Noise Compensated Volume Inoperative

Noise Compensated Volume Inoperative

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Circuit/System Testing

Important: With a scan tool perform the microphone test under amplifier special functions menu. If the microphone passes the microphone test the system is OK.

1. Turn the ignition ON, Disconnect the noise compensation microphone.
2. Measure for 7 V to 9 V between the noise compensation microphone supply circuit and the drain circuit.

• If the voltage is in between 9 to 7 V, replace the noise compensation microphone

• If the voltage is greater than 9 V or less than 7 V and a open, short to ground, or short to voltage can not be found, replace the radio.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

* Programming and RelearningProgramming and Relearning
* Radio Volume Compensator Interior Noise Microphone Replacement. Verification Tests