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Microphone Circuit between Microphone and Radio Receiver: Procedure

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

      Result

      Result Proceed to
      w/ Manual (SOS) Switch A
      w/o Manual (SOS) Switch (w/o Sliding Roof System) B
      w/o Manual (SOS) Switch (w/ Sliding Roof System) C

    B → See step   9 

    C → See step   14 

    A: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - INNER REAR VIEW MIRROR ASSEMBLY - AMPLIFIER MICROPHONE ASSEMBLY) 
    1. Disconnect the E11 DCM (telematics transceiver) connector.
    2. Disconnect the N2 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
      E11-33 (MCVD) - N2-9 (ACC) Always Below 1 Ω
      E11-34 (MCI+) - N2-11 (MIC+) Always Below 1 Ω
      E11-35 (MCI-) - N2-12 (MIC-) Always Below 1 Ω
      E11-33 (MCVD) - Body ground Always 10 kΩ or higher
      E11-34 (MCI+) - Body ground Always 10 kΩ or higher
      E11-35 (MCI-) - Body ground Always 10 kΩ or higher
      E11-32 (SGND) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - DCM - TELEMATICS TRANSCEIVER) 
    1. Disconnect the E5 radio and display receiver assembly connector.
    2. Disconnect the E11 DCM (telematics transceiver) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E5-5 (MIN+) - E11-18 (MCO+) Always Below 1 Ω
      E5-19 (MIN-) - E11-19 (MCO-) Always Below 1 Ω
      E5-5 (MIN+) - Body ground Always 10 kΩ or higher
      E5-19 (MIN-) - Body ground Always 10 kΩ or higher
      E5-18 (SGND) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - INNER REAR VIEW MIRROR ASSEMBLY - AMPLIFIER MICROPHONE ASSEMBLY) 
    1. Disconnect the E5 radio and display receiver assembly connector.
    2. Disconnect the N2 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
      E5-6 (SNS2) - N2-10 (SGND) Always Below 1 Ω
      E5-6 (SNS2) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  5. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY 
    1. Disconnect the E11 DCM (telematics transceiver) connector.
    2. Reconnect the E5 radio and display receiver assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      Fig 1: Measuring Resistance Of Radio & Display Receiver Assembly Connector
      GTY383022Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      E5-18 (SGND) - Body ground Always Below 1 Ω
      E5-19 (MIN-) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Radio and Display Receiver Assembly)

    NG → See step   20 

    OK: Go to next step 

  6. INSPECT DCM (TELEMATICS TRANSCEIVER) 
    1. Reconnect the E11 DCM (telematics transceiver) connector.
    2. Measure the voltage according to the value(s) in the table below.
      Fig 2: Measuring Voltage Of DCM (Telematics Transceiver) Connector
      GTY368370Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Condition Specified Condition
      E11-33 (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
      E11-35 (MCI-) - Body ground Always Below 1 Ω
      E11-32 (SGND) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

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

    NG → See step   21 

    OK: Go to next step 

  7. INSPECT INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) 
    1. Remove the inner rear view mirror assembly (amplifier microphone assembly).
    2. Measure the resistance according to the value(s) in the table below.
      Fig 3: Measuring Resistance Of Inner Rear View Mirror Assembly (Amplifier Microphone Assembly) Connector
      GTY361731Courtesy 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)

    NG → See step   18 

    OK: Go to next step 

  8. INSPECT INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) 
    1. Reconnect the E5 radio and display receiver assembly connector.
    2. Reconnect the E11 DCM (telematics transceiver) connector.
    3. Reconnect the N2 inner rear view mirror assembly (amplifier microphone assembly) connector.
    4. Turn the engine switch on (ACC).
    5. Connect an oscilloscope to terminals 11 (MIC+) and 12 (MIC-) of the N2 inner rear view mirror assembly (amplifier microphone assembly) connector.
      Fig 4: Identifying Inner Rear View Mirror Assembly (Amplifier Microphone Assembly) Connector Terminals
      GTY374652Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. 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)

    B → See step   18 

    A → See step   19 

  9. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - ROOF CONSOLE BOX ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY) 
    1. Disconnect the E5 radio and display receiver assembly connector.
    2. Disconnect the N6 roof console box 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
      E5-4 (MACC) - N6-14 (MACC) Always Below 1 Ω
      E5-5 (MIN+) - N6-13 (MCO+) Always Below 1 Ω
      E5-19 (MIN-) - N6-12 (MCO-) Always Below 1 Ω
      E5-6 (SNS2) - N6-15 (SNS2) Always Below 1 Ω
      E5-4 (MACC) - Body ground Always 10 kΩ or higher
      E5-5 (MIN+) - Body ground Always 10 kΩ or higher
      E5-19 (MIN-) - Body ground Always 10 kΩ or higher
      E5-18 (SGND) - Body ground Always 10 kΩ or higher
      E5-6 (SNS2) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  10. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY 
    1. Reconnect the E5 radio and display receiver assembly connector.
    2. Reconnect the N6 roof console box assembly (telephone microphone assembly) connector.
    3. Measure the voltage according to the value(s) in the table below.
      Fig 5: Measuring Voltage Of Radio & Display Receiver Assembly Connector
      GTY371322Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Condition Specified Condition
      E5-4 (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
      E5-18 (SGND) - Body ground Always Below 1 Ω
      E5-19 (MIN-) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Radio and Display Receiver Assembly)

