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 signals to the multi-media interface ECU through this circuit.

The sound signal that has been sent is amplified by the stereo component amplifier, 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 stereo component amplifier, navigation receiver assembly or speakers.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
After replacing the stereo component tuner assembly of vehicles subscribed to pay-type satellite radio broadcasts, registration of the XM radio ID is necessary.

PROCEDURE

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

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





(b) Disconnect the stereo component tuner assembly connector.





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

Standard Resistance:





Text in Illustration

Text in Illustration:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. INSPECT STEREO COMPONENT TUNER ASSEMBLY

(a) Reconnect the stereo component tuner assembly connector.





(b) Check the waveform according to the conditions in the table below.

Standard:





Text in Illustration

Text in Illustration:

NG -- REPLACE STEREO COMPONENT TUNER ASSEMBLY

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