LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2023 >> Prius XLE >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Audio / Video System - Diagnostic Codes (2 Of 2), Circuit Tests & Symptom Tests >> Audio And Visual System >> Microphone Circuit [12/2022 - ] >> Procedure

Microphone Circuit [12/2022 - ]: Procedure

  1. CHECK MODEL 

    Result

    Result Proceed to
    w/ Telematics Transceiver A
    w/o 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 [12/2022 - ]

    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 [12/2022 - ] 

    Result: 

    C 

    See step  6

    Result: 

    B 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY RH) 
    1. Disconnect the K101 radio and display receiver assembly connector.
    2. Disconnect the U16 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
      K101-17 (MI2+) - U16-2 (MO2+) Always Below 1 Ω
      K101-18 (MI2-) - U16-4 (MO2-) Always Below 1 Ω
      K101-20 (MAC2) - U16-1 (MAC2) Always Below 1 Ω
      K101-21 (SNS2) - U16-5 (SNS2) Always Below 1 Ω
      K101-17 (MI2+) or U16-2 (MO2+) - Body ground Always 10 kΩ or higher
      K101-18 (MI2-) or U16-4 (MO2-) - Body ground Always 10 kΩ or higher
      K101-20 (MAC2) or U16-1 (MAC2) - Body ground Always 10 kΩ or higher
      K101-21 (SNS2) or U16-5 (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  4

  4. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY (MAC2, MI2-) 
    1. With the K101 radio and display receiver assembly connector connected, disconnect the U16 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
      U16-4 (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
      U16-1 (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 [12/2022 - ] 

    Result: 

    OK 

    See step  5

  5. 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 U16-2 (MO2+) - U16-4 (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 LH sound holes.
      GTY1150311Courtesy 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 [12/2022 - ] 

    Result: 

    B 

    REPLACE TELEPHONE MICROPHONE ASSEMBLY RH. Refer to  REMOVAL [12/2022 - 03/2023]  , or refer to  REMOVAL [03/2023 - ] 

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

    HINT: 

    Measure the connector of the 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
      K9-7 (MCI-) - Body ground Always Below 1 Ω
      K9-23 (SGND) - Body ground Always Below 1 Ω
      GTY1151682Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Telematics transceiver)
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      K9-5 (MCVD) - Body ground IG ON 7.5 to 8.5 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  13

    Result: 

    OK 

    See step  7

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

    HINT: 

    Measure the connector of the 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 K9-16 (MCO+) - K9-32 (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 RH sound holes.
      GTY1148215Courtesy 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  9

    Result: 

    A 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEMATICS TRANSCEIVER) 
    1. Disconnect the K81 radio and display receiver assembly connector.
    2. Disconnect the K9 Telematics transceiver connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K81-21 (MIN+) - K9-16 (MCO+) Always Below 1 Ω
      K81-22 (MIN-) - K9-32 (MCO-) Always Below 1 Ω
      K81-21 (MIN+) or K9-16 (MCO+) - Body ground Always 10 kΩ or higher
      K81-22 (MIN-) or K9-32 (MCO-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

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

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  9. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEMATICS TRANSCEIVER) 
    1. Disconnect the K81 radio and display receiver assembly connector.
    2. Disconnect the K9 Telematics transceiver connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K81-21 (MIN+) - K9-16 (MCO+) Always Below 1 Ω
      K81-22 (MIN-) - K9-32 (MCO-) Always Below 1 Ω
      K81-21 (MIN+) or K9-16 (MCO+) - Body ground Always 10 kΩ or higher
      K81-22 (MIN-) or K9-32 (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  10

  10. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - TELEPHONE MICROPHONE ASSEMBLY LH) 
    1. Disconnect the K9 Telematics transceiver connector.
    2. Disconnect the U15 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
      K9-5 (MCVD) - U15-1 (MAC1) Always Below 1 Ω
      K9-6 (MCI+) - U15-2 (MO1+) Always Below 1 Ω
      K9-7 (MCI-) - U15-4 (MO1-) Always Below 1 Ω
      K9-5 (MCVD) or U15-1 (MAC1) - Body ground Always 10 kΩ or higher
      K9-6 (MCI+) or U15-2 (MO1+) - Body ground Always 10 kΩ or higher
      K9-7 (MCI-) or U15-4 (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 - TELEPHONE MICROPHONE ASSEMBLY LH) 
    1. Disconnect the K81 radio and display receiver assembly connector.
    2. Disconnect the U15 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
      K81-25 (SNS) - U15-5 (SNS1) Always Below 1 Ω
      K81-25 (SNS) or U15-5 (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  12

  12. CHECK TELEPHONE MICROPHONE ASSEMBLY LH (OUTPUT TO TELEMATICS TRANSCEIVER) 
    1. Using an oscilloscope, measure the waveform according to the condition(s) in the table below.
      Item Condition
      Tester Connection U15-2 (MO1+) - U15-4 (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 RH sound holes.
      GTY1144349Courtesy 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 [12/2022 - ] 

