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".

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