NAVIGATION SYSTEM(for Navigation Receiver Type) Microphone Circuit between Microphone and Navigation Receiver Assembly

DESCRIPTION

The navigation receiver assembly and map light assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines.

Using this circuit, the navigation receiver assembly sends power to the map light assembly (telephone microphone assembly), and the map light assembly (telephone microphone assembly) sends microphone signals to the navigation receiver assembly.

WIRING DIAGRAM

A0026VYE21
*a (Shielded)
*b Map Light Assembly (Telephone Microphone Assembly)
*c Navigation Receiver Assembly

PROCEDURE


  1. CHECK MICROPHONE (OPERATION CHECK)


    1. A0028AB

      Enter the "Microphone Check" screen. Refer to Check Microphone in Operation Check.

      Click here

    2. When a voice is input into the microphone, check that the microphone input level meter changes according to the input voice.

    3. Push the recording switch and perform voice recording.

      Tech Tips


      • Select the recording switch with the blower motor of the air conditioning system stopped. If an outlet of the air conditioning system is facing the microphone, noise may be recorded.

      • Voice can be recorded for up to 5 seconds.

    4. Check that the recording indicator remains on while recording and that the recorded voice is played normally without noise or distortion.

      OK
      All check results are normal.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the F116 navigation receiver assembly connector.

    2. Disconnect the S1 map light assembly (telephone microphone assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F116-6 (SNS2) - S1-13 (SNS2) Always Below 1 Ω
      F116-4 (MACC) - S1-3 (MACC) Always Below 1 Ω
      F116-5 (MIN+) - S1-2 (MCO+) Always Below 1 Ω
      F116-19 (MIN-) - S1-4 (MCO-) Always Below 1 Ω
      F116-6 (SNS2) - Body ground Always 10 kΩ or higher
      F116-4 (MACC) - Body ground Always 10 kΩ or higher
      F116-5 (MIN+) - Body ground Always 10 kΩ or higher
      F116-19 (MIN-) - Body ground Always 10 kΩ or higher
      F116-18 (SGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT NAVIGATION RECEIVER ASSEMBLY


    1. Reconnect the F116 navigation receiver assembly connector.

    2. Reconnect the S1 map light assembly (telephone microphone assembly) connector.

    3. A002AMUC72
      *a

      Component with harness connected

      (Navigation Receiver Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F116-4 (MACC) - Body ground Engine switch on (ACC) 4 to 6 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F116-18 (SGND) - Body ground Always Below 1 Ω
      F116-19 (MIN-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    OK

  4. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


    1. Remove the map light assembly (telephone microphone assembly).

      Click here

    2. A0028AIC02
      *a

      Component without harness connected

      (Map Light Assembly (Telephone Microphone Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4 (MCO-) - 13 (SNS2) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) Click here

    OK

  5. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


    1. Reconnect the F116 navigation receiver assembly connector.

    2. Reconnect the S1 map light assembly (telephone microphone assembly) connector.

    3. Turn the engine switch on (ACC).

    4. A002CB2C03
      *a

      Component with harness connected

      (Map Light Assembly (Telephone Microphone Assembly))

      Connect an oscilloscope to terminals 2 (MCO+) and 4 (MCO-) of the S1 map light assembly (telephone microphone assembly) connector.

    5. Check the waveform of the map light assembly (telephone microphone assembly) using the oscilloscope.

      Result
      Result Proceed to
      A waveform synchronized with the voice input to the map light assembly (telephone microphone assembly) is output. A
      A waveform synchronized with the voice input to the map light assembly (telephone microphone assembly) is not output. B

    A

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

    B

    REPLACE MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) Click here