DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Audio / Video System - Circuit Tests & Symptom Tests (2 Of 2) >> Audio And Visual System >> Microphone Circuit [10/2022 - ] >> Procedure

Microphone Circuit [10/2022 - ]: Procedure

  1. CHECK MODEL 

    Result

    Result Proceed to
    w/ DCM (Telematics Transceiver) A
    w/o DCM (Telematics Transceiver B

    Result: 

    B 

    See step  15

    Result: 

    A 

    See step  2

  2. CHECK MICROPHONE 
    1. Enter diagnostic mode.
      GTY1069377Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Mic 1 Input Level
      *b Mic 2 Input Level

      Refer to DIAGNOSIS SYSTEM [10/2022 - ]

    2. Select "Function Check/Setting" from the "Service Menu" screen.
    3. Select "Microphone Check" from the "Function Check/Setting I" screen.
    4. Speak into each microphone assembly and check the microphone input level gauge display.

      OK

      The microphone input levels of the gauge change in accordance with the voice.

      Result

      Result Proceed to
      Microphone input levels change for microphone 1 and 2 A
      Microphone input level does not change for microphone 1 B
      Microphone input level does not change for microphone 2 C

    Result: 

    A 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

    Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

    Result: 

    C 

    See step  12

    Result: 

    B 

    See step  3

  3. CHECK DCM (TELEMATICS TRANSCEIVER) (MICROPHONE POWER SOURCE AND BODY GROUND) 

    HINT: 

    Measure the connector of the DCM (telematics transceiver) while it is connected.

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      H11-7 (MCI-) - Body ground Always Below 1 Ω
      H11-23 (SGND) - Body ground Always Below 1 Ω
      GTY1120224Courtesy 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 IG ON 7.5 to 8.5 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  10

    Result: 

    OK 

    See step  4

  4. CHECK DCM (TELEMATICS TRANSCEIVER) (OUTPUT TO RADIO AND DISPLAY RECEIVER ASSEMBLY) 

    HINT: 

    Measure the connector of the DCM (telematics transceiver) while it is connected.

    1. Using an oscilloscope, measure the waveform according to the condition(s) in the table below.
      Item Condition
      Tester Connection H11-16 (MCO+) - H11-32 (MCO-)
      Tool setting 50 mV/DIV, 500 ms/DIV
      Vehicle condition
      1. Turn the ignition switch to ON
      2. Sound is input to the telephone microphone assembly when the user is closer than 125 mm from the microphone case LH sound holes.
      GTY1120504Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (DCM (Telematics transceiver))

      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.
      • In order to ensure that a consistent sound level is input to the microphone, use a digital voice recorder, etc., to play back sound in the same location with respect to the microphone.

      Result

      Result Proceed to
      A waveform synchronized with voice signals is output A
      A waveform synchronized with voice signals is not output B

    Result: 

    B 

    See step  6

    Result: 

    A 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) 
    1. Disconnect the H108 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
      H108-21 (MIN+) - H11-16 (MCO+) Always Below 1 Ω
      H108-22 (MIN-) - H11-32 (MCO-) Always Below 1 Ω
      H108-21 (MIN+) or H11-16 (MCO+) - Body ground Always 10 kΩ or higher
      H108-22 (MIN-) or H11-32 (MCO-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

    Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  6. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) 
    1. Disconnect the H108 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
      H108-21 (MIN+) - H11-16 (MCO+) Always Below 1 Ω
      H108-22 (MIN-) - H11-32 (MCO-) Always Below 1 Ω
      H108-21 (MIN+) or H11-16 (MCO+) - Body ground Always 10 kΩ or higher
      H108-22 (MIN-) or H11-32 (MCO-) - 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 (DCM (TELEMATICS TRANSCEIVER) - TELEPHONE MICROPHONE ASSEMBLY LH) 
    1. Disconnect the H11 DCM (Telematics transceiver) connector.
    2. Disconnect the R25 telephone microphone assembly LH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H11-5 (MCVD) - R25-1 (MAC1) Always Below 1 Ω
      H11-6 (MCI+) - R25-2 (MO1+) Always Below 1 Ω
      H11-7 (MCI-) - R25-4 (MO1-) Always Below 1 Ω
      H11-5 (MCVD) or R25-1 (MAC1) - Body ground Always 10 kΩ or higher
      H11-6 (MCI+) or R25-2 (MO1+) - Body ground Always 10 kΩ or higher
      H11-7 (MCI-) or R25-4 (MO1-) - 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 (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY LH) 
    1. Disconnect the H108 radio and display receiver assembly connector.
    2. Disconnect the R25 telephone microphone assembly LH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H108-25 (SNS) - R25-5 (SNS1) Always Below 1 Ω
      H108-25 (SNS) or R25-5 (SNS1) - 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 TELEPHONE MICROPHONE ASSEMBLY LH (OUTPUT TO DCM (TELEMATICS TRANSCEIVER)) 
    1. Using an oscilloscope, measure the waveform according to the condition(s) in the table below.
      Item Condition
      Tester Connection R25-2 (MO1+) - R25-4 (MO1-)
      Tool setting 50 mV/DIV, 500 ms/DIV
      Vehicle condition
      1. Turn the ignition switch to ON
      2. Sound is input to the telephone microphone assembly when the user is closer than 125 mm from the microphone case LH sound holes.
      GTY1121876Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Telephone microphone assembly LH)

      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.
      • In order to ensure that a consistent sound level is input to the microphone, use a digital voice recorder, etc., to play back sound in the same location with respect to the microphone.

