuity
   Connector | Terminals | Connector | Terminals
   M397 | 27 | M396 | 157 | Existed
   28 | 158

4. Check continuity between display unit harness connector and ground.

   Display unit | Ground | Continuity
   Connector | Terminals
   M397 | 27 | Not existed
   28

Is the inspection result normal?
YES>>GO TO 2.
NO>>Repair harness or connector.
2.CHECK RGB DIGITAL IMAGE SIGNAL

1. Connect AV control unit connector.
2. Turn ignition switch ON.
3. Check signal between display unit harness connector and ground.

   (+) | (−) | Condition | Voltage (Approx.)
   Display unit
   Connector | Terminal
   M397 | 27 | Ground | — | 3.3 V
   28

Is the inspection result normal?
YES>>Replace display unit.
NO>>Replace AV control unit.