Sound Signal Circuit Between Multi-media Interface ECU and Stereo Jack Adapter (from 12/2010)

NAVIGATION: NAVIGATION SYSTEM: Sound Signal Circuit between Multi-media Interface ECU and Stereo Jack Adapter
- Sound Signal Circuit between Multi-media Interface ECU and Stereo Jack Adapter

DESCRIPTION

The No. 1 stereo jack adapter assembly sends an external device sound signal to the multi-media interface ECU through this circuit.

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 stereo component amplifier assembly, navigation receiver assembly or speakers.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA INTERFACE ECU - NO. 1 STEREO JACK ADAPTER)

(a) Disconnect the E46 multi-media interface ECU connector.





(b) Disconnect the M3 No. 1 stereo jack adapter 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 -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table (from 12/2010)