      Result

      Result Proceed to
      A waveform synchronized with voice signals is output A
      A waveform synchronized with voice signals is not output B

    Result: 

    A 

    REPLACE DCM (TELEMATICS TRANSCEIVER) 

    Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

    Result: 

    B 

    REPLACE TELEPHONE MICROPHONE ASSEMBLY LH 

    Refer to REMOVAL [10/2022 - ]

  10. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - TELEPHONE MICROPHONE ASSEMBLY LH) 
    1. Disconnect the H11 DCM (Telematics transceiver) connector.
    2. Disconnect the R25 telephone microphone assembly LH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H11-5 (MCVD) - R25-1 (MAC1) Always Below 1 Ω
      H11-6 (MCI+) - R25-2 (MO1+) Always Below 1 Ω
      H11-7 (MCI-) - R25-4 (MO1-) Always Below 1 Ω
      H11-5 (MCVD) or R25-1 (MAC1) - Body ground Always 10 kΩ or higher
      H11-6 (MCI+) or R25-2 (MO1+) - Body ground Always 10 kΩ or higher
      H11-7 (MCI-) or R25-4 (MO1-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  11

  11. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) 
    1. Disconnect the H108 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
      H108-21 (MIN+) - H11-16 (MCO+) Always Below 1 Ω
      H108-22 (MIN-) - H11-32 (MCO-) Always Below 1 Ω
      H108-21 (MIN+) or H11-16 (MCO+) - Body ground Always 10 kΩ or higher
      H108-22 (MIN-) or H11-32 (MCO-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE DCM (TELEMATICS TRANSCEIVER) 

    Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  12. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY RH) 
    1. Disconnect the H109 radio and display receiver assembly connector.
    2. Disconnect the R26 telephone microphone assembly RH connector
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H109-17 (MI2+) - R26-2 (MO2+) Always Below 1 Ω
      H109-18 (MI2-) - R26-4 (MO2-) Always Below 1 Ω
      H109-20 (MAC2) - R26-1 (MAC2) Always Below 1 Ω
      H109-21 (SNS2) - R26-5 (SNS2) Always Below 1 Ω
      H109-17 (MI2+) or R26-2 (MO2+) - Body ground Always 10 kΩ or higher
      H109-18 (MI2-) or R26-4 (MO2-) - Body ground Always 10 kΩ or higher
      H109-20 (MAC2) or R26-1 (MAC2) - Body ground Always 10 kΩ or higher
      H109-21 (SNS2) or R26-5 (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  13

  13. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY (MAC2, MI2-) 
    1. With the H109 radio and display receiver assembly connector connected, disconnect the R26 telephone microphone assembly RH connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R26-4 (MO2-) - Body ground Always Below 1 Ω
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      R26-1 (MAC2) - Body ground IG ON 7.5 to 8.5 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

    Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

    Result: 

    OK 

    See step  14

  14. CHECK TELEPHONE MICROPHONE ASSEMBLY RH (OUTPUT TO RADIO AND DISPLAY RECEIVER ASSEMBLY) 
    1. Using an oscilloscope, measure the waveform according to the condition(s) in the table below.
      Item Condition
      Tester Connection R26-2 (MO2+) - R26-4 (MO2-)
      Tool setting 50 mV/DIV., 500 ms/DIV.
      Vehicle condition
      1. Turn the ignition switch to ON
      2. Sound is input to the telephone microphone assembly when the user is closer than 125 mm from the microphone case RH sound holes.
      GTY1120679Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Telephone microphone assembly RH)

      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.
      • In order to ensure that a consistent sound level is input to the microphone, use a digital voice recorder, etc., to play back sound in the same location with respect to the microphone.

      Result

      Result Proceed to
      A waveform synchronized with voice signals is output A
      A waveform synchronized with voice signals is not output B

    Result: 

    A 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

    Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

    Result: 

    B 

    REPLACE TELEPHONE MICROPHONE ASSEMBLY RH 

    Refer to REMOVAL [10/2022 - ]

  15. CHECK MICROPHONE 
    1. Enter diagnostic mode.
      GTY1069377Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Mic 1 Input Level
      *b Mic 2 Input Level

      Refer to DIAGNOSIS SYSTEM [10/2022 - ]

    2. Select "Function Check/Setting" from the "Service Menu" screen.
    3. Select "Microphone Check" from the "Function Check/Setting I" screen.
    4. Speak into each microphone assembly and check the microphone input level gauge display.

      OK

      The microphone input levels of the gauge change in accordance with the voice.

