Mute Signal Circuit between Stereo Component Tuner Assembly and Multi-media Interface ECU: Procedure

CHECK STEREO COMPONENT TUNER ASSEMBLY

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

Fig 1: Identifying Stereo Component Tuner Connector Terminal Identification

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Standard Voltage

Tester Connection	Switch Condition	Specified Condition
G24-6 (MUTE) - Body ground	Ignition switch ACC, Satellite radio playing → Changing source	Higher than 3.5 V → Below 1 V

TEXT IN ILLUSTRATION

*a	Component with harness connected (Stereo Component Tuner Assembly)

NG → See step 2

OK → See step 3

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT TUNER - MULTI-MEDIA INTERFACE ECU)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
G24-6 (MUTE) - G23-14 (MUT2)	Always	Below 1 Ω
G24-6 (MUTE) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 4

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
REPLACE MULTI-MEDIA INTERFACE ECU. Refer to REMOVAL