Mute Signal Circuit between Stereo Component Amplifier and Telematics Transceiver: Procedure

INSPECT DCM (TELEMATICS TRANSCEIVER)

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

Fig 1: Measure The Voltage

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Standard Voltage

Tester Connection	Condition	Specified Condition
G25-17 (MUTE) - Body ground	Engine switch on (ACC), audio system is playing → Emergency call mode	Above 3.5 V → Below 1 V

TEXT IN ILLUSTRATION

*1	Component with harness connected (DCM (Telematics Transceiver))

NG → See step 2

OK → See step 4

CHECK HARNESS AND CONNECTOR

Disconnect the stereo component amplifier assembly connector and DCM (telematics transceiver) connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
O33-24 (TMUT) - G25-17 (MUTE)	Always	Below 1 Ω
O33-24 (TMUT) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY

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

Fig 2: Measure The Voltage

Standard Voltage

Tester Connection	Condition	Specified Condition
O33-24 (TMUT) - Body ground	Engine switch on (ACC)	Above 3.5 V

TEXT IN ILLUSTRATION

*1	Component without harness connected (Stereo Component Amplifier Assembly)

NG → See step 6

OK → See step 5

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to REMOVAL
REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to REMOVAL