Sound Signal Circuit Between Navigation Receiver Assembly and Stereo Component Tuner Assembly

NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: Sound Signal Circuit between Navigation Receiver Assembly and Stereo Component Tuner Assembly

Sound Signal Circuit between Navigation Receiver Assembly and Stereo Component Tuner Assembly

DESCRIPTION

The stereo component tuner assembly sends satellite radio sound signals and RSE sound signals*1 to the navigation receiver assembly via the sound signal 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.
*1:w/ Rear Seat Entertainment System only

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 (NAVIGATION RECEIVER - STEREO COMPONENT TUNER)




(a) Disconnect the E18 navigation receiver assembly connector.




(b) Disconnect the M20 stereo component tuner assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





Text in Illustration





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

2. INSPECT STEREO COMPONENT TUNER ASSEMBLY




(a) Reconnect the M20 stereo component tuner assembly connector.
(b) Check the waveform according to the conditions in the table below.
Standard:





Text in Illustration





NG -- REPLACE STEREO COMPONENT TUNER ASSEMBLY
OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE