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 radio and display receiver assembly, extension module or speakers.

WIRING DIAGRAM

A003SHRE01

INSPECTION PROCEDURE

PROCEDURE


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


    1. Disconnect the radio and display receiver assembly connector.

    2. Disconnect the extension module connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      i3-2 (CDR+) - i1-13 (CDR+) Always Below 1 Ω
      i3-3 (CDR-) - i1-12 (CDR-) Always Below 1 Ω
      i3-4 (CDL+) - i1-15 (CDL+) Always Below 1 Ω
      i3-5 (CDL-) - i1-14 (CDL-) Always Below 1 Ω
      i3-2 (CDR+) - Body ground Always 10 kΩ or higher
      i3-3 (CDR-) - Body ground Always 10 kΩ or higher
      i3-4 (CDL+) - Body ground Always 10 kΩ or higher
      i3-5 (CDL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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