U1243

U1243 DISPLAY UNIT





Description









DTC Logic









Diagnosis Procedure
Regarding Wiring Diagram information, Electrical Diagrams.
1.CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT
Check display unit power supply and ground circuit. Display Unit.
Is inspection result OK?
YES - GO TO 2.
NO - Repair malfunctioning parts.
2.CHECK CONTINUITY COMMUNICATION CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect display unit connector M93 and AV control unit connector M43.





3. Check continuity between display unit harness connector M93
(A) terminals 11, 22 and AV control unit harness connector M43
(B) terminals 30, 31.





4. Check continuity between display unit harness connector M93
(A) terminals 11, 22 and ground.





Are continuity results as specified?
YES - GO TO 3.
NO - Repair harness or connector.
3.CHECK COMMUNICATION SIGNAL





1. Connect display unit connector M93 and AV control unit connector M43.
2. Turn ignition switch ON.
3. Check signal between display unit harness connector M93 terminal 11 and ground.





Are voltage readings as specified?
YES - GO TO 4.
NO - Replace AV control unit. AV Control Unit.
4.CHECK COMMUNICATION SIGNAL





Check signal between display unit harness connector M93 terminal
22 and ground.





Are voltage readings as specified?
YES - Inspection end.
NO - Replace display unit. Display Unit.