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Microphone Circuit [12/2019 - 10/2022]: Procedure

  1. CHECK MICROPHONE (OPERATION CHECK) 
    1. Enter the "Microphone Check" screen. Refer to Check Microphone (Input to radio and display receiver assembly) in Operation Check.
      GTY434237Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Refer to OPERATION CHECK [12/2019 - 10/2022]

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

      OK

      Check results are normal.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [12/2019 - 10/2022] 

    Result: 

    NG 

    See step  2

  2. CHECK MODEL 
    1. Check the model to be inspected.

      Result

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

    Result: 

    B 

    See step  6

    Result: 

    A 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY) 
    1. Disconnect the H2 radio and display receiver assembly connector.
    2. Disconnect the R12 telephone microphone assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H2-25 (SNS2) - R12-3 (SNS2) Always Below 1 Ω
      H2-23 (MACC) - R12-1 (MACC) Always Below 1 Ω
      H2-21 (MIN+) - R12-2 (MCO+) Always Below 1 Ω
      H2-22 (MIN-) - R12-4 (MCO-) Always Below 1 Ω
      H2-25 (SNS2) or R12-3 (SNS2) - Body ground Always 10 kΩ or higher
      H2-23 (MACC) or R12-1 (MACC) - Body ground Always 10 kΩ or higher
      H2-21 (MIN+) or R12-2 (MCO+) - Body ground Always 10 kΩ or higher
      H2-22 (MIN-) or R12-4 (MCO-) - Body ground Always 10 kΩ or higher
      H2-24 (SGND) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY 
    1. Remove the radio and display receiver assembly with the connector(s) still connected.
      GTY839635Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Radio and Display Receiver Assembly)
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      H2-23 (MACC) - Body ground Ignition switch 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
      H2-22 (MIN-) - Body ground Always Below 1 Ω
      H2-24 (SGND) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022] 

    Result: 

    OK 

    See step  5

  5. CHECK TELEPHONE MICROPHONE ASSEMBLY (OUTPUT TO RADIO AND DISPLAY RECEIVER ASSEMBLY) 
    GTY924382Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *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.

        Refer to REMOVAL [12/2019 - 10/2022]

      2. Connect an oscilloscope to terminal R12-2 (MCO+) and R12-4 (MCO-).
      3. Turn the ignition switch to 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 R12-2 (MCO+) - R12-4 (MCO-)
        Tool setting 50 mV/DIV., 500 ms/DIV.
        Vehicle condition
        1. Turn the ignition switch to 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.

        HINT: 

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

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022] 

    Result: 

    NG 

    REPLACE TELEPHONE MICROPHONE ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022] 

  6. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY) 
    1. Disconnect the H2 radio and display receiver assembly connector.
    2. Disconnect the R12 telephone microphone assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H2-25 (SNS2) - R12-3 (SNS2) Always Below 1 Ω
      H2-25 (SNS2) or R12-3 (SNS2) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) 
    1. Disconnect the H2 radio and display receiver assembly connector.
    2. Disconnect the H11 DCM (telematics transceiver) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H2-21 (MIN+) - H11-16 (MCO+) Always Below 1 Ω
      H2-22 (MIN-) - H11-32 (MCO-) Always Below 1 Ω
      H2-21 (MIN+) or H11-16 (MCO+) - Body ground Always 10 kΩ or higher
      H2-22 (MIN-) or H11-32 (MCO-) - Body ground Always 10 kΩ or higher
      H2-24 (SGND) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - TELEPHONE MICROPHONE ASSEMBLY) 
    1. Disconnect the H11 DCM (telematics transceiver) connector.
    2. Disconnect the R12 telephone microphone assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H11-5 (MCVD) - R12-1 (MACC) Always Below 1 Ω
      H11-6 (MCI+) - R12-2 (MCO+) Always Below 1 Ω
      H11-7 (MCI-) - R12-4 (MCO-) Always Below 1 Ω
      H11-5 (MCVD) or R12-1 (MACC) - Body ground Always 10 kΩ or higher
      H11-6 (MCI+) or R12-2 (MCO+) - Body ground Always 10 kΩ or higher
      H11-7 (MCI-) or R12-4 (MCO-) - Body ground Always 10 kΩ or higher
      H11-23 (SGND) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  9

  9. CHECK DCM (TELEMATICS TRANSCEIVER) 
    1. Remove the DCM (telematics transceiver) with the connector(s) still connected.
      GTY857804Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (DCM (Telematics Transceiver))
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      H11-5 (MCVD) - Body ground Ignition switch 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
      H11-23 (SGND) - Body ground Always Below 1 Ω
      H11-7 (MCI-) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to  REMOVAL [12/2019 - 10/2022] 

    Result: 

    OK 

    See step  10

  10. CHECK TELEPHONE MICROPHONE ASSEMBLY (OUTPUT TO DCM (TELEMATICS TRANSCEIVER)) 
    GTY924383Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *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.

        Refer to REMOVAL [12/2019 - 10/2022]

      2. Connect an oscilloscope to terminal R12-2 (MCO+) and R12-4 (MCO-).
      3. Turn the ignition switch to 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 R12-2 (MCO+) - R12-4 (MCO-)
        Tool setting 50 mV/DIV., 500 ms/DIV.
        Vehicle condition
        1. Turn the ignition switch to 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.

        HINT: 

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

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE TELEPHONE MICROPHONE ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022] 

    Result: 

    OK 

    See step  11

  11. CHECK DCM (TELEMATICS TRANSCEIVER) (OUTPUT TO RADIO AND DISPLAY RECEIVER ASSEMBLY) 
    GTY853098Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Component with harness connected
    (DCM (Telematics Transceiver))
    1. Check the output waveform.
      1. Remove the DCM (telematics transceiver) with the connector(s) still connected.

        Refer to REMOVAL [12/2019 - 10/2022]

      2. Connect an oscilloscope to terminal H11-16 (MCO+) and H11-32 (MCO-).
      3. Turn the ignition switch to 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 H11-16 (MCO+) - H11-32 (MCO-)
        Tool setting 50 mV/DIV., 500 ms/DIV.
        Vehicle condition
        1. Turn the ignition switch to 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.

        HINT: 

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

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022] 

    Result: 

    NG 

    REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to  REMOVAL [12/2019 - 10/2022] 

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