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Microphone Circuit [08/2020 - 10/2022]: 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 [10/2019 - 10/2022]

      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 [10/2019 - 10/2022]

    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 [10/2019 - 10/2022]

      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. Disconnect the G1 radio and display receiver assembly connector.
    2. Disconnect the G15 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+) Always Below 1 Ω
      G1-26 (MCO-) - G15-14 (MIC-) 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. Disconnect the navigation ECU connector.
      GTY982338Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Navigation ECU)
    2. Check the signal waveform according to the condition(s) in the table below.
      Item Condition
      Measurement terminal G15-13 (MIC+) - G15-14 (MIC-)
      Tool setting 50 mV/DIV., 500 ms/DIV.
      Vehicle condition
      1. Turn the ignition switch to ON.
      2. Sound is input to the map light assembly when the user is closer than 125 mm (4.92 in.) 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 [10/2019 - 10/2022]

    Result: 

    NG 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

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

  5. CHECK VEHICLE TYPE 
    1. Check the vehicle type.

      Result

      Result Proceed to
      For TMC Made and w/ Manual (SOS) Switch A
      For TMMC Made and w/ Manual (SOS) Switch B
      For TMC Made and w/o Manual (SOS) Switch C
      For TMMC Made and w/o Manual (SOS) Switch D

    Result: 

    B 

    See step  11

    Result: 

    C 

    See step  17

    Result: 

    D 

    See step  21

    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 P20 map light assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G2-25 (SNS2) - P20-6 (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 G131 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+) - G131-16 (MCO+) Always Below 1 Ω
      G2-22 (MIN-) - G131-32 (MCO-) Always Below 1 Ω
      G2-21 (MIN+) or G131-16 (MCO+) - Body ground Always 10 kΩ or higher
      G2-22 (MIN-) or G131-32 (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 G131 DCM (telematics transceiver) connector.
    2. Disconnect the P20 map light assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G131-5 (MCVD) - P20-9 (MACC) Always Below 1 Ω
      G131-6 (MCI+) - P20-8 (MCO+) Always Below 1 Ω
      G131-7 (MCI-) - P20-7 (MCO-) Always Below 1 Ω
      G131-5 (MCVD) - Body ground Always 10 kΩ or higher
      G131-6 (MCI+) - Body ground Always 10 kΩ or higher
      G131-7 (MCI-) - Body ground Always 10 kΩ or higher
      G131-23 (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.
      GTY913749Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (DCM [Telematics Transceiver])

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

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

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      G131-5 (MCVD) - Body ground Ignition switch ON 4 to 6 V
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G131-7 (MCI-) - Body ground Always Below 1 Ω
      G131-23 (SGND) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE DCM (TELEMATICS TRANSCEIVER) 

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

    Result: 

    OK 

    See step  10

  10. CHECK MAP LIGHT ASSEMBLY (OUTPUT TO DCM [TELEMATICS TRANSCEIVER]) 
    1. Check the output waveform.
      GTY895875Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (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 8 (MCO+) and 7 (MCO-) of the P20 map light assembly connector.
      3. Check the signal waveform according to the condition(s) in the table below.
        Item Condition
        Measurement terminal P20-8 (MCO+) - P20-7 (MCO-)
        Tool setting 50 mV/DIV., 500 ms/DIV.
        Vehicle condition
        1. Turn the ignition switch to ON.
        2. Sound is input to the map light assembly when the user is closer than 125 mm (4.92 in.) from the map light assembly sound holes.

