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AMP ON SIGNAL CIRCUIT

Description

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


Diagnosis Procedure

Regarding Wiring Diagram information, With Navigation.

1. CHECK AMP ON SIGNAL (BOSE SPEAKER AMP)

1.Turn audio system ON.





2.Check voltage between BOSE speaker amp. harness connector
B75 terminal 31 and ground.





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 M39 terminal 1 and ground.





Is battery voltage present?
YES- Repair harness or connector.
NO- Replace AV control unit. With Navigation.