U1243

U1243 FRONT DISPLAY UNIT





DTC Logic









Diagnosis Procedure
1.CHECK FRONT DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUITS
Check front display unit power supply and ground circuits. Front Display Unit.
Is inspection result normal?
YES - GO TO 2.
NO - Repair malfunctioning parts.
2.CHECK CONTINUITY COMMUNICATION CIRCUITS
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 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 inspection result normal?
YES - GO TO 4.
NO - Replace AV control unit. Service and Repair.
4.CHECK COMMUNICATION SIGNAL
Check signal between front display unit harness connector and ground.






Is inspection result normal?
YES - INSPECTION END
NO - Replace front display unit. Service and Repair.