    NG → See step   20 

    OK: Go to next step 

  11. INSPECT ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) 
    1. Remove the roof console box assembly (telephone microphone assembly).
    2. Measure the resistance according to the value(s) in the table below.
      Fig 6: Measuring Resistance Of Roof Console Box Assembly (Telephone Microphone Assembly) Connector
      GTY382841Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

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

      *a Component without harness connected
      (Roof Console Box Assembly - Telephone Microphone Assembly)

    NG → See step   13 

    OK: Go to next step 

  12. INSPECT ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) 
    1. Reconnect the E5 radio and display receiver assembly connector.
    2. Reconnect the N6 roof console box assembly (telephone microphone assembly) connector.
    3. Turn the engine switch on (ACC).
    4. Connect an oscilloscope to terminals 13 (MCO+) and 12 (MCO-) of the N6 roof console box assembly (telephone microphone assembly) connector.
      Fig 7: Identifying Roof Console Box Assembly (Telephone Microphone Assembly) Connector Terminals
      GTY377830Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Check the waveform of the roof console box assembly (telephone microphone assembly) using the oscilloscope.

      Result

      Result Proceed to
      A waveform synchronized with the voice input to the roof console box assembly (telephone microphone assembly) is output A
      A waveform synchronized with the voice input to the roof console box assembly (telephone microphone assembly) is not output B
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Roof Console Box Assembly - Telephone Microphone Assembly)

    B → See step   13 

    A → See step   19 

  13. REPLACE TELEPHONE MICROPHONE ASSEMBLY 
    1. Replace the telephone microphone assembly. Refer to REMOVAL .
    2. Check if the same malfunction recurs.

      Result

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

    B → See step   22 

    A → END 

  14. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - INNER REAR VIEW MIRROR ASSEMBLY - AMPLIFIER MICROPHONE ASSEMBLY) 
    1. Disconnect the E5 radio and display receiver assembly connector.
    2. Disconnect the N2 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
      E5-4 (MACC) - N2-9 (ACC) Always Below 1 Ω
      E5-5 (MIN+) - N2-11 (MIC+) Always Below 1 Ω
      E5-19 (MIN-) - N2-12 (MIC-) Always Below 1 Ω
      E5-6 (SNS2) - N2-10 (SGND) Always Below 1 Ω
      E5-4 (MACC) - Body ground Always 10 kΩ or higher
      E5-5 (MIN+) - Body ground Always 10 kΩ or higher
      E5-19 (MIN-) - Body ground Always 10 kΩ or higher
      E5-18 (SGND) - Body ground Always 10 kΩ or higher
      E5-6 (SNS2) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  15. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY 
    1. Reconnect the E5 radio and display receiver assembly connector.
    2. Reconnect the N2 inner rear view mirror assembly (amplifier microphone assembly) connector.
    3. Measure the voltage according to the value(s) in the table below.
      Fig 8: Measuring Voltage Of Radio & Display Receiver Assembly Connector
      GTY371322Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Condition Specified Condition
      E5-4 (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
      E5-18 (SGND) - Body ground Always Below 1 Ω
      E5-19 (MIN-) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Radio and Display Receiver Assembly)

    NG → See step   20 

    OK: Go to next step 

  16. INSPECT INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) 
    1. Remove the inner rear view mirror assembly (amplifier microphone assembly).
    2. Measure the resistance according to the value(s) in the table below.
      Fig 9: Measuring Resistance Of Inner Rear View Mirror Assembly (Amplifier Microphone Assembly) Connector
      GTY361731Courtesy 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)

    NG → See step   18 

    OK: Go to next step 

  17. INSPECT INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) 
    1. Reconnect the E5 radio and display receiver assembly connector.
    2. Reconnect the N2 inner rear view mirror assembly (amplifier microphone assembly) connector.
    3. Turn the engine switch on (ACC).
    4. Connect an oscilloscope to terminals 11 (MIC+) and 12 (MIC-) of the N2 inner rear view mirror assembly (amplifier microphone assembly) connector.
      Fig 10: Identifying Inner Rear View Mirror Assembly (Amplifier Microphone Assembly) Connector Terminals
      GTY374652Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. 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)

    B → See step   18 

    A → See step   19 

  18. REPLACE INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY). Refer to  REMOVAL 
  19. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
  20. REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL 
  21. REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to  REMOVAL 
  22. REPLACE ROOF CONSOLE BOX ASSEMBLY. Refer to  REMOVAL 
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