Base Audio

U1243 DISPLAY UNIT

DTC Logic








Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" Base Audio.

1. CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT

Check display unit power supply and ground circuits. Refer to "DISPLAY UNIT : Diagnosis Procedure" Base Audio.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace harness or connectors.

2. CHECK COMMUNICATION CIRCUIT CONTINUITY

1.Turn ignition switch OFF.
2.Disconnect display unit connector and AV control unit connector M45.
3.Check continuity between display unit connector M93 terminals 11, 22 and AV control unit connector M45
terminals 73, 61.





4.Check continuity between display unit connector M93 terminals 11, 22 and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace harness or connectors.
CONT)

3. CHECK COMMUNICATION SIGNAL (DISP -> CONT)

1.Connect display unit connector and AV control unit connector M45.
2.Turn ignition switch ON.
3.Check signal between display unit connector M93 terminal 11 and ground.
Revision: March 20122013 Infiniti JX





Is the inspection result normal?
YES- GO TO 4.
NO- Replace AV control unit. Refer to "Removal and Installation AV Control Unit" Base Audio.
DISP)

4. CHECK COMMUNICATION SIGNAL (CONT -> DISP)

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





Is the inspection result normal?
YES- Inspection End.
NO- Replace display unit. Refer to "Removal and Installation" Base Audio.
Revision: March 20122013 Infiniti JX