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Microphone Circuit between Microphone and Navigation Receiver Assembly [10/2014 - 10/2015]: Procedure

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

      Refer to Check Microphone in Operation Check (Refer to OPERATION CHECK [10/2014 - ] ).

      GTY451926Courtesy 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.

      OK

      Check result is normal.

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    (Refer to PROBLEM SYMPTOMS TABLE [10/2014 - 10/2015] )

    Result: 

    NG 

    See step  2

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

      Result

      Model Proceed to
      w/o Manual (SOS) switch A
      w/ Manual (SOS) switch B

    Result: 

    B 

    See step  5

    Result: 

    A 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY)) 
    1. Disconnect the I8 navigation ECU sub-assembly connector.
    2. Disconnect the S12 inner rear view mirror assembly (amplifier microphone assembly) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I8-4 (MACC) - S12-9 (ACC) Always Below 1 Ω
      I8-5 (MIN+) - S12-11 (MIC+) Always Below 1 Ω
      I8-19 (MIN-) - S12-12 (MIC-) Always Below 1 Ω
      I8-6 (SNS2) - S12-10 (SGND) Always Below 1 Ω
      I8-4 (MACC) - Body ground Always 10 kΩ or higher
      I8-5 (MIN+) - Body ground Always 10 kΩ or higher
      I8-19 (MIN-) - Body ground Always 10 kΩ or higher
      I8-18 (SGND) - Body ground Always 10 kΩ or higher
      I8-6 (SNS2) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. INSPECT NAVIGATION ECU SUB-ASSEMBLY 
    1. Measure the voltage according to the value(s) in the table below.
      GTY558190Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Condition Specified Condition
      I8-4 (MACC) - Body ground Power switch on (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
      I8-18 (SGND) - Body ground Always Below 1 Ω
      I8-19 (MIN-) - Body ground Always Below 1 Ω
    3. Proceed to the next step based on the inspection result.

      Result

      Result Proceed to
      NG A
      OK B
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Navigation ECU Sub-assembly)

    Result: 

    A 

    REPLACE NAVIGATION ECU SUB-ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    B 

    See step  10

  5. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU SUB-ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY)) 
    1. Disconnect the I8 navigation ECU sub-assembly connector.
    2. Disconnect the S12 inner rear view mirror assembly (amplifier microphone assembly) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I8-6 (SNS2) - S12-10 (SGND) Always Below 1 Ω
      I8-6 (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 ECU SUB-ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) 
    1. Disconnect the I8 navigation ECU sub-assembly connector.
    2. Disconnect the I135 DCM (telematics transceiver) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I8-5 (MIN+) - I135-18 (MCO+) Always Below 1 Ω
      I8-19 (MIN-) - I135-19 (MCO-) Always Below 1 Ω
      I8-5 (MIN+) - Body ground Always 10 kΩ or higher
      I8-19 (MIN-) - Body ground Always 10 kΩ or higher
      I8-18 (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) - INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY)) 
    1. Disconnect the I135 DCM (telematics transceiver) connector.
    2. Disconnect the S12 inner rear view mirror assembly (amplifier microphone assembly) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I135-33 (MCVD) - S12-9 (ACC) Always Below 1 Ω
      I135-34 (MCI+) - S12-11 (MIC+) Always Below 1 Ω
      I135-35 (MCI-) - S12-12 (MIC-) Always Below 1 Ω
      I135-33 (MCVD) - Body ground Always 10 kΩ or higher
      I135-34 (MCI+) - Body ground Always 10 kΩ or higher
      I135-35 (MCI-) - Body ground Always 10 kΩ or higher
      I135-32 (SGND) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. INSPECT NAVIGATION ECU SUB-ASSEMBLY 
    1. Disconnect the I135 DCM (telematics transceiver) connector.
      GTY606602Courtesy 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
      I8-18 (SGND) - Body ground Always Below 1 Ω
      I8-19 (MIN-) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Navigation ECU Sub-assembly)

    Result: 

    NG 

    REPLACE NAVIGATION ECU SUB-ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    OK 

    See step  9

  9. INSPECT DCM (TELEMATICS TRANSCEIVER) 
    1. Measure the voltage according to the value(s) in the table below.
      GTY565629Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Condition Specified Condition
      I135-33 (MCVD) - Body ground Power switch on (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
      I135-35 (MCI-) - Body ground Always Below 1 Ω
      I135-32 (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 [10/2014 - ] )

    Result: 

    OK 

    See step  10

  10. INSPECT INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) 
    1. Remove the inner rear view mirror assembly (amplifier microphone assembly) (Refer to REMOVAL [10/2014 - 10/2015] ).
    2. Measure the resistance according to the value(s) in the table below.
      GTY376243Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      10 (SGND) - 12 (MIC-) Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Inner Rear View Mirror Assembly (Amplifier Microphone Assembly))

    Result: 

    NG 

    REPLACE INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) 

    (Refer to REMOVAL [10/2014 - 10/2015] )

    Result: 

    OK 

    See step  11

  11. INSPECT INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) 
    1. Turn the power switch on (ACC).
    2. Connect an oscilloscope to terminals 11 (MIC+) and 12 (MIC-) of the S12 inner rear view mirror assembly (amplifier microphone assembly) connector.
      GTY589009Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check the waveform of the inner rear view mirror assembly (amplifier microphone assembly) using the oscilloscope.

      Result

      Result Proceed to
      A waveform synchronized with the voice input to the inner rear view mirror assembly (amplifier microphone assembly) is output. A
      A waveform synchronized with the voice input to the inner rear view mirror assembly (amplifier microphone assembly) is not output. B
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Inner Rear View Mirror Assembly (Amplifier Microphone Assembly))

    Result: 

    A 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    (Refer to PROBLEM SYMPTOMS TABLE [10/2014 - 10/2015] )

    Result: 

    B 

    REPLACE INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) 

    (Refer to REMOVAL [10/2014 - 10/2015] )

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