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Microphone Circuit between Microphone and Navigation Receiver Assembly [12/2015 - 11/2017]: Procedure

  1. CHECK MICROPHONE (OPERATION CHECK) 
    1. Enter the "Microphone Check" screen.

      Refer to Check Microphone in Operation Check (Refer to OPERATION CHECK [12/2015 - 11/2017] ).

      GTY434237Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. When a voice is input into the microphone, check that the microphone input level meter changes according to the input voice.
    3. Push the recording switch and perform voice recording.

      HINT: 

      • Select the recording switch with the blower motor of the air conditioning system stopped. If an outlet of the air conditioning system is facing the microphone, noise may be recorded.
      • Voice can be recorded for up to 5 seconds.
    4. Check that the recording indicator remains on while recording and that the recorded voice is played normally without noise or distortion.

      OK

      All check results are normal.

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    (Refer to PROBLEM SYMPTOMS TABLE [12/2015 - 08/2016] Refer to PROBLEM SYMPTOMS TABLE [08/2016 - 11/2017] )

    Result: 

    NG 

    See step  2

  2. CONFIRM MODEL 
    1. Choose the model to be inspected.
      RESULT

      Result Proceed to
      w/o Safety Connect System A
      w/ Safety Connect System B

    Result: 

    B 

    See step  5

    Result: 

    A 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - AMPLIFIER MICROPHONE ASSEMBLY) 
    1. Disconnect the D153 navigation receiver assembly connector.
    2. Disconnect the T29 amplifier microphone assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D153-4 (MACC) - T29-1 (MACC) Always Below 1 Ω
      D153-5 (MIN+) - T29-2 (MIC+) Always Below 1 Ω
      D153-19 (MIN-) - T29-3 (MIC-) Always Below 1 Ω
      D153-6 (SNS2) - T29-4 (SNS2) Always Below 1 Ω
      D153-4 (MACC) - Body ground Always 10 kΩ or higher
      D153-5 (MIN+) - Body ground Always 10 kΩ or higher
      D153-19 (MIN-) - Body ground Always 10 kΩ or higher
      D153-18 (SGND) - Body ground Always 10 kΩ or higher
      D153-6 (SNS2) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. INSPECT NAVIGATION RECEIVER ASSEMBLY 
    1. Measure the voltage according to the value(s) in the table below.
      GTY733031Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      D153-4 (MACC) - Body ground Ignition switch ACC 4 to 6 V
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D153-18 (SGND) - Body ground Always Below 1 Ω
      D153-19 (MIN-) - Body ground Always Below 1 Ω
      RESULT

      Result Proceed to
      NG A
      OK B
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Navigation Receiver Assembly)

    Result: 

    A 

    REPLACE NAVIGATION RECEIVER ASSEMBLY 

    (Refer to REMOVAL [12/2015 - 11/2017] )

    Result: 

    B 

    See step  10

  5. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - AMPLIFIER MICROPHONE ASSEMBLY) 
    1. Disconnect the D153 navigation receiver assembly connector.
    2. Disconnect the T29 amplifier microphone assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D153-6 (SNS2) - T29-4 (SNS2) Always Below 1 Ω
      D153-6 (SNS2) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) 
    1. Disconnect the D153 navigation receiver assembly connector.
    2. Disconnect the D73 DCM (telematics transceiver) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D153-5 (MIN+) - D73-18 (MCO+) Always Below 1 Ω
      D153-19 (MIN-) - D73-19 (MCO-) Always Below 1 Ω
      D153-5 (MIN+) - Body ground Always 10 kΩ or higher
      D153-19 (MIN-) - Body ground Always 10 kΩ or higher
      D153-18 (SGND) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - AMPLIFIER MICROPHONE ASSEMBLY) 
    1. Disconnect the D73 DCM (telematics transceiver) connector.
    2. Disconnect the T29 amplifier microphone assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D73-33 (MCVD) - T29-1 (MACC) Always Below 1 Ω
      D73-34 (MCI+) - T29-2 (MIC+) Always Below 1 Ω
      D73-35 (MCI-) - T29-3 (MIC-) Always Below 1 Ω
      D73-33 (MCVD) - Body ground Always 10 kΩ or higher
      D73-34 (MCI+) - Body ground Always 10 kΩ or higher
      D73-35 (MCI-) - Body ground Always 10 kΩ or higher
      D73-32 (SGND) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. INSPECT NAVIGATION RECEIVER ASSEMBLY 
    1. Disconnect the D73 DCM (telematics transceiver) connector.
      GTY732489Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D153-18 (SGND) - Body ground Always Below 1 Ω
      D153-19 (MIN-) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Navigation Receiver Assembly)

    Result: 

    NG 

    REPLACE NAVIGATION RECEIVER ASSEMBLY 

    (Refer to REMOVAL [12/2015 - 11/2017] )

    Result: 

    OK 

    See step  9

  9. INSPECT DCM (TELEMATICS TRANSCEIVER) 
    1. Measure the voltage according to the value(s) in the table below.
      GTY697772Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      D73-33 (MCVD) - Body ground Ignition switch ACC 4 to 6 V
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D73-35 (MCI-) - Body ground Always Below 1 Ω
      D73-32 (SGND) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (DCM (Telematics Transceiver))

    Result: 

    NG 

    REPLACE DCM (TELEMATICS TRANSCEIVER) 

    (Refer to REMOVAL [12/2015 - 11/2017] )

    Result: 

    OK 

    See step  10

  10. INSPECT AMPLIFIER MICROPHONE ASSEMBLY 
    1. Remove the amplifier microphone assembly (Refer to REMOVAL [12/2015 - 08/2018] ).
    2. Measure the resistance according to the value(s) in the table below.
      GTY686310Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      4 (SNS2) - 3 (MIC-) Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Amplifier Microphone Assembly)

    Result: 

    NG 

    REPLACE AMPLIFIER MICROPHONE ASSEMBLY 

    (Refer to REMOVAL [12/2015 - 08/2018] )

    Result: 

    OK 

    See step  11

  11. INSPECT AMPLIFIER MICROPHONE ASSEMBLY 
    1. Turn the ignition switch to ACC.
    2. Connect an oscilloscope to terminals 2 (MIC+) and 3 (MIC-) of the T29 amplifier microphone assembly connector.
      GTY707735Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check the waveform of the amplifier microphone assembly using the oscilloscope.
      RESULT

      Result Proceed to
      A waveform synchronized with the voice input to the amplifier microphone assembly is output A
      A waveform synchronized with the voice input to the amplifier microphone assembly is not output B
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Amplifier Microphone Assembly)

    Result: 

    A 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    (Refer to PROBLEM SYMPTOMS TABLE [12/2015 - 08/2016] Refer to PROBLEM SYMPTOMS TABLE [08/2016 - 11/2017] )

    Result: 

    B 

    REPLACE AMPLIFIER MICROPHONE ASSEMBLY 

    (Refer to REMOVAL [12/2015 - 08/2018] )

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