Base Audio

POWER SUPPLY AND GROUND CIRCUIT

DISPLAY UNIT : Diagnosis Procedure

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

1. CHECK INVERTER VCC AND SIGNAL VCC (POWER SUPPLY) CIRCUIT 1

Revision: March 20122013 Infiniti JX
Check voltage between display unit harness connector M93 terminals 2, 3 and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- GO TO 2.

2. CHECK INVERTER VCC AND SIGNAL VCC (POWER SUPPLY) CIRCUIT CONTINUITY

1.Turn ignition switch OFF.
2.Disconnect AV control unit connector M45 and display unit connector.
3.Check continuity between AV control unit connector M45 terminals 64, 76 and display unit connector M93
terminals 3, 2.





4.Check continuity between AV control unit connector M45 terminals 64, 76 and ground.





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

3. CHECK INVERTER VCC AND SIGNAL VCC (POWER SUPPLY) CIRCUIT 2

1.Connect the AV control unit connector M45.
2.Check voltage between AV control unit connector M45 terminals 64, 76 and ground.





Is the inspection result normal?
YES- Inspection End.
NO- Replace AV control unit. Refer to "Removal and Installation AV Control Unit" Base Audio.

4. CHECK INVERTER GROUND AND SIGNAL GROUND CIRCUIT CONTINUITY

1.Turn ignition switch OFF.
2.Disconnect AV control unit connector M45 and display unit connector.
3.Check continuity between AV control unit connector M45 terminals 63, 75 and display unit connector M93
terminals 14, 13.
Revision: March 20122013 Infiniti JX





Is the inspection result normal?
YES- GO TO 5.
NO- Repair or replace harness or connectors.

5. CHECK DISPLAY UNIT GROUND CIRCUIT

Check continuity between display unit connector M93 terminal 1 and ground.





Is the inspection result normal?
YES- Inspection End.
NO- Repair or replace harness or connectors.