      Result

      Result Proceed to
      Microphone input levels change for microphone 1 and 2 A
      Microphone input level does not change for microphone 1 B
      Microphone input level does not change for microphone 2 C

    Result: 

    A 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

    Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

    Result: 

    C 

    See step  19

    Result: 

    B 

    See step  16

  16. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY LH) 
    1. Disconnect the H108 radio and display receiver assembly connector.
    2. Disconnect the R25 telephone microphone assembly LH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H108-21 (MIN+) - R25-2 (MO1+) Always Below 1 Ω
      H108-22 (MIN-) - R25-4 (MO1-) Always Below 1 Ω
      H108-23 (MACC) - R25-1 (MAC1) Always Below 1 Ω
      H108-25 (SNS) - R25-5 (SNS1) Always Below 1 Ω
      H108-21 (MIN+) or R25-2 (MO1+) - Body ground Always 10 kΩ or higher
      H108-22 (MIN-) or R25-4 (MO1-) - Body ground Always 10 kΩ or higher
      H108-23 (MACC) or R25-1 (MAC1) - Body ground Always 10 kΩ or higher
      H108-25 (SNS) or R25-5 (SNS1) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  17

  17. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY (MACC, MIN-) 
    1. With the H108 radio and display receiver assembly connector connected, disconnect the R25 telephone microphone assembly LH connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R25-4 (MO1-) - Body ground Always Below 1 Ω
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      R25-1 (MAC1) - Body ground IG ON 7.5 to 8.5 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

    Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

    Result: 

    OK 

    See step  18

  18. INSPECT TELEPHONE MICROPHONE ASSEMBLY LH (OUTPUT TO RADIO AND DISPLAY RECEIVER ASSEMBLY) 
    1. Using an oscilloscope, measure the waveform according to the condition(s) in the table below.
      Item Condition
      Tester Connection R25-2 (MO1+) - R25-4 (MO1-)
      Tool setting 50 mV/DIV., 500 ms/DIV.
      Vehicle condition
      1. Turn the ignition switch to ON
      2. Sound is input to the telephone microphone assembly when the user is closer than 125 mm from the microphone case LH sound holes.
      GTY1121028Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Telephone microphone assembly LH)

      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.
      • In order to ensure that a consistent sound level is input to the microphone, use a digital voice recorder, etc., to play back sound in the same location with respect to the microphone.

      Result

      Result Proceed to
      A waveform synchronized with voice signals is output A
      A waveform synchronized with voice signals is not output B

    Result: 

    A 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

    Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

    Result: 

    B 

    REPLACE TELEPHONE MICROPHONE ASSEMBLY LH 

    Refer to REMOVAL [10/2022 - ]

  19. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY RH) 
    1. Disconnect the H109 radio and display receiver assembly connector.
    2. Disconnect the R26 telephone microphone assembly RH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H109-17 (MI2+) - R26-2 (MO2+) Always Below 1 Ω
      H109-18 (MI2-) - R26-4 (MO2-) Always Below 1 Ω
      H109-20 (MAC2) - R26-1 (MAC2) Always Below 1 Ω
      H109-21 (SNS2) - R26-5 (SNS2) Always Below 1 Ω
      H109-17 (MI2+) or R26-2 (MO2+) - Body ground Always 10 kΩ or higher
      H109-18 (MI2-) or R26-4 (MO2-) - Body ground Always 10 kΩ or higher
      H109-20 (MAC2) or R26-1 (MAC2) - Body ground Always 10 kΩ or higher
      H109-21 (SNS2) or R26-5 (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  20

  20. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY (MO2, MI2-) 
    1. With the H109 radio and display receiver assembly connector connected, disconnect the R26 telephone microphone assembly RH connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R26-4 (MO2-) - Body ground Always Below 1 Ω
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      R26-1 (MAC2) - Body ground IG ON 7.5 to 8.5 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

    Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

    Result: 

    OK 

    See step  21

  21. INSPECT TELEPHONE MICROPHONE ASSEMBLY RH (OUTPUT TO RADIO AND DISPLAY RECEIVER ASSEMBLY) 
    1. Using an oscilloscope, measure the waveform according to the condition(s) in the table below.
      Item Condition
      Tester Connection R26-2 (MO2+) - R26-4 (MO2-)
      Tool setting 50 mV/DIV., 500 ms/DIV.
      Vehicle condition
      1. Turn the ignition switch to ON
      2. Sound is input to the telephone microphone assembly when the user is closer than 125 mm from the microphone case RH sound holes.
      GTY1121024Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Telephone microphone assembly RH)

      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.
      • In order to ensure that a consistent sound level is input to the microphone, use a digital voice recorder, etc., to play back sound in the same location with respect to the microphone.

      Result

      Result Proceed to
      A waveform synchronized with voice signals is output A
      A waveform synchronized with voice signals is not output B

    Result: 

    A 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

    Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

    Result: 

    B 

    REPLACE TELEPHONE MICROPHONE ASSEMBLY RH 

    Refer to REMOVAL [10/2022 - ]

Diesel-Data.com