        HINT: 

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

        OK

        The waveform is similar to that shown in the illustration.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    See step  16

    Result: 

    NG 

    See step  20

  11. 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

      W/ PANORAMIC MOON ROOF SYSTEM

      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
      W/O PANORAMIC MOON ROOF SYSTEM

      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  12

  12. 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 G131 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+) - G131-16 (MCO+) Always Below 1 Ω
      G2-22 (MIN-) - G131-32 (MCO-) Always Below 1 Ω
      G2-21 (MIN+) or G131-16 (MCO+) - Body ground Always 10 kΩ or higher
      G2-22 (MIN-) or G131-32 (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  13

  13. CHECK HARNESS AND CONNECTOR (DCM [TELEMATICS TRANSCEIVER] - MAP LIGHT ASSEMBLY) 
    1. Disconnect the G131 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

      W/ PANORAMIC MOON ROOF SYSTEM

      Tester Connection Condition Specified Condition
      G131-5 (MCVD) - P14-7 (MACC) Always Below 1 Ω
      G131-6 (MCI+) - P14-6 (MCO+) Always Below 1 Ω
      G131-7 (MCI-) - P14-5 (MCO-) Always Below 1 Ω
      G131-5 (MCVD) - Body ground Always 10 kΩ or higher
      G131-6 (MCI+) - Body ground Always 10 kΩ or higher
      G131-7 (MCI-) - Body ground Always 10 kΩ or higher
      G131-23 (SGND) - Body ground Always 10 kΩ or higher
      W/O PANORAMIC MOON ROOF SYSTEM

      Tester Connection Condition Specified Condition
      G131-5 (MCVD) - P14-3 (MACC) Always Below 1 Ω
      G131-6 (MCI+) - P14-4 (MCO+) Always Below 1 Ω
      G131-7 (MCI-) - P14-6 (MCO-) Always Below 1 Ω
      G131-5 (MCVD) - Body ground Always 10 kΩ or higher
      G131-6 (MCI+) - Body ground Always 10 kΩ or higher
      G131-7 (MCI-) - Body ground Always 10 kΩ or higher
      G131-23 (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  14

  14. CHECK DCM (TELEMATICS TRANSCEIVER) 
    1. Remove the DCM (telematics transceiver) with the connector(s) still connected.
      GTY913749Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (DCM [Telematics Transceiver])

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

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

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      G131-5 (MCVD) - Body ground Ignition switch ON 4 to 6 V
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G131-7 (MCI-) - Body ground Always Below 1 Ω
      G131-23 (SGND) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE DCM (TELEMATICS TRANSCEIVER) 

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

    Result: 

    OK 

    See step  15

  15. CHECK MAP LIGHT ASSEMBLY (OUTPUT TO DCM [TELEMATICS TRANSCEIVER]) 
    1. *1: w/ Panoramic Moon Roof System
    2. *2: w/o Panoramic Moon Roof System
    1. Check the output waveform.
      GTY841683Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A w/ Panoramic Moon Roof System
      *B w/o Panoramic Moon Roof System
      *a Component with harness connected
      (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+)*1 or 4 (MCO+)*2 and 5 (MCO-)*1 or 6 (MCO-)*2 of the P14 map light assembly connector.
      3. 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 ON.
        2. Sound is input to the map light assembly when the user is closer than 125 mm (4.92 in.) from the map light assembly sound holes.

        HINT: 

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

      OK

      The waveform is similar to that shown in the illustration.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  24

    Result: 

    OK 

    See step  16

  16. CHECK DCM (TELEMATICS TRANSCEIVER) (OUTPUT TO RADIO AND DISPLAY RECEIVER ASSEMBLY) 
    1. Check the output waveform.
      GTY845732Courtesy 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 [10/2019 - 10/2022]

      2. Connect an oscilloscope to terminals 16 (MCO+) and 32 (MCO-) of the G131 DCM (telematics transceiver) connector.
      3. Check the signal waveform according to the condition(s) in the table below.
        Item Condition
        Measurement terminal G131-16 (MCO+) - G131-32 (MCO-)
        Tool setting 50 mV/DIV., 500 ms/DIV.
        Vehicle condition
        1. Turn the ignition switch to ON.
        2. Sound is input to the map light assembly when the user is closer than 125 mm (4.92 in.) 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 [10/2019 - 10/2022]

  17. 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 P20 map light assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G2-25 (SNS2) - P20-6 (SNS2) Always Below 1 Ω
      G2-23 (MACC) - P20-9 (MACC) Always Below 1 Ω
      G2-21 (MIN+) - P20-8 (MCO+) Always Below 1 Ω
      G2-22 (MIN-) - P20-7 (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  18

  18. 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 ON 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  19

  19. CHECK MAP LIGHT ASSEMBLY (OUTPUT TO DCM [TELEMATICS TRANSCEIVER]) 
    1. Check the output waveform.
      GTY895875Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *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 8 (MCO+) and 7 (MCO-) of the P20 map light assembly connector.
      3. Check the signal waveform according to the condition(s) in the table below.
        Item Condition
        Measurement terminal P20-8 (MCO+) - P20-7 (MCO-)
        Tool setting 50 mV/DIV., 500 ms/DIV.
        Vehicle condition
        1. Turn the ignition switch to ON.
        2. Sound is input to the map light assembly when the user is closer than 125 mm (4.92 in.) from the map light assembly sound holes.

        HINT: 

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

        OK

        The waveform is similar to that shown in the illustration.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE RADIO AND DISPLAY ASSEMBLY 

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

    Result: 

    NG 

    See step  20

  20. INSPECT MAP LIGHT ASSEMBLY 
    1. Remove the map light assembly.
      GTY891596Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *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

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

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE TELEPHONE MICROPHONE ASSEMBLY 

    Refer to REMOVAL [11/2018 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022]

    Result: 

    NG 

    REPLACE MAP LIGHT ASSEMBLY 

    Refer to REMOVAL [11/2018 - ]

  21. 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

      W/ PANORAMIC MOON ROOF SYSTEM

      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
      W/O PANORAMIC MOON ROOF SYSTEM

      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  22

  22. 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 ON 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  23

  23. CHECK MAP LIGHT ASSEMBLY (OUTPUT TO RADIO AND DISPLAY RECEIVER) 
    1. *1: w/ Panoramic Moon Roof System

      *2: w/o Panoramic Moon Roof System

    1. Check the output waveform.
      GTY841684Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A w/ Panoramic Moon Roof System
      *B w/o Panoramic Moon Roof System
      *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+)*1 or 4 (MCO+)*2 and 5 (MCO-)*1 or 6 (MCO-)*2 of the P14 map light assembly connector.
      3. 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 ON.
        2. Sound is input to the map light assembly when the user is closer than 125 mm (4.92 in.) 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  24

  24. INSPECT MAP LIGHT ASSEMBLY 
    1. Remove the map light assembly.
      GTY943877Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A w/ Panoramic Moon Roof System
      *B w/o Panoramic Moon Roof System
      *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

      W/ PANORAMIC MOON ROOF SYSTEM

      Tester Connection Condition Specified Condition
      4 (SNS2) - C-1 (SNS2) Always Below 1 Ω
      7 (MACC) - C-5 (MACC) Always Below 1 Ω
      6 (MCO+) - C-3 (MIC+) Always Below 1 Ω
      5 (MCO-) - C-2 (MIC-) Always Below 1 Ω
      C-1 (SNS2) - C-2 (MIC-) Always 10 kΩ or higher
      C-1 (SNS2) - C-3 (MIC+) Always 10 kΩ or higher
      C-1 (SNS2) - C-5 (MACC) Always 10 kΩ or higher
      C-2 (MIC-) - C-3 (MIC+) Always 10 kΩ or higher
      C-2 (MIC-) - C-5 (MACC) Always 10 kΩ or higher
      C-3 (MIC+) - C-5 (MACC) Always 10 kΩ or higher
      W/O PANORAMIC MOON ROOF SYSTEM

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

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE TELEPHONE MICROPHONE ASSEMBLY 

    Refer to REMOVAL [11/2018 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022]

    Result: 

    NG 

    REPLACE MAP LIGHT ASSEMBLY 

    Refer to REMOVAL [11/2018 - ]

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