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Sound Is Not Heard From Subwoofers (BOSE System)

WARNING: This page is about a different car, the 2004 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUSE 
    • Check that the following fuse is not blown.
    HEARD FROM SUBWOOFERS (BOSE SYSTEM)

    Unit Terminals Signal name Fuse No.
    Subwoofer RH 6 Battery power 18

    OK or NG

    1. OK: GO TO 2.
    2. NG: If fuse is blown, be sure to eliminate cause of problem before installing new fuse. Refer to POWER SUPPLY ROUTING CIRCUIT .
  2. POWER SUPPLY CIRCUIT CHECK 
    1. Disconnect subwoofer RH connector.
    2. Check voltage between the subwoofer RH and ground.
    POWER SUPPLY CIRCUIT CHECK

    Unit Terminal No. OFF ACC ON
    (+) (-)
    Connector Terminal (wire color)
    Subwoofer RH B126 6 (Y) Ground Battery voltage Battery voltage Battery voltage
    Fig 1: Checking Continuity Between Subwoofer Amp. Harness Connector Terminal And Ground
    G03496211Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK: GO TO 3.
    2. NG:
      • Check connector housings for disconnected or loose terminals.
      • Repair harness or connector.
  3. GROUND CIRCUIT CHECK 

    Check continuity between subwoofer RH harness connector B126 terminal 5 (B) and ground.

    Continuity should exist. 

    Fig 2: Checking Ground Circuit
    G03496212Courtesy 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.
  4. CHECK SUBWOOFER AMP. ON SIGNAL 
    1. Operate system and check voltage between subwoofer RH harness connector B126 terminal 4 (G/W) and ground.
    1. Voltage: Approx. 6.5V 

    OK or NG

    1. OK: GO TO 4.
    2. NG:
      • Check connector housings for disconnected or loose terminals.
      • Repair harness or connector.
    Fig 3: Checking Subwoofer Amp. On Signal
    G03496213Courtesy of NISSAN MOTOR CO., U.S.A.
  5. HARNESS CHECK 
    1. Disconnect BOSE speaker amp. connector and subwoofer connectors.
    2. Check continuity between BOSE speaker amp. harness connector terminal and subwoofer harness connector harness connector terminal.
      Fig 4: Checking Harness
      G03496214Courtesy of NISSAN MOTOR CO., U.S.A.
      TERMINAL CONTINUITY SPECIFICATION

      Terminals Continuity
      BOSE speaker amp. Subwoofer
      Connector Terminal (Wire color) Connector Terminal (Wire color)
      B127 2 (B) B26 - (B) Yes
      B126 1 (B)
      18 (W) B26 + (W)
      B126 2 (W)
    3. Check continuity between BOSE speaker amp. harness connector terminal and ground.
    TERMINAL CONTINUITY SPECIFICATION

    Terminals Continuity
    BOSE speaker amp. -
    Connector Terminal (Wire color)
    B127 2 (B) Ground No
    18 (W)

    OK or NG

    1. OK: GO TO 5.
    2. NG:
      • Check connector housings for disconnected or loose terminals.
      • Repair harness or connector.
  6. WOOFER SIGNAL CHECK 
    1. Connect BOSE speaker amp. connector and woofer connector.
    2. Turn ignition switch to ACC.
    3. Check the signal BOSE speaker amp. harness connector terminal with CONSULT-II or oscilloscope.
    Fig 5: Terminal Continuity Specification
    G03496215Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 6: Checking Woofer Signal
    G03496216Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK: Replace woofer.
    2. NG: Replace BOSE speaker amp.
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