Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Nissan 370Z. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CONTINUITY BETWEEN TEL ADAPTER UNIT AND MICROPHONE CIRCUIT

Turn ignition switch OFF.
Disconnect TEL adapter unit connector and microphone connector.

Check continuity between TEL adapter unit harness connector and microphone harness connector.

CONTINUITY SPECIFICATION

TEL adapter unit		Microphone		Continuity
Connector	Terminal	Connector	Terminal	Continuity
B237	7	R5	1	Existed
	8		2
	29		4

Check continuity between TEL adapter unit harness connector and ground.

CONTINUITY SPECIFICATION

TEL adapter unit		Ground	Continuity
Connector	Terminal
B237	7		Not existed
	29

Is inspection result OK?

YES: Go to 2.

NO: Repair harness or connector.

CHECK MICROPHONE POWER SUPPLY

Connect TEL adapter unit connector.
Turn ignition switch ON.
Check voltage between TEL adapter unit harness connector and ground.

VOLTAGE SPECIFICATION

TEL adapter unit		Ground	Voltage (Approx.)
Connector	Terminal
B237	29		5.0 V

Is inspection result OK?

YES: Go to 3.

NO: Replace TEL adapter unit. Refer to "REMOVAL AND INSTALLATION ".

CHECK MICROPHONE SIGNAL

Turn ignition switch OFF.
Connect microphone connector.
Turn ignition switch ON.
Check signal between TEL adapter unit harness connector.

TEL ADAPTER UNIT CONDITION REFERENCE

TEL adapter unit		TEL adapter unit		Condition	Reference value
Connector	Terminal	Connector	Terminal	Condition	Reference value
B237	7	B237	8	Give a voice.	Courtesy of NISSAN MOTOR CO., U.S.A.

Is inspection result OK?

YES: INSPECTION END

NO: Replace microphone. Refer to "REMOVAL AND INSTALLATION ".