Audio Mute Not Released

WARNING: This page is about a different car, the 2003 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

AUDIO UNIT MUTE SIGNAL CIRCUIT
1. Disconnect voice activated control module connector and audio unit connector.
2. Check continuity between audio unit harness connector M87 terminal 9 (OR) and ground.
  1. Continuity should not exist.
OK or NG

OK >> GO TO 2.

NG >> Repair and replace harness.
CHECK MUTE SIGNAL
1. Connect voice activated control module connector and audio unit connector.
2. Turn ignition switch ON.
3. Check the following.
  
  Fig 2: Checking Mute Signal
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Identifying Terminal Voltage Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK >> Replace audio unit.

NG >> Replace voice activated control module.