Sound Is Not Heard From Rear Speaker or Rear Tweeter (BOSE System)

WARNING: This page is about a different car, the 2005 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

HARNESS CHECK
1. Disconnect BOSE speaker amp. connector M112 and rear speaker and tweeter connector (LH or RH).
2. Check continuity between BOSE speaker amp. harness connector M112 terminal and suspect speaker harness connector terminal.
  
  Fig 1: Connector M112 Terminal (Wire Color) Specifications
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check continuity between BOSE speaker amp. harness connector M112 terminal and ground.
  
  Fig 2: Checking Continuity Between Bose Speaker AMP Harness Connector M112 Terminals & Suspect Speaker Harness Connector Terminals
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Connector Terminal Continuity Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 2.
2. NG:
  - Check connector housings for disconnected or loose terminals.
  - Repair harness or connector.
REAR SPEAKER SIGNAL CHECK
1. Connect BOSE speaker amp. connector M112 and suspect speaker connector.
2. Turn ignition switch to ACC.
3. Push "POWER" switch.
4. Check the signal between BOSE speaker amp. harness connector M112 terminals with CONSULT-II or oscilloscope.
  
  Fig 4: Checking Rear Speaker Signal
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 5: Terminal Signal Reference Graph
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Replace suspect speaker. Refer to "REMOVAL AND INSTALLATION OF REAR SPEAKER " or "REMOVAL AND INSTALLATION OF REAR TWEETER ".
2. NG: GO TO 3.
HARNESS CHECK
1. Disconnect audio unit connector M44 and BOSE speaker amp. connector M112.
2. Check continuity between audio unit harness connector M44 terminal and BOSE speaker amp. harness connector M112 terminal.
  
  Fig 6: Connector M44 Terminal (Wire Color) Specification
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check continuity between audio unit harness connector terminal and ground.
  
  Fig 7: Checking Continuity Between Audio Unit Harness Connector M44 Terminal & Bose Speaker AMP Harness Connector M112 Terminals & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 8: Connector M44 Terminal Continuity Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 4.
2. NG:
  - Check connector housings for disconnected or loose terminals.
  - Repair harness or connector.
REAR SPEAKER SIGNAL CHECK
1. Connect audio unit connector M44 and BOSE speaker amp. connector M112.
2. Turn ignition switch to ACC.
3. Push "POWER" switch.
4. Check the signal between audio unit harness connector M44 terminals with CONSULT-II or oscilloscope.
  
  Fig 9: Checking Rear Speaker Signal
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 10: Terminal Signal Reference Graph
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Replace BOSE speaker amp. Refer to "REMOVAL AND INSTALLATION OF BOSE SPEAKER AMP. ".
2. NG: Replace audio unit. Refer to "REMOVAL AND INSTALLATION FOR AUDIO UNIT "