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Home >> Nissan-Datsun >> 2008 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 171 (Audio, Visual, Navigation System (BOSE Audio With Navigation)) >> DTC/Circuit Diagnosis >> Front Tweeter >> Diagnosis Procedure
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Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM - WITH NAVIGATION SYSTEM ".

  1. CONNECTOR CHECK

    Check the AV control unit, BOSE speaker amp. and speaker connectors for the following:

    • Proper connection
    • Damage
    • Disconnected or loose terminals

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: Repair the terminal and connector.

  2. HARNESS CHECK
    1. Disconnect BOSE speaker amp. connector B75 and suspect tweeter connector.
    2. Check continuity between BOSE speaker amp. harness connector B75 (A) and suspect tweeter harness connector (B).
      A B Continuity
      Connector Terminal Connector Terminal
      B75 13 M109 1 Yes
      14 2
      15 M111 1
      16 2
    3. Check continuity between BOSE speaker amp. harness connector B75 (A) and ground.
      A - Continuity
      Connector Terminal
      B75 13 Ground No
      14
      15
      16
    Fig 1: Checking Continuity Between Bose Speaker Amp. Connector B75 (A) Terminals And Suspect Tweeter Connector (B) Terminals
    G08169883Courtesy of NISSAN NORTH AMERICA, INC.

    Are continuity test results as specified? 

    YES: GO TO 3

    NO: Repair harness or connector.

  3. FRONT TWEETER SIGNAL CHECK
    1. Connect BOSE speaker amp. connector B75 and suspect tweeter 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 or oscilloscope.
      Connector Terminal Condition Reference signal
      (+) (-)
      B75 13 14 Receive audio signal
      G08169884
      15 16
    Fig 2: Checking Signal Between Bose Speaker Amp. Connector B75 Terminals Using Oscilloscope
    G08169885Courtesy of NISSAN NORTH AMERICA, INC.

    Is audio signal voltage as specified? 

    YES: Replace suspect tweeter. Refer to "REMOVAL AND INSTALLATION ".

    NO: GO TO 4

  4. HARNESS CHECK
    1. Disconnect AV control unit connector M39 and BOSE speaker amp. connector B75.
    2. Check continuity between AV control unit harness connector M39 (A) and BOSE speaker amp. harness connector B75 (B).
      A B Continuity
      Connector Terminal Connector Terminal
      M39 2 B75 30 Yes
      3 29
      11 28
      12 27
    3. Check continuity between AV control unit harness connector M39 (A) and ground.
      A - Continuity
      Connector Terminal
      M39 2 Ground No
      3
      11
      12
    Fig 3: Checking Continuity Between AV Control Unit Connector M39 (A) Terminals And Bose Speaker Amp. Connector B75 (B) Terminals
    G08169886Courtesy of NISSAN NORTH AMERICA, INC.

    Are continuity test results as specified? 

    YES: GO TO 5

    NO: Repair harness or connector.

  5. FRONT TWEETER SIGNAL CHECK
    1. Connect AV control unit connector and BOSE speaker amp. connector.
    2. Turn ignition switch ACC.
    3. Push "POWER" switch.
    4. Check the signal between AV control unit harness connector M39 terminals with CONSULT or oscilloscope.
      Connector Terminals Condition Reference signal
      (+) (-)
      M39 2 3 Receive audio signal
      G08169887
      11 12
    Fig 4: Checking Signal Between AV Control Unit Connector M39 Terminals Using Oscilloscope
    G08169888Courtesy of NISSAN NORTH AMERICA, INC.

    Are the audio signal voltage readings as specified? 

    YES: Replace BOSE speaker amp. Refer to "REMOVAL AND INSTALLATION ".

    NO: Replace AV control unit. Refer to "REMOVAL AND INSTALLATION ".

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