Audio Mute Not Released

1. Turn ignition switch OFF.
2. Disconnect voice activated control module connector and audio unit connector.
3. Check continuity between audio unit harness connector M87 terminal 9 and ground.

   9 - Ground : Continuity should not exist. 

OK or NG

1. OK : GO TO 2.
2. NG : Repair harness or connector.
   Fig 1: Identifying Continuity Between Audio Unit Harness Connector M87 Terminal 9 And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.

1. Connect voice activated control module connector and audio unit connector.
2. Turn ignition switch ON.
3. Check the following.
   CONNECTOR TERMINALS VOLTAGE SPECIFICATIONS
   
   

   Unit	Terminals			PTT switch condition	Voltage (V)
   	(+)		(-)
   	Connector	Terminal
   Voice activated control module	B69	27	Ground	ON	Approx. 0
   				OFF	Approx. 5
   Audio unit	M87	9		ON	Approx. 0
   				OFF	Approx. 5

OK or NG

1. OK : Replace audio unit.
2. NG : Replace voice activated control module.
   Fig 2: Identifying Mute Signal

   Courtesy of NISSAN MOTOR CO., U.S.A.