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Sound Is Not Heard From Subwoofers (Base System)

WARNING: This page is about a different car, the 2008 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.

    FUSE REFERENCE

    Unit Terminals Signal name Fuse No.
    Subwoofer amp. 9 Ignition switch ACC or ON 4

    OK or NG 

    OK: GO TO 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 amp. connector.
    2. Check voltage between the subwoofer amp. and ground.
      SUBWOOFER AMP. AND GROUND

      Unit Terminal No. OFF ACC ON
      (+) (-)
      Connector Terminal
      Sub-woofer amp. B133 9 Ground 0V Battery voltage Battery voltage
      Fig 1: Checking Voltage Between Subwoofer Amp. And Ground
      G04918353Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO 3.

    NG:

    • Check connector housings for disconnected or loose terminals.
    • Repair harness or connector.
  3. GROUND CIRCUIT CHECK 
    1. Turn ignition switch OFF.
    2. Check continuity between subwoofer amp. harness connector B133 terminal 7 and ground.

      Continuity should exist. 

    Fig 2: Checking Continuity Between Subwoofer Amp. Harness Connector B133 Terminal 7 And Ground
    G04918354Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO 4.

    NG:

    • Check connector housings for disconnected or loose terminals.
    • Repair harness or connector.
  4. SUBWOOFER AMP. INPUT SIGNAL CHECK 
    1. Connect subwoofer amp. connector.
    2. Turn ignition switch to ACC.
    3. Check the signal between subwoofer amp. harness connector terminals with CONSULT-III or oscilloscope.
      SUBWOOFER AMP. INPUT SIGNAL CHECK

      Terminals Condition Reference signal
      (+) (-)
      Connector Terminal Connector Terminal
      B133 1 B133 2 Receive audio signal
      G04904044Courtesy of NISSAN MOTOR CO., U.S.A.
      B133 3 B133 4 Receive audio signal
      G04904044Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 3: Checking Signal Between Subwoofer Amp. Harness Connector Terminals
      G04918357Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO 5.

    NG:

    • Check connector housings for disconnected or loose terminals.
    • Repair harness or connector.
  5. SUBWOOFER AMP. OUTPUT SIGNAL CHECK 

    Check the signal between subwoofer amp. harness connector terminals with CONSULT-III or oscilloscope.

    SUBWOOFER AMP. OUTPUT SIGNAL CHECK

    Terminals Condition Reference signal
    (+) (-)
    Connector Terminal Connector Terminal
    B133 5 B133 6 Receive audio signal
    G04904044Courtesy of NISSAN MOTOR CO., U.S.A.
    B133 8 B133 10 Receive audio signal
    G04904044Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 4: Checking Signal Between Subwoofer Amp. Harness Connector Terminals
    G04918360Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO 6.

    NG: Replace subwoofer amp. Refer to "SUBWOOFER AMP. (BASE SYSTEM) ".

  6. HARNESS CHECK 
    1. Turn ignition switch OFF.
    2. Disconnect subwoofer amp. connector and subwoofer connectors.
    3. Check continuity between subwoofer amp. harness connector terminal and subwoofer harness connector terminal.
      SUBWOOFER AMP. HARNESS CONNECTOR TERMINAL AND SUBWOOFER HARNESS CONNECTOR TERMINAL

      Terminals Continuity
      Subwoofer amp. Subwoofer
      Connector Terminal Connector Terminal
      B133 5 B26 - Yes
      6 +
      8 B126 -
      10 +
    4. Check continuity between subwoofer amp. harness connector terminal and ground.
      SUBWOOFER AMP. HARNESS CONNECTOR TERMINAL AND GROUND

      Terminals Continuity
      Subwoofer amp. -
      Connector Terminal
      B133 5 Ground No
      6
      8
      10
    Fig 5: Checking Continuity Between Subwoofer Amp. Connector Terminal And Subwoofer Connector Terminal
    G04918361Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: Replace subwoofer. Refer to "SUBWOOFER (BASE SYSTEM) ".

    NG:

    • Check connector housings for disconnected or loose terminals.
    • Repair harness or connector.
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