    Result: 

    B 

    REPLACE TELEPHONE MICROPHONE ASSEMBLY LH. Refer to  REMOVAL [12/2022 - 03/2023]  , or refer to  REMOVAL [03/2023 - ] 

  13. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - TELEPHONE MICROPHONE ASSEMBLY LH) 
    1. Disconnect the K9 Telematics transceiver connector.
    2. Disconnect the U15 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
      K9-5 (MCVD) - U15-1 (MAC1) Always Below 1 Ω
      K9-6 (MCI+) - U15-2 (MO1+) Always Below 1 Ω
      K9-7 (MCI-) - U15-4 (MO1-) Always Below 1 Ω
      K9-5 (MCVD) or U15-1 (MAC1) - Body ground Always 10 kΩ or higher
      K9-6 (MCI+) or U15-2 (MO1+) - Body ground Always 10 kΩ or higher
      K9-7 (MCI-) or U15-4 (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  14

  14. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEMATICS TRANSCEIVER) 
    1. Disconnect the K81 radio and display receiver assembly connector.
    2. Disconnect the K9 telematics transceiver connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K81-21 (MIN+) - K9-16 (MCO+) Always Below 1 Ω
      K81-22 (MIN-) - K9-32 (MCO-) Always Below 1 Ω
      K81-21 (MIN+) or K9-16 (MCO+) - Body ground Always 10 kΩ or higher
      K81-22 (MIN-) or K9-32 (MCO-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

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

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  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 [12/2022 - ]

    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 [12/2022 - ] 

    Result: 

    C 

    See step  19

    Result: 

    B 

    See step  16

  16. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY RH) 
    1. Disconnect the K101 radio and display receiver assembly connector.
    2. Disconnect the U16 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
      K101-17 (MI2+) - U16-2 (MO2+) Always Below 1 Ω
      K101-18 (MI2-) - U16-4 (MO2-) Always Below 1 Ω
      K101-20 (MAC2) - U16-1 (MAC2) Always Below 1 Ω
      K101-21 (SNS2) - U16-5 (SNS2) Always Below 1 Ω
      K101-17 (MI2+) or U16-2 (MO2+) - Body ground Always 10 kΩ or higher
      K101-18 (MI2-) or U16-4 (MO2-) - Body ground Always 10 kΩ or higher
      K101-20 (MAC2) or U16-1 (MAC2) - Body ground Always 10 kΩ or higher
      K101-21 (SNS2) or U16-5 (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  17

  17. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY (MO2, MI2-) 
    1. With the K101 radio and display receiver assembly connector connected, disconnect the U16 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
      U16-4 (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
      U16-1 (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 [12/2022 - ] 

    Result: 

    OK 

    See step  18

  18. 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 U16-2 (MO2+) - U16-4 (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 LH sound holes.
      GTY1141201Courtesy 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 [12/2022 - ] 

    Result: 

    B 

    REPLACE TELEPHONE MICROPHONE ASSEMBLY RH. Refer to  REMOVAL [12/2022 - 03/2023]  , or refer to  REMOVAL [03/2023 - ] 

  19. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY LH) 
    1. Disconnect the K81 radio and display receiver assembly connector.
    2. Disconnect the U15 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
      K81-21 (MIN+) - U15-2 (MO1+) Always Below 1 Ω
      K81-22 (MIN-) - U15-4 (MO1-) Always Below 1 Ω
      K81-23 (MACC) - U15-1 (MAC1) Always Below 1 Ω
      K81-25 (SNS) - U15-5 (SNS1) Always Below 1 Ω
      K81-21 (MIN+) or U15-2 (MO1+) - Body ground Always 10 kΩ or higher
      K81-22 (MIN-) or U15-4 (MO1-) - Body ground Always 10 kΩ or higher
      K81-23 (MACC) or U15-1 (MAC1) - Body ground Always 10 kΩ or higher
      K81-25 (SNS) or U15-5 (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  20

  20. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY (MACC, MIN-) 
    1. With the K81 radio and display receiver assembly connector connected, disconnect the U15 telephone microphone assembly LH connecter.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      U15-4 (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
      U15-1 (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 [12/2022 - ] 

    Result: 

    OK 

    See step  21

  21. 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 U15-2 (MO1+) - U15-4 (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 RH sound holes.
      GTY1147486Courtesy 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 [12/2022 - ] 

    Result: 

    B 

    REPLACE TELEPHONE MICROPHONE ASSEMBLY RH. Refer to  REMOVAL [12/2022 - 03/2023]  , or refer to  REMOVAL [03/2023 - ] 

scientia non olet · About LEMON Manuals