NAVIGATION SYSTEM Microphone Circuit

DESCRIPTION


WIRING DIAGRAM

B000XLXE01
*a Telephone Microphone Assembly
*b Radio Receiver Assembly
*c Navigation ECU

CAUTION / NOTICE / HINT

Note

The following malfunctions may occur if a radio receiver assembly from another vehicle is installed to this vehicle. Therefore, when replacing the radio receiver assembly, be sure to replace it with new one.


  • Communication malfunction DTC is output

  • Does not operate normally

Tech Tips

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. CHECK VEHICLE TYPE


    1. Check the vehicle type. Refer to Check Microphone (Input to navigation ECU) in Operation Check.

      Click here

      Result
      Result Proceed to
      w/o Recording Function A
      w/ Recording Function B

    B
    A
  2. CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO NAVIGATION ECU)


    1. B000X0Q

      Enter the "Microphone Check" screen. Refer to Check Microphone (Input to navigation ECU) in Operation Check.

      Click here

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

      Tech Tips

      The microphone is active at all times when "Microphone Check" screen is displayed.

      OK
      Microphone input level meter changes according to the input voice.
      Result
      Proceed to
      OK
      NG

    OK
    NG
  3. CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO RADIO RECEIVER ASSEMBLY)


    1. B000X0Q

      Enter the "Microphone Check" screen. Refer to Check Microphone (Input to radio receiver assembly) in Operation Check.

      Click here

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

      Tech Tips

      The microphone is active at all times when "Microphone Check" screen is displayed.

      OK
      Microphone input level meter changes according to the input voice.
      Result
      Proceed to
      OK
      NG

    OK
    NG
  4. CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO NAVIGATION ECU)


    1. B000VI8

      Enter the "Microphone Check" screen. Refer to Check Microphone (Input to navigation ECU) in Operation Check.

      Click here

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

      Tech Tips

      The microphone is active at all times when "Microphone Check" screen is displayed.

    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
    NG
  5. CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO RADIO RECEIVER ASSEMBLY)


    1. B000VI8

      Enter the "Microphone Check" screen. Refer to Check Microphone (Input to radio receiver assembly) in Operation Check.

      Click here

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

      Tech Tips

      The microphone is active at all times when "Microphone Check" screen is displayed.

    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
    NG
  6. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY)


    1. Disconnect the P46 radio receiver assembly connector.

    2. Disconnect the Z5 telephone microphone assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P46-25 (SNS2) - Z5-3 (SNS2) Always Below 1 Ω
      P46-23 (MACC) - Z5-1 (MACC) Always Below 1 Ω
      P46-21 (MIN+) - Z5-2 (MCO+) Always Below 1 Ω
      P46-22 (MIN-) - Z5-4 (MCO-) Always Below 1 Ω
      P46-25 (SNS2) - Body ground Always 10 kΩ or higher
      P46-23 (MACC) - Body ground Always 10 kΩ or higher
      P46-21 (MIN+) - Body ground Always 10 kΩ or higher
      P46-22 (MIN-) - Body ground Always 10 kΩ or higher
      P46-24 (SGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG
    OK
  7. CHECK RADIO RECEIVER ASSEMBLY


    1. B000VN9C05
      *a

      Component with harness connected

      (Radio Receiver Assembly)

      Remove the radio receiver assembly with the connector(s) still connected.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      P46-23 (MACC) - Body ground Engine switch on (ACC) 4 to 6 V
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P46-22 (MIN-) - Body ground Always Below 1 Ω
      P46-24 (SGND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG
    OK
  8. CHECK TELEPHONE MICROPHONE ASSEMBLY (OUTPUT TO RADIO RECEIVER ASSEMBLY)

    B000V5YC07
    *a

    Component with harness connected

    (Telephone Microphone Assembly)


    1. Check the output waveform.


      1. Remove the telephone microphone assembly with the connector(s) still connected.

        Click here

      2. Connect an oscilloscope to terminal Z5-2 (MCO+) and Z5-4 (MCO-).

      3. Turn the engine switch on (ACC).

      4. Sound is input to the telephone microphone assembly when the user is closer than 125 mm from the telephone microphone assembly sound holes in the roof headlining holder cover.

      5. Check the signal waveform according to the condition(s) in the table below.

        Item Condition
        Measurement terminal Z5-2 (MCO+) - Z5-4 (MCO-)
        Tool setting 50 mV/DIV., 500 ms/DIV.
        Vehicle condition
        1. Engine switch on (ACC)

        2. Sound is input to the telephone microphone assembly when the user is closer than 125 mm from the telephone microphone assembly sound holes in the roof headlining holder cover.

        OK
        The waveform is similar to that shown in the illustration.

        Tech Tips

        The oscilloscope waveform shown in the illustration is an example for reference only.

      Result
      Proceed to
      OK
      NG

    OK
    NG