Mute Signal Circuit between Stereo Component Amplifier and Telematics Transceiver

The DCM (telematics transceiver) sends a mute signal to the stereo component amplifier assembly.

The stereo component amplifier assembly controls the volume according to the mute signal from the DCM (telematics transceiver).

1. INSPECT DCM (TELEMATICS TRANSCEIVER)

(a) Measure the voltage according to the value(s) in the table below. Standard Voltage: Tester Connection Condition Specified Condition F39-17 (MUTE) - Body ground Ignition switch ACC, audio system is playing → Emergency call mode Above 3.5 V → Below 1 V Text in Illustration *a Component with harness connected (DCM (Telematics Transceiver))

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

1. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER))

(a) Disconnect the N11 stereo component amplifier assembly connector.

(b) Disconnect the F39 DCM (telematics transceiver) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY

(a) Reconnect the N11 stereo component amplifier assembly connector.

(b) Disconnect the F39 DCM (telematics transceiver) connector.

(c) Measure the voltage according to the value(s) in the table below. Standard Voltage: Tester Connection Condition Specified Condition F39-17 (MUTE) - Body ground Ignition switch ACC Above 3.5 V Text in Illustration *a Front view of wire harness connector (to DCM (Telematics Transceiver))

OK

REPLACE DCM (TELEMATICS TRANSCEIVER)

NG

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY