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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 918 (Audio, Visual, Navigation System (BOSE Audio) (With Navigation)) >> DTC/Circuit Diagnosis >> Amp On Signal Circuit >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

  1. CHECK AMP ON SIGNAL (BOSE SPEAKER AMP) 
    1. Turn audio system ON.
    2. Check voltage between BOSE speaker amp. harness connector M113 terminal 31 and ground.
      (+) (-) ACC
      Connector Terminal
      M113 31 Ground Battery voltage
      Fig 1: Checking AMP On Signal (Bose Speaker Amp) Voltage
      G08691272Courtesy of NISSAN NORTH AMERICA, INC.

      Is battery voltage present? 

      YES: Inspection End.

      NO: GO TO 2.

  2. CHECK AMP ON SIGNAL (AV CONTROL UNIT) 

    Check voltage between AV control unit harness connector M161 terminal 1 and ground.

    (+) (-) ACC
    Connector Terminal
    M161 1 Ground Battery voltage
    Fig 2: Checking AMP On Signal (AV Control Unit) Voltage
    G08691273Courtesy of NISSAN NORTH AMERICA, INC.

    Is battery voltage present? 

    YES: Repair harness or connector.

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