Sound Signal Circuit Between Navigation Receiver Assembly and Multi-media Interface ECU

NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: Sound Signal Circuit between Navigation Receiver Assembly and Multi-media Interface ECU
- Sound Signal Circuit between Navigation Receiver Assembly and Multi-media Interface ECU

DESCRIPTION

The multi-media interface ECU sends USB audio sound signals, satellite radio sound signals and RSE sound signals*1 to the navigation receiver assembly 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.

* *1: Rear Seat Entertainment System

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - MULTI-MEDIA INTERFACE ECU)

(a) Disconnect the E18 navigation receiver assembly connector.

(b) Disconnect the E33 multi-media interface ECU connector.

Text in Illustration

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

2. INSPECT MULTI-MEDIA INTERFACE ECU

(a) Reconnect the E33 multi-media interface ECU connector.

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

Standard:

Text in Illustration

NG -- REPLACE MULTI-MEDIA INTERFACE ECU Removal

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures