NAVIGATION SYSTEM (for Navigation Receiver Type) Sound Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter

DESCRIPTION

The No. 1 stereo jack adapter assembly sends the sound signal from an external device to the navigation ECU sub-assembly via 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 or speakers.

WIRING DIAGRAM

A0041EQE31

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY - NO. 1 STEREO JACK ADAPTER ASSEMBLY)


    1. A0041NXE38
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Navigation ECU Sub-assembly)
      *b

      Front view of wire harness connector

      (to No. 1 Stereo Jack Adapter Assembly)

      Disconnect the L27 navigation ECU sub-assembly connector.

    2. Disconnect the L111 No. 1 stereo jack adapter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L27-25 (ADPG) - L111-9 (AUXO) Always Below 1 Ω
      L27-26 (VAR+) - L111-6 (ARO) Always Below 1 Ω
      L27-28 (VAL+) - L111-7 (ALO) Always Below 1 Ω
      L27-27 (VA-) - L111-8 (ASGN) Always Below 1 Ω
      L27-11 (AGND) - L111-10 (AGND) Always Below 1 Ω
      L27-25 (ADPG) - Body ground Always 10 kΩ or higher
      L27-26 (VAR+) - Body ground Always 10 kΩ or higher
      L27-28 (VAL+) - Body ground Always 10 kΩ or higher
      L27-27 (VA-) - Body ground Always 10 kΩ or higher
      L27-11 (AGND) - 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