NAVIGATION SYSTEM(except Sedan) Sound Signal Circuit between Radio Receiver and Extension Module

DTC Code DTC Name
Sound Signal Circuit between Radio Receiver and Extension Module

DESCRIPTION

The navigation ECU 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, navigation ECU or speakers.

  • *1: for 9 Speakers

WIRING DIAGRAM

E226629E06

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NAVIGATION ECU)

    1. Disconnect the V3 radio and display receiver assembly connector.

    2. Disconnect the V1 navigation ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      V3-2 (CDR+) - V1-13 (CDR+)

      Always

      Below 1 Ω

      V3-3 (CDR-) - V1-12 (CDR-)

      Always

      Below 1 Ω

      V3-4 (CDL+) - V1-15 (CDL+)

      Always

      Below 1 Ω

      V3-5 (CDL-) - V1-14 (CDL-)

      Always

      Below 1 Ω

      V3-1 (CSHLD) - V1-28 (CSHLD)

      Always

      Below 1 Ω

      V3-2 (CDR+) - Body ground

      Always

      10 kΩ or higher

      V3-3 (CDR-) - Body ground

      Always

      10 kΩ or higher

      V3-4 (CDL+) - Body ground

      Always

      10 kΩ or higher

      V3-5 (CDL-) - Body ground

      Always

      10 kΩ or higher

      V3-1 (CSHLD) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR