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Microphone Circuit [11/2018 - 10/2019]: Procedure

WARNING: This page is about a different car, the 2022 Toyota RAV4, 2021 Toyota RAV4, 2020 Toyota RAV4, and 2019 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO NAVIGATION ECU) 
    1. Enter the "Microphone Check" screen. Refer to Check Microphone (Input to navigation ECU) in Operation Check.

      Refer to OPERATION CHECK [11/2018 - 10/2019]

      GTY434237Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. When voice is input into the microphone, check that the microphone input level meter changes according to the input voice.

      OK

      Check result is normal.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    Refer to PROBLEM SYMPTOMS TABLE [11/2018 - 02/2019] , or refer to PROBLEM SYMPTOMS TABLE [02/2019 - 10/2019]

    Result: 

    NG 

    See step  2

  2. CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO RADIO AND DISPLAY RECEIVER ASSEMBLY) 
    1. Enter the "Microphone Check" screen. Refer to Check Microphone (Input to radio and display receiver assembly) in Operation Check.

      Refer to OPERATION CHECK [11/2018 - 10/2019]

      GTY434237Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. When voice is input into the microphone, check that the microphone input level meter changes according to the input voice.

      OK

      Check result is normal.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  5

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NAVIGATION ECU) 
    1. *1: Only for models with the vehicle identification number on the certification label ending with the character A.

      *2: Except models with the vehicle identification number on the certification label ending with the character A.

    1. Disconnect the G1 radio and display receiver assembly connector.
    2. Disconnect the G15*1 or H7*2 navigation ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G1-25 (MCO+) - G15-13 (MIC+)*1 Always Below 1 Ω
      G1-25 (MCO+) - H7-13 (MIC+)*2 Always Below 1 Ω
      G1-26 (MCO-) - G15-14 (MIC-)*1 Always Below 1 Ω
      G1-26 (MCO-) - H7-14 (MIC-)*2 Always Below 1 Ω
      G1-25 (MCO+) - Body ground Always 10 kΩ or higher
      G1-26 (MCO-) - Body ground Always 10 kΩ or higher
      G1-24 (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. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY (OUTPUT TO NAVIGATION ECU) 
    1. *1: Only for models with the vehicle identification number on the certification label ending with the character A.

      *2: Except models with the vehicle identification number on the certification label ending with the character A.

    1. Disconnect the navigation ECU connector.
      GTY839690Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A Only for models with the vehicle identification number on the certification label ending with the character A.
      *B Except models with the vehicle identification number on the certification label ending with the character A.
      *a Front view of wire harness connector
      (to Navigation ECU)
    2. Turn the ignition switch to ACC.
    3. Check the signal waveform according to the condition(s) in the table below.
      Item Condition
      Measurement terminal G15-13 (MIC+) - G15-14 (MIC-)*1
      H7-13 (MIC+) - H7-14 (MIC-)*2
      Tool setting 50 mV/DIV., 500 ms/DIV.
      Vehicle condition
      1. Turn the ignition switch to ACC.
      2. Sound is input to the map light assembly when the user is closer than 125 mm from the map light assembly sound holes.

      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 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    Refer to PROBLEM SYMPTOMS TABLE [11/2018 - 02/2019] , or refer to PROBLEM SYMPTOMS TABLE [02/2019 - 10/2019]

    Result: 

    NG 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

    Refer to REMOVAL [11/2018 - 10/2022]

  5. CHECK MODEL 
    1. Choose the model to be inspected.

      Result

      Result Proceed to
      w/ Manual (SOS) Switch A
      w/o Manual (SOS) Switch B

    Result: 

    B 

    See step  12

    Result: 

    A 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY) 
    1. Disconnect the G2 radio and display receiver assembly connector.
    2. Disconnect the P14 map light assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      FOR TMC MADE:

      Tester Connection Condition Specified Condition
      G2-25 (SNS2) - P14-4 (SNS2) Always Below 1 Ω
      G2-25 (SNS2) - Body ground Always 10 kΩ or higher
      FOR TMMC MADE:

      Tester Connection Condition Specified Condition
      G2-25 (SNS2) - P14-5 (SNS2) Always Below 1 Ω
      G2-25 (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 G2 radio and display receiver assembly connector.
    2. Disconnect the G9 DCM (telematics transceiver) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G2-21 (MIN+) - G9-18 (MCO+) Always Below 1 Ω
      G2-22 (MIN-) - G9-19 (MCO-) Always Below 1 Ω
      G2-21 (MIN+) or G9-18 (MCO+) - Body ground Always 10 kΩ or higher
      G2-22 (MIN-) or G9-19 (MCO-) - Body ground Always 10 kΩ or higher
      G2-24 (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] - MAP LIGHT ASSEMBLY) 
    1. Disconnect the G9 DCM (telematics transceiver) connector.
    2. Disconnect the P14 map light assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      FOR TMC MADE:

      Tester Connection Condition Specified Condition
      G9-33 (MCVD) - P14-7 (MACC) Always Below 1 Ω
      G9-34 (MCI+) - P14-6 (MCO+) Always Below 1 Ω
      G9-35 (MCI-) - P14-5 (MCO-) Always Below 1 Ω
      G9-33 (MCVD) - Body ground Always 10 kΩ or higher
      G9-34 (MCI+) - Body ground Always 10 kΩ or higher
      G9-35 (MCI-) - Body ground Always 10 kΩ or higher
      G9-32 (SGND) - Body ground Always 10 kΩ or higher
      FOR TMMC MADE:

      Tester Connection Condition Specified Condition
      G9-33 (MCVD) - P14-3 (MACC) Always Below 1 Ω
      G9-34 (MCI+) - P14-4 (MCO+) Always Below 1 Ω
      G9-35 (MCI-) - P14-6 (MCO-) Always Below 1 Ω
      G9-33 (MCVD) - Body ground Always 10 kΩ or higher
      G9-34 (MCI+) - Body ground Always 10 kΩ or higher
      G9-35 (MCI-) - Body ground Always 10 kΩ or higher
      G9-32 (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.
      GTY905733Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (DCM [Telematics Transceiver])

      Refer to REMOVAL [11/2018 - 10/2019]

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

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      G9-33 (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
      G9-35 (MCI-) - Body ground Always Below 1 Ω
      G9-32 (SGND) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE DCM (TELEMATICS TRANSCEIVER) 

    Refer to REMOVAL [11/2018 - 10/2019]

    Result: 

    OK 

    See step  10

  10. CHECK MAP LIGHT ASSEMBLY (OUTPUT TO DCM [TELEMATICS TRANSCEIVER]) 
    1. *1: for TMC Made

      *2: for TMMC Made

    1. Check the output waveform.
      GTY1250490Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A For TMC Made
      *B For TMMC Made
      *a Front view of wire harness connector
      (to Map Light Assembly)
      1. Remove the map light assembly with the connector(s) still connected.

        Refer to REMOVAL [11/2018 - ]

      2. Connect an oscilloscope to terminals 6 (MCO+) and 5 (MCO-)*1 or 4 (MCO+) and 6 (MCO-)*2 of the P14 map light assembly connector.
      3. Turn the ignition switch to ACC.
    2. Check the signal waveform according to the condition(s) in the table below.
      Item Condition
      Measurement terminal P14-6 (MCO+) - P14-5 (MCO-)*1
      P14-4 (MCO+) - P14-6 (MCO-)*2
      Tool setting 50 mV/DIV., 500 ms/DIV.
      Vehicle condition
      1. Turn the ignition switch to ACC.
      2. Sound is input to the map light assembly when the user is closer than 125 mm from the map light assembly sound holes.

      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 

    See step  15

    Result: 

    OK 

    See step  11

  11. CHECK DCM (TELEMATICS TRANSCEIVER) (OUTPUT TO RADIO AND DISPLAY RECEIVER ASSEMBLY) 
    1. Check the output waveform.
      GTY842025Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      DCM (Telematics Transceiver)
      1. Remove the DCM (telematics transceiver) with the connector(s) still connected.

        Refer to REMOVAL [11/2018 - 10/2019]

      2. Connect an oscilloscope to terminals 18 (MCO+) and 19 (MCO-) of the G9 DCM (telematics transceiver) connector.
      3. Turn the ignition switch to ACC.
      4. Check the signal waveform according to the condition(s) in the table below.
        Item Condition
        Measurement terminal G9-18 (MCO+) - G9-19 (MCO-)
        Tool setting 50 mV/DIV., 500 ms/DIV.
        Vehicle condition
        1. Turn the ignition switch to ACC.
        2. Sound is input to the map light assembly when the user is closer than 125 mm from the map light assembly sound holes.

        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 ASSEMBLY 

    Refer to REMOVAL [11/2018 - 10/2022]

    Result: 

    NG 

    REPLACE TELEPHONE TRANSCEIVER ASSEMBLY 

    Refer to REMOVAL [11/2018 - 10/2019]

  12. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY) 
    1. Disconnect the G2 radio and display receiver assembly connector.
    2. Disconnect the P14 map light assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      FOR TMC MADE:

      Tester Connection Condition Specified Condition
      G2-25 (SNS2) - P14-4 (SNS2) Always Below 1 Ω
      G2-23 (MACC) - P14-7 (MACC) Always Below 1 Ω
      G2-21 (MIN+) - P14-6 (MCO+) Always Below 1 Ω
      G2-22 (MIN-) - P14-5 (MCO-) Always Below 1 Ω
      G2-25 (SNS2) - Body ground Always 10 kΩ or higher
      G2-23 (MACC) - Body ground Always 10 kΩ or higher
      G2-21 (MIN+) - Body ground Always 10 kΩ or higher
      G2-22 (MIN-) - Body ground Always 10 kΩ or higher
      G2-24 (SGND) - Body ground Always 10 kΩ or higher
      FOR TMMC MADE:

