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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 2044 (Audio, Visual, Navigation & Telephone System) >> Audio >> Sound Is Not Heard From Rear Door Speaker or Rear Door Tweeter (BOSE System)

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

WARNING: This page is about a different car, the 2007 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
  1. HARNESS CHECK 
    1. Disconnect BOSE speaker amp. connector B75 and suspect speaker connector.
    2. Check continuity between BOSE speaker amp. harness connector terminal B75 and suspect speaker harness connector terminal. 3. Check continuity between BOSE speaker amp. harness connector B75 terminal and ground.
      TERMINAL CONTINUITY CHART

      Terminals Continuity
      BOSE speaker amp. Speaker or tweeter
      Connector Terminal Connector Terminal
      B75 9 D207 + Yes
      10 -
      11 D307 +
      12 -
      9 D208 +
      10 -
      11 D308 +
      12 -
    3. Check continuity between BOSE speaker amp. harness connector B75 terminal and ground.
      TERMINAL CONTINUITY CHART

      Terminals Continuity
      BOSE speaker amp. -
      Connector Terminal
      B75 9 Ground No
      10
      11
      12
      Fig 1: Checking Continuity Between Bose Speaker Amp Terminal B75 And Suspect Speaker Connector Terminal
      G04904127

    OK or NG 

    OK: GO TO 2.

    NG:

    • Check connector housings for disconnected or loose terminals.
    • Repair harness or connector.
  2. REAR SPEAKER SIGNAL CHECK 
    1. Connect BOSE speaker amp. connector B75 and suspect speaker connector.
    2. Turn ignition switch to ACC.
    3. Push "POWER" switch.
    4. Check the signal between BOSE speaker amp. harness connector B75 terminals with CONSULT-II or oscilloscope.
      TERMINAL SIGNAL CHART

      Terminals Condition Reference signal
      (+) (-)
      Connector Terminal Connector Terminal
      B75 9 B75 10 Receive audio signal
      G04904044
      11 12

    OK or NG 

    OK: Replace suspect speaker. Refer to "REAR DOOR SPEAKER ".

    NG: GO TO 3.

    Fig 2: Checking Voltage Between Bose Speaker Amp Harness Connector Terminals
    G04904129
  3. HARNESS CHECK 
    1. Disconnect audio unit connector M44 and BOSE speaker amp. connector B75.
    2. Check continuity between audio unit harness connector M44 terminals and BOSE speaker amp. harness connector B75 terminals.
      TERMINAL CONTINUITY CHART

      Terminals Continuity
      Audio unit BOSE speaker amp.
      Connector Terminal Connector Terminal
      M44 13 B75 25 Yes
      14 26
      15 23
      16 24
    3. Check continuity between audio unit harness connector terminal and ground.
      TERMINAL CONTINUITY CHART

      Terminals Continuity
      Audio unit -
      Connector Terminal
      M44 13 Ground No
      14
      15
      16
      Fig 3: Checking Continuity Between Audio Unit And BOSE Speaker Amp Connector Terminals
      G04904130

    OK or NG 

    OK: GO TO 4.

    NG:

    • Check connector housings for disconnected or loose terminals.
    • Repair harness or connector.
  4. REAR SPEAKER SIGNAL CHECK 
    1. Connect audio unit connector M44 and BOSE speaker amp. connector B75.
    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.
      TERMINAL SIGNAL CHART

      Terminals Condition Reference signal
      (+) (-)
      Connector Terminal Connector Terminal
      M44 14 M44 13 Receive audio signal
      G04904044
      16 15

    OK or NG 

    OK: Replace BOSE speaker amp. Refer to "BOSE SPEAKER AMP. ".

    NG: Replace audio unit. Refer to "REMOVAL AND INSTALLATION ".

    Fig 4: Checking Voltage Between Audio Unit Harness Connector Terminals
    G04904132
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