MICROPHONE: Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

CHECK POWER SUPPLY CIRCUIT (MICROPHONE SIDE)

Turn ignition switch ON.

Check voltage between microphone harness connector R109 terminal 4 and ground.

(+)		(-)	Value (Approx.)
Connector	Terminal	(-)	Value (Approx.)
R109	4	Ground	5V

Fig 1: Checking Voltage Between Microphone Harness Connector R109 Terminal 4 And Ground

Courtesy of NISSAN NORTH AMERICA, INC.

Is approximately 5V present?

YES: GO TO 4.

NO: GO TO 2.

CHECK POWER SUPPLY CIRCUIT (CONTINUITY)

Turn ignition switch OFF.
Disconnect microphone and Bluetooth control unit harness connectors.

Check continuity between microphone harness connector R109 (A) terminal 4 and Bluetooth control unit harness connector B142 (B) terminal 29.

A		B		Continuity
Connector	Terminal	Connector	Terminal	Continuity
R109	4	B142	29	Yes

Check continuity between microphone harness connector R109 (A) terminal 4 and ground.

Fig 2: Checking Continuity Between Microphone Harness Connector R109 Terminal 4 And Ground

Courtesy of NISSAN NORTH AMERICA, INC.

A		-	Continuity
Connector	Terminal	-	Continuity
R109	4	Ground	No

Are the continuity test results as specified?

YES: GO TO 3.

NO: Repair harness or connector.

CHECK POWER SUPPLY CIRCUIT (BLUETOOTH CONTROL UNIT SIDE)

Connect Bluetooth control unit harness connector.
Turn ignition switch to ACC.

Check voltage between Bluetooth control unit harness connector B142 terminal 29 and ground.

(+)		(-)	Value (Approx.)
Connector	Terminal	(-)	Value (Approx.)
B142	29	Ground	5V

Fig 3: Checking Voltage Between Bluetooth Control Unit Harness Connector B142 Terminal 29 And Ground

Courtesy of NISSAN NORTH AMERICA, INC.

Is approximately 5V present?

YES: Inspection End.

NO: Replace Bluetooth control unit. Refer to "REMOVAL AND INSTALLATION ".

CHECK GROUND CIRCUIT

Turn ignition switch OFF.
Disconnect microphone harness connector R109 and Bluetooth control unit harness connector B142.

Check continuity between microphone harness connector R109 (A) terminal 2 and Bluetooth control unit harness connector B142 (B) terminal 8.

A		B		Continuity
Connector	Terminal	Connector	Terminal	Continuity
R109	2	B142	8	Yes

Fig 4: Checking Continuity Between Microphone Harness Connector R109 Terminal 2 And Bluetooth Control Unit Harness Connector B142 Terminal 8

Courtesy of NISSAN NORTH AMERICA, INC.

Does continuity exist?

YES: Inspection End.

NO: Repair harness or connector.