U1243

U1243 DISPLAY UNIT

DTC Logic








Diagnosis Procedure


1. CHECK FRONT DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT

Check front display unit power supply and ground circuit. Front Display Unit.
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 and AV control unit harness connector.





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





Is the inspection result normal?
YES- GO TO 3.
NO- Repair harness or connector.

3. CHECK 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 and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- Replace AV control unit. Removal And Installation.

4. CHECK COMMUNICATION SIGNAL

Check signal between front display unit harness connector and ground.





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