With Mobile Entertainment System

U1243 DISPLAY UNIT





Description









DTC Logic









Diagnosis Procedure
1.CHECK FRONT DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT
Check front display unit power supply and ground circuits. With Mobile Entertainment System.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair malfunctioning parts.
2.CHECK CONTINUITY COMMUNICATION CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front display unit connector and AV control unit connector.
3. Check continuity between front display unit harness connector terminals 11, 22 and AV control unit harness connector terminals 102, 103.

11 - 102: Continuity should exist.
22 - 103: Continuity should exist.

4. Check continuity between front display unit harness connector terminals 11, 22 and ground.

11, 22 - Ground: Continuity should not exist.

Is the inspection result normal?
YES - GO TO 3.
NO - Repair harness or connector.
3.CHECK SERIAL COMMUNICATION SIGNAL
1. Connect front display unit connector and AV control unit connector.
2. Turn ignition switch ON.
3. Check signal between front display unit harness connector terminal 11 and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - Replace AV control unit.
4.CHECK SERIAL COMMUNICATION SIGNAL
Check signal between front display unit harness connector terminal 22 and ground.





Is the inspection result normal?
YES - INSPECTION END
NO - Replace front display unit.