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: Noise compensated volume only available on vehicles equipped with Y91.

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

• If the voltage is in between 7-9 volts, replace the noise compensation microphone.
• If the voltage is greater than 9 volts or less than 7 volts 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. Verification Tests