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AUDIO AND VISUAL SYSTEM Microphone Circuit

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DTC Code DTC Name
  Microphone Circuit
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DESCRIPTION

w/ Telematics Transceiver:


w/o Telematics Transceiver:


B004YA7E08
Table 2. w/o Telematics Transceiver
*a Telephone Microphone Assembly
*b Radio Receiver Assembly
*c Navigation ECU
Table 1. w/ Telematics Transceiver *a Telephone Microphone Assembly *b DCM (Telematics Transceiver) *c Radio Receiver Assembly *d Navigation ECU
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

When replacing the radio receiver assembly, always replace it with a new one.

If a radio receiver assembly which was installed to another vehicle is used, the following may occur:


  • A communication malfunction DTC may be stored.

  • The radio receiver assembly may not operate normally.

Tip:

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

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PROCEDURE


  1. Click here

    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

  2. Click here

    CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO NAVIGATION ECU)


    1. B004TO8

      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.

      Tip:

      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

  3. Click here

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


    1. B004TO8

      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.

      Tip:

      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

      REPAIR OR REPLACE HARNESS OR CONNECTOR (RADIO RECEIVER ASSEMBLY - NAVIGATION ECU)

    • NGClick here

      GO TO STEP 6

  4. Click here

    CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO NAVIGATION ECU)


    1. B004Y6O

      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.

      Tip:

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

    3. Push the recording switch and perform voice recording.

      Tip:

      • 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

  5. Click here

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


    1. B004Y6O

      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.

      Tip:

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

    3. Push the recording switch and perform voice recording.

      Tip:

      • 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

      REPAIR OR REPLACE HARNESS OR CONNECTOR (RADIO RECEIVER ASSEMBLY - NAVIGATION ECU)

    • NGClick here
  6. Click here

    CHECK VEHICLE TYPE


    1. Check the vehicle type.

      Result
      Result Proceed to
      w/ Telematics Transceiver A
      w/o Telematics Transceiver B

  7. Click here

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


    1. Disconnect the G54 radio receiver assembly connector.

    2. Disconnect the N15 telephone microphone assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G54-25 (SNS2) - N15-3 (SNS2) Always Below 1 Ω
      G54-25 (SNS2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. Click here

    CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - DCM [TELEMATICS TRANSCEIVER])


    1. Disconnect the G54 radio receiver assembly connector.

    2. Disconnect the G56 DCM (telematics transceiver) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G54-21 (MIN+) - G56-18 (MCO+) Always Below 1 Ω
      G54-22 (MIN-) - G56-19 (MCO-) Always Below 1 Ω
      G54-21 (MIN+) - Body ground Always 10 kΩ or higher
      G54-22 (MIN-) - Body ground Always 10 kΩ or higher
      G54-24 (SGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. Click here

    CHECK HARNESS AND CONNECTOR (DCM [TELEMATICS TRANSCEIVER] - TELEPHONE MICROPHONE ASSEMBLY)


    1. Disconnect the G56 DCM (telematics transceiver) connector.

    2. Disconnect the N15 telephone microphone assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G56-33 (MCVD) - N15-1 (MACC) Always Below 1 Ω
      G56-34 (MCI+) - N15-2 (MCO+) Always Below 1 Ω
      G56-35 (MCI-) - N15-4 (MCO-) Always Below 1 Ω
      G56-33 (MCVD) - Body ground Always 10 kΩ or higher
      G56-34 (MCI+) - Body ground Always 10 kΩ or higher
      G56-35 (MCI-) - Body ground Always 10 kΩ or higher
      G56-32 (SGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. Click here

    CHECK DCM (TELEMATICS TRANSCEIVER)


    1. B004XASC46
      *a

      Component with harness connected

      (DCM [Telematics Transceiver])

      Remove the DCM (telematics transceiver) 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
      G56-33 (MCVD) - Body ground Power 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
      G56-32 (SGND) - Body ground Always Below 1 Ω
      G56-35 (MCI-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

  11. *a Component with harness connected (Telephone Microphone Assembly)
    Click here

    CHECK TELEPHONE MICROPHONE ASSEMBLY (OUTPUT TO DCM [TELEMATICS TRANSCEIVER])


    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 N15-2 (MCO+) and N15-4 (MCO-).

      3. Turn the power 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 microphone case LH.

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

        Item Condition
        Measurement terminal N15-2 (MCO+) - N15-4 (MCO-)
        Tool setting 50 mV/DIV., 500 ms/DIV.
        Vehicle condition

        1. Power 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 microphone case LH.
        OK
        The waveform is similar to that shown in the illustration.
        Tip:

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

      Result
      Proceed to
      OK
      NG

  12. *a Component with harness connected (DCM [Telematics Transceiver])
    Click here

    CHECK DCM (TELEMATICS TRANSCEIVER) (OUTPUT TO RADIO RECEIVER ASSEMBLY)


    1. Check the output waveform.


      1. Remove the DCM (telematics transceiver) with the connector(s) still connected.

        Click here

      2. Connect an oscilloscope to terminal G56-18 (MCO+) and G56-19 (MCO-).

      3. Turn the power 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 microphone case LH.

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

        Item Condition
        Measurement terminal G56-18 (MCO+) - G56-19 (MCO-)
        Tool setting 50 mV/DIV., 500 ms/DIV.
        Vehicle condition

        1. Power 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 microphone case LH.
        OK
        The waveform is similar to that shown in the illustration.
        Tip:

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

      Result
      Proceed to
      OK
      NG

  13. Click here

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


    1. Disconnect the G54 radio receiver assembly connector.

    2. Disconnect the N15 telephone microphone assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G54-25 (SNS2) - N15-3 (SNS2) Always Below 1 Ω
      G54-23 (MACC) - N15-1 (MACC) Always Below 1 Ω
      G54-21 (MIN+) - N15-2 (MCO+) Always Below 1 Ω
      G54-22 (MIN-) - N15-4 (MCO-) Always Below 1 Ω
      G54-25 (SNS2) - Body ground Always 10 kΩ or higher
      G54-23 (MACC) - Body ground Always 10 kΩ or higher
      G54-21 (MIN+) - Body ground Always 10 kΩ or higher
      G54-22 (MIN-) - Body ground Always 10 kΩ or higher
      G54-24 (SGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  14. Click here

    CHECK RADIO RECEIVER ASSEMBLY


    1. B004TNBC19
      *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
      G54-23 (MACC) - Body ground Power 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
      G54-22 (MIN-) - Body ground Always Below 1 Ω
      G54-24 (SGND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

  15. *a Component with harness connected (Telephone Microphone Assembly)
    Click here

    CHECK TELEPHONE MICROPHONE ASSEMBLY (OUTPUT TO RADIO RECEIVER 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 N15-2 (MCO+) and N15-4 (MCO-).

      3. Turn the power 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 microphone case LH*1 or microphone case RH*2.


        • *1: for LHD

        • *2: for RHD

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

        Item Condition
        Measurement terminal N15-2 (MCO+) - N15-4 (MCO-)
        Tool setting 50 mV/DIV., 500 ms/DIV.
        Vehicle condition

        1. Power 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 microphone case LH*1 or microphone case RH*2.

        *1: for LHD

        *2: for RHD

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

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

      Result
      Proceed to
      OK
      NG