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Microphone Circuit between Microphone and Navigation Receiver Assembly [08/2014 - ]: Procedure

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

      Refer to Check Microphone in Operation Check (See article. Refer to OPERATION CHECK [08/2014 - ] ).

      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

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    (See article. Refer to PROBLEM SYMPTOMS TABLE [08/2014 - ] )

    Result:  NG

    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

    B 

    See step  5

    Result:  A

    A 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) 
    1. Disconnect the H140 radio receiver assembly connector.
    2. Disconnect the T6 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
      H140-29 (MACC) - T6-14 (MACC) Always Below 1 Ω
      H140-27 (MIN+) - T6-13 (MCO+) Always Below 1 Ω
      H140-48 (MIN-) - T6-12 (MCO-) Always Below 1 Ω
      H140-49 (SNS2) - T6-11 (SNS2) Always Below 1 Ω
      H140-29 (MACC) - Body ground Always 10 kΩ or higher
      H140-27 (MIN+) - Body ground Always 10 kΩ or higher
      H140-48 (MIN-) - Body ground Always 10 kΩ or higher
      H140-28 (SGND) - Body ground Always 10 kΩ or higher
      H140-49 (SNS2) - Body ground Always 10 kΩ or higher

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  OK

    OK 

    See step  4

  4. INSPECT RADIO RECEIVER ASSEMBLY 
    1. Measure the voltage according to the value(s) in the table below.
      GTY526523Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Condition Specified Condition
      H140-29 (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
      H140-28 (SGND) - Body ground Always Below 1 Ω
      H140-48 (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
      (Radio Receiver Assembly)

    Result:  A

    A 

    REPLACE RADIO RECEIVER ASSEMBLY 

    (See article. Refer to REMOVAL [08/2014 - ] )

    Result:  B

    B 

    See step  10

  5. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) 
    1. Disconnect the H140 radio receiver assembly connector.
    2. Disconnect the T6 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
      H140-49 (SNS2) - T6-11 (SNS2) Always Below 1 Ω
      H140-49 (SNS2) - Body ground Always 10 kΩ or higher

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  OK

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) 
    1. Disconnect the H140 radio receiver assembly connector.
    2. Disconnect the H67 DCM (telematics transceiver) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H140-27 (MIN+) - H67-18 (MCO+) Always Below 1 Ω
      H140-48 (MIN-) - H67-19 (MCO-) Always Below 1 Ω
      H140-27 (MIN+) - Body ground Always 10 kΩ or higher
      H140-48 (MIN-) - Body ground Always 10 kΩ or higher
      H140-28 (SGND) - Body ground Always 10 kΩ or higher

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  OK

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) 
    1. Disconnect the H67 DCM (telematics transceiver) connector.
    2. Disconnect the T6 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
      H67-33 (MCVD) - T6-14 (MACC) Always Below 1 Ω
      H67-34 (MCI+) - T6-13 (MCO+) Always Below 1 Ω
      H67-35 (MCI-) - T6-12 (MCO-) Always Below 1 Ω
      H67-33 (MCVD) - Body ground Always 10 kΩ or higher
      H67-34 (MCI+) - Body ground Always 10 kΩ or higher
      H67-35 (MCI-) - Body ground Always 10 kΩ or higher
      H67-32 (SGND) - Body ground Always 10 kΩ or higher

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  OK

    OK 

    See step  8

  8. INSPECT RADIO RECEIVER ASSEMBLY 
    1. Disconnect the H67 DCM (telematics transceiver) connector.
      GTY532945Courtesy 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
      H140-28 (SGND) - Body ground Always Below 1 Ω
      H140-48 (MIN-) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Radio Receiver Assembly)

    Result:  NG

    NG 

    REPLACE RADIO RECEIVER ASSEMBLY 

    (See article. Refer to REMOVAL [08/2014 - ] )

    Result:  OK

    OK 

    See step  9

  9. INSPECT DCM (TELEMATICS TRANSCEIVER) 
    1. Measure the voltage according to the value(s) in the table below.
      GTY531607Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Condition Specified Condition
      H67-33 (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
      H67-35 (MCI-) - Body ground Always Below 1 Ω
      H67-32 (SGND) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

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

    Result:  NG

    NG 

    REPLACE DCM (TELEMATICS TRANSCEIVER) 

    (See article. Refer to REMOVAL [08/2014 - ] )

    Result:  OK

    OK 

    See step  10

  10. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) 
    1. Remove the map light assembly (telephone microphone assembly) (See article. Refer to REMOVAL [08/2014 - ] ).
    2. Measure the resistance according to the value(s) in the table below.
      GTY526469Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      11 (SNS2) - 12 (MCO-) Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Map Light Assembly (Telephone Microphone Assembly))

    Result:  NG

    NG 

    REPLACE MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) 

    (See article. Refer to REMOVAL [08/2014 - ] )

    Result:  OK

    OK 

    See step  11

  11. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) 
    1. Turn the power switch on (ACC).
    2. Connect an oscilloscope to terminals 13 (MCO+) and 12 (MCO-) of the T6 map light assembly (telephone microphone assembly) connector.
      GTY533123Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. 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
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Map Light Assembly (Telephone Microphone Assembly))

    Result:  A

    A 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    (See article. Refer to PROBLEM SYMPTOMS TABLE [08/2014 - ] )

    Result:  B

    B 

    See step  12

  12. REPLACE TELEPHONE MICROPHONE ASSEMBLY 
    1. Replace the telephone microphone assembly with a new or known good one (See article. Refer to REMOVAL [08/2014 - ] ).
    2. Check if the same malfunction recurs.

      Result

      Result Proceed to
      Malfunction does not recur
      (returns to normal)      		 A
      Malfunction recurs B

    Result:  A

    A 

    END 

    Result:  B

    B 

    REPLACE MAP LIGHT ASSEMBLY 

    (See article. Refer to REMOVAL [08/2014 - ] )

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