NAVIGATION SYSTEM Navigation Voice Circuit between Radio Receiver and Stereo Component Amplifier

DESCRIPTION

This circuit is used when the voice guidance of the navigation system is on or the voice switch of the steering pad switch assembly is pushed.

Using this circuit, the navigation ECU sends signals to the stereo component amplifier assembly via the radio and display receiver assembly.

WIRING DIAGRAM

A001TK7E49
*a (Shielded)
*b Radio and Display Receiver Assembly
*c Stereo Component Amplifier Assembly

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY)


    1. Disconnect the F127 radio and display receiver assembly connector.

    2. Disconnect the F76 stereo component amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F76-15 (II1+) - F127-2 (RL+) Always Below 1 Ω
      F76-14 (II1-) - F127-6 (RL-) Always Below 1 Ω
      F76-18 (SLD1) - Body ground Always 10 kΩ or higher
      F76-15 (II1+) - Body ground Always 10 kΩ or higher
      F76-14 (II1-) - 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