      Tester Connection Condition Specified Condition
      G2-25 (SNS2) - P14-5 (SNS2) Always Below 1 Ω
      G2-23 (MACC) - P14-3 (MACC) Always Below 1 Ω
      G2-21 (MIN+) - P14-4 (MCO+) Always Below 1 Ω
      G2-22 (MIN-) - P14-6 (MCO-) Always Below 1 Ω
      G2-25 (SNS2) - Body ground Always 10 kΩ or higher
      G2-23 (MACC) - Body ground Always 10 kΩ or higher
      G2-21 (MIN+) - Body ground Always 10 kΩ or higher
      G2-22 (MIN-) - Body ground Always 10 kΩ or higher
      G2-24 (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  13

  13. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY 
    1. Remove the radio and display receiver assembly with the connector(s) still connected.
      GTY854591Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Radio and Display Receiver Assembly)

      Refer to REMOVAL [11/2018 - 10/2022]

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

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      G2-23 (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
      G2-24 (SGND) - Body ground Always Below 1 Ω
      G2-22 (MIN-) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

    Refer to REMOVAL [11/2018 - 10/2022]

    Result: 

    OK 

    See step  14

  14. CHECK MAP LIGHT ASSEMBLY (OUTPUT TO RADIO AND DISPLAY RECEIVER) 
    1. *1: for TMC Made

      *2: for TMMC Made

    1. Check the output waveform.
      GTY1250491Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A For TMC Made
      *B For TMMC Made
      *a Front view of wire harness connector
      (to Map Light Assembly)
      1. Remove the map light assembly with the connector(s) still connected.

        Refer to REMOVAL [11/2018 - ]

      2. Connect an oscilloscope to terminals 6 (MCO+) and 5 (MCO-)*1 or 4 (MCO+) and 6 (MCO-)*2 of the P14 map light assembly connector.
      3. Turn the ignition switch to ACC.
      4. Check the signal waveform according to the condition(s) in the table below.
        Item Condition
        Measurement terminal P14-6 (MCO+) - P14-5 (MCO-)*1
        P14-4 (MCO+) - P14-6 (MCO-)*2
        Tool setting 50 mV/DIV., 500 ms/DIV.
        Vehicle condition
        1. Turn the ignition switch to ACC.
        2. Sound is input to the map light assembly when the user is closer than 125 mm from the map light assembly sound holes.

        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 ASSEMBLY 

    Refer to REMOVAL [11/2018 - 10/2022]

    Result: 

    NG 

    See step  15

  15. INSPECT MAP LIGHT ASSEMBLY 
    1. Remove the map light assembly.
      GTY1250557Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A For TMC Made
      *B For TMMC Made
      *a Component without harness connected
      (Map Light Assembly [Wire Harness Side])
      *b Component without harness connected
      (Map Light Assembly [Telephone Microphone Assembly Side])

      Refer to REMOVAL [11/2018 - ]

    2. Disconnect the telephone microphone assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      FOR TMC MADE:

      Tester Connection Condition Specified Condition
      P14-4 (SNS2) - C-1 (SNS2) Always Below 1 Ω
      P14-7 (MACC) - C-5 (MACC) Always Below 1 Ω
      P14-6 (MCO+) - C-3 (MIC+) Always Below 1 Ω
      P14-5 (MCO-) - C-2 (MIC-) Always Below 1 Ω
      P14-4 (SNS2) - P14-5 (MCO-) Always 10 kΩ or higher
      P14-4 (SNS2) - P14-6 (MCO+) Always 10 kΩ or higher
      P14-4 (SNS2) - P14-7 (MACC) Always 10 kΩ or higher
      P14-5 (MCO-) - P14-6 (MCO+) Always 10 kΩ or higher
      P14-5 (MCO-) - P14-7 (MACC) Always 10 kΩ or higher
      P14-6 (MCO+) - P14-7 (MACC) Always 10 kΩ or higher
      FOR TMMC MADE:

      Tester Connection Condition Specified Condition
      P14-5 (SNS2) - C-1 (SNS2) Always Below 1 Ω
      P14-3 (MACC) - C-5 (MACC) Always Below 1 Ω
      P14-4 (MCO+) - C-3 (MIC+) Always Below 1 Ω
      P14-6 (MCO-) - C-2 (MIC-) Always Below 1 Ω
      P14-5 (SNS2) - P14-6 (MCO-) Always 10 kΩ or higher
      P14-5 (SNS2) - P14-4 (MCO+) Always 10 kΩ or higher
      P14-5 (SNS2) - P14-3 (MACC) Always 10 kΩ or higher
      P14-6 (MCO-) - P14-4 (MCO+) Always 10 kΩ or higher
      P14-6 (MCO-) - P14-3 (MACC) Always 10 kΩ or higher
      P14-4 (MCO+) - P14-3 (MACC) Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE TELEPHONE MICROPHONE ASSEMBLY 

    Refer to REMOVAL [11/2018 - 12/2021]

    Result: 

    NG 

    REPLACE MAP LIGHT ASSEMBLY 

    Refer to REMOVAL [11/2018 - ]

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