NAVIGATION SYSTEM Mute Signal Circuit between Navigation Receiver Assembly and Television Display Assembly

DESCRIPTION

The navigation ECU sub-assembly controls the volume according to the mute signal from the television display assembly.

The mute signal is sent to reduce noise and popping sounds such as those generated when switching modes. If there is an open in the circuit, noise can be heard from the speakers when changing the sound source. If there is a short in the circuit, even though the navigation ECU sub-assembly is functioning normally, no sound or only an extremely faint sound can be heard.

WIRING DIAGRAM

A01CD83E03

INSPECTION PROCEDURE

Note

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System Click here.

PROCEDURE


  1. INSPECT TELEVISION DISPLAY ASSEMBLY


    1. A01CD1ZE74
      Text in Illustration
      *a

      Component with harness connected

      (Television Display Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      S6-6 (MUTE) - Body ground Engine switch on (ACC), RSE system playing → Changing source Above 3.5 V → Below 1 V

    NG

    CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY - TELEVISION DISPLAY ASSEMBLY) Click here

    OK

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

  2. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY - TELEVISION DISPLAY ASSEMBLY)


    1. Disconnect the F35 navigation ECU sub-assembly connector.

    2. Disconnect the S6 television display assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F35-6 (MUTE) - S6-6 (MUTE) Always Below 1 Ω
      F35-6 (MUTE) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE TELEVISION DISPLAY ASSEMBLY


    1. Replace the television display assembly and check if it operates normally Click here.

      OK
      The navigation system operates normally.

    NG

    REPLACE NAVIGATION ECU SUB-ASSEMBLY Click here

    OK

    END