Diagnosis Procedure

1. Turn ignition switch OFF.
2. Disconnect TEL adapter unit connector and microphone connector.
3. Check continuity between TEL adapter unit harness connector and microphone harness connector.

   TEL adapter unit		Microphone		Continuity
   Connector	Terminals	Connector	Terminals
   B237	7	R7	1	Existed
   	8		2
   	29		4

4. Check continuity between TEL adapter unit harness connector and ground.

   TEL adapter unit		Ground	Continuity
   Connector	Terminals
   M237	7		Not existed
   	29

Is the inspection result normal?

YES 

GO TO STEP 2. 

NO 

Repair harness or connector.

1. Connect TEL adapter unit connector.
2. Turn ignition switch ON.
3. Check voltage between TEL adapter unit harness connector.

   (+)		(-)		Voltage (Approx.)
   TEL adapter unit		TEL adapter unit
   Connector	Terminal	Connector	Terminal
   B237	29	B237	8	5.0 V

Is the inspection result normal?

YES 

GO TO STEP 3. 

NO 

Replace TEL adapter unit. Refer to EXPLODED VIEW .

1. Connect microphone connector.
2. Check signal between TEL adapter unit harness connector.

   (+)		(-)		Condition	Reference value
   TEL adapter unit		TEL adapter unit
   Connector	Terminal	Connector	Terminal
   B237	7	B237	8	give a voice.	Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES 

Replace TEL adapter unit. Refer to EXPLODED VIEW .

NO 

Replace microphone. Refer to EXPLODED VIEW .