Telematics System (DTC/Circuit Diagnosis)

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

CHECK MIC IN SIGNAL CIRCUIT AND MIC VCC CIRCUIT CONTINUITY

Turn ignition switch OFF.
Disconnect TCU connector M47 and microphone connector R109.

Check continuity between TCU connector M47 and microphone connector R109.

TCU		Microphone		Continuity
Connector	Terminal	Connector	Terminal
M47	16	R109	2	Yes
	17		1
	18		4

Check the continuity between TCU connector M47 and ground.

TCU		Ground	Continuity
Connector	Terminal
M47	17	--	No
	18

Is the inspection result normal?

YES

GO TO 2.

Repair or replace harness or connectors.

CHECK MIC VCC VOLTAGE

Connect TCU connector M47 and microphone connector R109.
Turn ignition switch ON.

Check voltage between terminals of TCU connector M47.

TCU connector M47		Voltage (Approx.)
(+)	(-)
Terminal	Terminal
18	16	5.0 V

Is the inspection result normal?

YES

GO TO 3.

Replace TCU. Refer to Removal and Installation .

CHECK MIC IN SIGNAL

Check signal between terminals of TCU connector M47.

TCU connector M47		Condition	Reference value
(+)	(-)
Terminal	Terminal
17	16	Speak into microphone.	Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES

Replace TCU. Refer to Removal and Installation .

Replace microphone. Refer to Removal and Installation .