U1247

U1247 REAR DISPLAY UNIT





DTC Logic









Diagnosis Procedure
1.CHECK REAR DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT
Check rear display unit power supply and ground circuits. Rear Display Unit.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair malfunctioning parts.
2.CHECK CONTINUITY SERIAL COMMUNICATION CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear display unit connector and video distributor connector.
3. Check continuity between rear display unit harness connector and video distributor harness connector.





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





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





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





Is the inspection result normal?
YES - INSPECTION END
NO - Replace video distributor.