Nissan Altima 2007-2012 Service Manual: AMP on signal circuit

Description

When the audio system is turned on, a voltage signal is supplied from the audio unit to the BOSE speaker amp. When this signal is received, the BOSE speaker amp. will turn on.

Diagnosis Procedure

1.CHECK AMP ON SIGNAL (BOSE SPEAKER AMP)

1. Turn audio system ON.

2. Check voltage between BOSE speaker amp. harness connector B121 terminal 60 and ground.

Is voltage greater than 6.5V? YES >> Inspection End.

NO >> GO TO 2

2.CHECK AMP ON SIGNAL (AUDIO UNIT)

Check voltage between audio unit harness connector M43 terminal 1 and ground.

Is voltage greater than 6.5V? YES >> Repair harness or connector.

NO >> Replace audio unit. Refer to AV-215, "Removal and Installation".

    Subwoofer (sedan)
    Description The audio unit sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the audio signals before sending them to the subwoofers using the audio signal circuits. D ...

    Steering switch (coupe)
    Description When one of the steering wheel audio control switches is pushed, the resistance in the steering switch circuit changes depending on which button is pushed. Diagnosis Procedure WITH ...

    Other materials:

    Steering switch (sedan)
    Description When one of the steering wheel audio control switches is pushed, the resistance in steering switch circuit changes depending on which button is pushed. Diagnosis Procedure WITH BLUETOOTH 1.CHECK HARNESS 1. Turn ignition switch OFF. 2. Disconnect Bluetooth control unit connect ...

    ECM branch line circuit
    Diagnosis Procedure INSPECTION PROCEDURE 1.CHECK CONNECTOR 1. Turn the ignition switch OFF. 2. Disconnect the battery cable from the negative terminal. 3. Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side). - ECM - Harnes ...

    M&A branch line circuit
    Diagnosis Procedure INSPECTION PROCEDURE 1.CHECK CONNECTOR 1. Turn the ignition switch OFF. 2. Disconnect the battery cable from the negative terminal. 3. Check the terminals and connectors of the combination meter for damage, bend and loose connection (unit side and connector side). ...