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Microphone Circuit between Microphone and Radio Receiver [11/2016 - ]: Procedure

  1. CHECK MICROPHONE (OPERATION CHECK) 
    1. Enter the "Microphone Check" screen. Refer to Check Microphone in Operation Check.
      GTY451926Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Refer to OPERATION CHECK [11/2016 - ]

    2. When a 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:  3

    OK 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

    Result:  1

    NG 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) 
    1. Disconnect the F71 radio and display receiver assembly connector.
    2. Disconnect the S1 map light assembly (telephone microphone assembly) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F71-6 (SNS2) - S1-13 (SNS2) Always Below 1 Ω
      F71-4 (MACC) - S1-3 (MACC) Always Below 1 Ω
      F71-5 (MIN+) - S1-2 (MCO+) Always Below 1 Ω
      F71-19 (MIN-) - S1-4 (MCO-) Always Below 1 Ω
      F71-6 (SNS2) or S1-13 (SNS2) - Body ground Always 10 kΩ or higher
      F71-4 (MACC) or S1-3 (MACC) - Body ground Always 10 kΩ or higher
      F71-5 (MIN+) or S1-2 (MCO+) - Body ground Always 10 kΩ or higher
      F71-19 (MIN-) or S1-4 (MCO-) - Body ground Always 10 kΩ or higher
      F71-18 (SGND) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    OK 

    See step  3

  3. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY 
    1. Reconnect the F71 radio and display receiver assembly connector.
    2. Reconnect the S1 map light assembly (telephone microphone assembly) connector.
    3. Measure the voltage according to the value(s) in the table below.
      GTY452576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Radio and Display Receiver Assembly)

      Standard Voltage

      Tester Connection Condition Specified Condition
      F71-4 (MACC) - Body ground Ignition switch ACC 4 to 6 V
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F71-18 (SGND) - Body ground Always Below 1 Ω
      F71-19 (MIN-) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

    Result:  1

    OK 

    See step  4

  4. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) 
    1. Remove the map light assembly (telephone microphone assembly).

      Refer to REMOVAL [12/2013 - ]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      13 (SNS2) - 4 (MCO-) Always Below 1 Ω
      GTY449954Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Map Light Assembly (Telephone Microphone Assembly))

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY). Refer to  REMOVAL [12/2013 - ] 

    Result:  1

    OK 

    See step  5

  5. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) 
    1. Reconnect the F71 radio and display receiver assembly connector.
    2. Reconnect the S1 map light assembly (telephone microphone assembly) connector.
    3. Turn the ignition switch to ACC.
    4. Connect an oscilloscope to terminals 2 (MCO+) and 4 (MCO-) of the S1 map light assembly (telephone microphone assembly) connector.
      GTY455426Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Map Light Assembly (Telephone Microphone Assembly))
    5. Check the waveform of the map light assembly (telephone microphone assembly) using the oscilloscope.

      Result

      Result Proceed to
      A waveform synchronized with the voice input to the map light assembly (telephone microphone assembly) is output. A
      A waveform synchronized with the voice input to the map light assembly (telephone microphone assembly) is not output. B

    Result:  1

    A 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [11/2016 - ] 

    Result:  2

    B 

    REPLACE MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY). Refer to  REMOVAL [12/2013 - ] 

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