NAVIGATION SYSTEM Sound Signal Circuit between Radio Receiver and Extension Module

DESCRIPTION

The extension module sends the sound signal to the radio and display receiver assembly via this circuit.

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*1, radio and display receiver assembly, extension module or speakers.


WIRING DIAGRAM

A01UYYIE05
*a Extension Module
*b Radio and Display Receiver Assembly

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - EXTENSION MODULE)


    1. Disconnect the V2 radio and display receiver assembly connector.

    2. Disconnect the V1 extension module connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      V2-2 (CDR+) - V1-13 (CDR+) Always Below 1 Ω
      V2-3 (CDR-) - V1-12 (CDR-) Always Below 1 Ω
      V2-4 (CDL+) - V1-15 (CDL+) Always Below 1 Ω
      V2-5 (CDL-) - V1-14 (CDL-) Always Below 1 Ω
      V2-2 (CDR+) - Body ground Always 10 kΩ or higher
      V2-3 (CDR-) - Body ground Always 10 kΩ or higher
      V2-4 (CDL+) - Body ground Always 10 kΩ or higher
      V2-5 (CDL-) - Body ground Always 10 kΩ or higher

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR