NAVIGATION SYSTEM (for Navigation Receiver Type) Mute Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier

DESCRIPTION

This circuit sends a signal to the stereo component amplifier assembly to mute noise. Due to this, the noise produced by changing the sound source ceases.

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 stereo component amplifier assembly is functioning normally, no sound or only an extremely faint sound can be heard.

WIRING DIAGRAM

B000JSKE83

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY


    1. B000NB2E59
      Text in Illustration
      *a

      Component with harness connected

      (Stereo Component Amplifier Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      I69-1 (MUTE) - Body ground

      Ignition switch ACC

      Audio system playing

      → Audio system changing modes

      2.0 V or higher

      → Below 1 V

    NG

    CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY) Click here

    OK

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

  2. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY)


    1. Disconnect the I67 navigation receiver assembly connector.

    2. Disconnect the I69 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
      I67-16 (MUT1) - I69-1 (MUTE) Always Below 1 Ω
      I67-16 (MUT1) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY


    1. Disconnect the I67 navigation receiver assembly connector.

    2. B000MFHE48
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Navigation Receiver Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      I67-16 (MUT1) - Body ground

      Ignition switch ACC

      Audio system playing

      		 2.0 V or higher
      Result
      Result Proceed to
      NG A
      OK (for TMMK Made) B
      OK (for TMC Made) C

    B

    REPLACE NAVIGATION RECEIVER ASSEMBLY (for TMMK Made) Click here

    C

    REPLACE NAVIGATION RECEIVER ASSEMBLY (for TMC Made) Click here

    A

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Click here