U1A0C

U1A0C MICROPHONE

DTC Logic








Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" Telematics System (Bose Audio w/o Surround Sound)
or "Wiring Diagram" Telematics System (Bose Audio with Surround Sound).

1. CHECK DCM MIC SIGNAL CIRCUIT AND DCM MIC VCC CIRCUIT CONTINUITY

1.Turn ignition switch OFF.
2.Disconnect TCU connector M47 and AV control unit connector M122.
3.Check continuity between TCU connector M47 and AV control unit connector M122.





4.Check the continuity between TCU connector M47 and ground.





Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace harness or connectors.

2. CHECK DCM MIC VCC VOLTAGE

1.Connect TCU connector M47 and AV control unit connector M122.
2.Turn ignition switch ON.
3.Check voltage between AV control unit connector M122 terminals.





Is the inspection result normal?
YES- GO TO 3.
NO- Replace TCU. Refer to "Removal and Installation" Service and Repair.

3. CHECK DCM MIC SIGNAL

Check signal between AV control unit connector M122.
Revision: March 20122013 Infiniti JX





Is the inspection result normal?
YES- Replace TCU. Refer to "Removal and Installation" Service and Repair.
NO- Replace AV control unit. Refer to "Removal and Installation AV Control Unit" Telematics System.
Revision: March 20122013 Infiniti JX