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Home >> Toyota >> 2012 >> Highlander 2WD V6-3.5L (2GR-FE) >> Repair and Diagnosis >> Accessories and Optional Equipment >> Navigation System >> Testing and Inspection >> Component Tests and General Diagnostics >> Sound Signal Circuit Between Stereo Component Tuner Assembly and Multi-media Interface ECU
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Sound Signal Circuit Between Stereo Component Tuner Assembly and Multi-media Interface ECU





NAVIGATION: NAVIGATION SYSTEM: Sound Signal Circuit between Stereo Component Tuner Assembly and Multi-media Interface ECU
- Sound Signal Circuit between Stereo Component Tuner Assembly and Multi-media Interface ECU

DESCRIPTION

The stereo component tuner assembly sends satellite radio sound or RSE sound*1 signals to the navigation receiver assembly via this circuit and the multi-media interface ECU.

The sound signal that has been sent is amplified by the stereo component amplifier assembly, and then is sent to the speakers.

If there is an open or short in the circuit, sound cannot be heard from the speakers even if there is no malfunction in the television display assembly*1, multi-media interface ECU, stereo component amplifier assembly, navigation receiver assembly or speakers.

* *1: w/ Rear Seat Entertainment System

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

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

(a) Disconnect the E31 multi-media interface ECU connector.

(b) Disconnect the E29 stereo component tuner assembly connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table
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