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Microphone Circuit between Microphone and Navigation Receiver Assembly [09/2014 - 11/2017]: Procedure

  1. CHECK MICROPHONE (OPERATION CHECK) 
    1. Enter the "Microphone Check" screen. Refer to Check Microphone in Operation Check.
      GTY434237Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Refer to OPERATION CHECK [09/2014 - 11/2017]

    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

      Proceed to
      OK
      NG

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [09/2014 - 11/2017] 

    Result: 

    NG 

    See step  2

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

      Result

      Result 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 (RADIO RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) 
    1. Disconnect the O57 radio receiver assembly connector.
    2. Disconnect the W4 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
      O57-49 (SNS2) - W4-1 (SNS2) Always Below 1 Ω
      O57-29 (MACC) - W4-4 (MACC) Always Below 1 Ω
      O57-27 (MIN+) - W4-3 (MCO+) Always Below 1 Ω
      O57-48 (MIN-) - W4-2 (MCO-) Always Below 1 Ω
      O57-49 (SNS2) - Body ground Always 10 kΩ or higher
      O57-29 (MACC) - Body ground Always 10 kΩ or higher
      O57-27 (MIN+) - Body ground Always 10 kΩ or higher
      O57-48 (MIN-) - Body ground Always 10 kΩ or higher
      O57-28 (SGND) - 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. INSPECT RADIO RECEIVER ASSEMBLY 
    1. Reconnect the O57 radio receiver assembly connector.
    2. Reconnect the W4 map light assembly (telephone microphone assembly) connector.
    3. Measure the voltage according to the value(s) in the table below.
      GTY505458Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Radio Receiver Assembly)

      Standard Voltage

      Tester Connection Condition Specified Condition
      O57-29 (MACC) - Body ground Engine switch on (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
      O57-28 (SGND) - Body ground Always Below 1 Ω
      O57-48 (MIN-) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    See step  10

    Result: 

    NG 

    REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [09/2014 - 11/2017] 

  5. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) 
    1. Disconnect the O57 radio receiver assembly connector.
    2. Disconnect the W4 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
      O57-49 (SNS2) - W4-1 (SNS2) Always Below 1 Ω
      O57-49 (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  6

  6. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) 
    1. Disconnect the O57 radio receiver assembly connector.
    2. Disconnect the O65 DCM (telematics transceiver) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O57-27 (MIN+) - O65-18 (MCO+) Always Below 1 Ω
      O57-48 (MIN-) - O65-19 (MCO-) Always Below 1 Ω
      O57-27 (MIN+) - Body ground Always 10 kΩ or higher
      O57-48 (MIN-) - Body ground Always 10 kΩ or higher
      O57-28 (SGND) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) 
    1. Disconnect the O65 DCM (telematics transceiver) connector.
    2. Disconnect the W4 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
      O65-33 (MCVD) - W4-4 (MACC) Always Below 1 Ω
      O65-34 (MCI+) - W4-3 (MCO+) Always Below 1 Ω
      O65-35 (MCI-) - W4-2 (MCO-) Always Below 1 Ω
      O65-33 (MCVD) - Body ground Always 10 kΩ or higher
      O65-34 (MCI+) - Body ground Always 10 kΩ or higher
      O65-35 (MCI-) - Body ground Always 10 kΩ or higher
      O65-32 (SGND) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. INSPECT RADIO RECEIVER ASSEMBLY 
    1. Disconnect the O65 DCM (telematics transceiver) connector.
    2. Reconnect the O57 radio receiver assembly connector.
      GTY505457Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Radio Receiver Assembly)
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O57-28 (SGND) - Body ground Always Below 1 Ω
      O57-48 (MIN-) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [09/2014 - 11/2017] 

    Result: 

    OK 

    See step  9

  9. INSPECT DCM (TELEMATICS TRANSCEIVER) 
    1. Reconnect the O65 DCM (telematics transceiver) connector.
    2. Measure the voltage according to the value(s) in the table below.
      GTY508668Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (DCM (Telematics Transceiver))

      Standard Voltage

      Tester Connection Condition Specified Condition
      O65-33 (MCVD) - Body ground Engine switch on (ACC) 4 to 6 V
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O65-35 (MCI-) - Body ground Always Below 1 Ω
      O65-32 (SGND) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to  REMOVAL [09/2014 - 11/2017] 

    Result: 

    OK 

    See step  10

  10. INSPECT MAP LIGHT ASSEMBLY 
    1. Remove the map light assembly (telephone microphone assembly).

      Refer to REMOVAL [09/2014 - 10/2015] , or refer to REMOVAL [10/2015 - 11/2017]

    2. Measure the resistance according to the value(s) in the table below.
      GTY467808Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Map Light Assembly (Telephone Microphone Assembly))

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 (SNS2) - 2 (MCO-) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  12

    Result: 

    OK 

    See step  11

  11. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) 
    1. Reconnect the O57 radio receiver assembly connector.
    2. Reconnect the W4 map light assembly (telephone microphone assembly) connector.
    3. Reconnect the O65 DCM (telematics transceiver) connector (w/ Manual (SOS) Switch).
    4. Turn the engine switch on (ACC).
    5. Connect an oscilloscope to terminals 3 (MCO+) and 2 (MCO-) of the W4 map light assembly (telephone microphone assembly) connector.
      GTY504703Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Map Light Assembly (Telephone Microphone Assembly))
    6. 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: 

    A 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [09/2014 - 11/2017] 

    Result: 

    B 

    See step  12

  12. REPLACE TELEPHONE MICROPHONE ASSEMBLY 
    1. Replace the telephone microphone assembly with a new or known good one.

      Refer to REMOVAL [09/2014 - 11/2017]

    2. Check if the same malfunction recurs.

      Result

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

    Result: 

    A 

    END 

    Result: 

    B 

    REPLACE MAP LIGHT ASSEMBLY. Refer to  REMOVAL [09/2014 - 10/2015]  , or refer to  REMOVAL [10/2015 - 11/2017] 

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