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Microphone Circuit between Microphone and Multi-display: Procedure

  1. CHECK DISPLAY AND NAVIGATION MODULE DISPLAY 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 1: Inspecting Display And Navigation Module Display
      GTY277247Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      L59-7 (SGND) - Body ground Always Below 1 Ω
      L59-6 (MIN-) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Display and Navigation Module Display)

    NG → See step   13 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - MAP LIGHT ASSEMBLY) 
    1. Disconnect the L59 display and navigation module display connector.
    2. Disconnect the X4 map light assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      w/ Manual (SOS) Switch 

      w/o Manual (SOS) Switch 

      Tester Connection Condition Specified Condition
      L59-20 (SNS2) - X4-31 (SIN2) Always Below 1 Ω
      Tester Connection Condition Specified Condition
      L59-5 (MIN+) - X4-21 (MI1+) Always Below 1 Ω
      L59-6 (MIN-) - X4-20 (MIC-) Always Below 1 Ω
      L59-4 (MACC) - X4-22 (ACC) Always Below 1 Ω
      L59-20 (SNS2) - X4-31 (SIN2) Always Below 1 Ω
      L59-5 (MIN+) - Body ground Always 10 kΩ or higher
      L59-6 (MIN-) - Body ground Always 10 kΩ or higher
      L59-4 (MACC) - Body ground Always 10 kΩ or higher
      L59-20 (SNS2) - Body ground Always 10 kΩ or higher
      L59-7 (SGND) - Body ground Always 10 kΩ or higher
      RESULT

      Result Proceed to
      OK (w/ Manual (SOS) Switch) A
      OK (w/o Manual (SOS) Switch) B
      NG C

    B → See step   9 

    C → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    A: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - TELEMATICS TRANSCEIVER) 
    1. Disconnect the L59 display and navigation module display connector.
    2. Disconnect the L111 telematics transceiver connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      L59-5 (MIN+) - L111-18 (MCO+) Always Below 1 Ω
      L59-6 (MIN-) - L111-19 (MCO-) Always Below 1 Ω
      L59-5 (MIN+) - Body ground Always 10 kΩ or higher
      L59-6 (MIN-) - Body ground Always 10 kΩ or higher
      L59-7 (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 (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY) 
    1. Disconnect the L111 telematics transceiver connector.
    2. Disconnect the X4 map light assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      L111-33 (MCVD) - X4-22 (ACC) Always Below 1 Ω
      L111-34 (MCI+) - X4-21 (MI1+) Always Below 1 Ω
      L111-35 (MCI-) - X4-20 (MIC-) Always Below 1 Ω
      L111-33 (MCVD) - Body ground Always 10 kΩ or higher
      L111-34 (MCI+) - Body ground Always 10 kΩ or higher
      L111-35 (MCI-) - Body ground Always 10 kΩ or higher
      L111-32 (SGND) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  5. CHECK TELEMATICS TRANSCEIVER 
    1. Measure the voltage according to the value(s) in the table below.
      Fig 2: Identifying L111 Telematics Transceiver Terminals
      GTY286993Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      L111-33 (MCVD) - Body ground Engine switch on (ACC) 5 V
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Telematics Transceiver)

    NG → See step   14 

    OK: Go to next step 

  6. CHECK MAP LIGHT ASSEMBLY 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 3: Identifying X4 Telephone Microphone Assembly Connector Terminals
      GTY258696Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      X4-31 (SIN2) - X4-20 (MIC-) Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Map Light Assembly)

    NG → See step   8 

    OK: Go to next step 

  7. CHECK MAP LIGHT ASSEMBLY 
    1. Reconnect the L59 display and navigation module display connector.
      Fig 4: Identifying X4 Telephone Microphone Assembly Connector Terminals
      GTY257561Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reconnect the L111 telematics transceiver connector.
    3. Reconnect the X4 map light assembly connector.
    4. Turn the engine switch on (ACC).
    5. Connect an oscilloscope to terminals 21 (MI1+) and 20 (MIC-) of the X4 telephone microphone assembly connector.
    6. Check the waveform of the telephone microphone assembly using the oscilloscope.
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Map Light Assembly)
      RESULT

      Result Proceed to
      Waveform synchronized with the voice input to the map light assembly is output A
      Waveform synchronized with the voice input to the map light assembly is not output B

    B → See step   8 

    A → See step   15 

  8. 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   16 

    A → END 

  9. CHECK DISPLAY AND NAVIGATION MODULE DISPLAY 
    1. Reconnect the L59 display and navigation module display connector.
      Fig 5: Identifying L59 Display And Navigation Module Display Connector Terminals
      GTY277541Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      L59-4 (MACC) - Body ground Engine switch on (ACC) 5 V
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Display and Navigation module Display)

    NG → See step   13 

    OK: Go to next step 

  10. CHECK MAP LIGHT ASSEMBLY 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 6: Identifying X4 Telephone Microphone Assembly Connector Terminals
      GTY258696Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      X4-31 (SIN2) - X4-20 (MIC-) Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Map Light Assembly)

    NG → See step   12 

    OK: Go to next step 

  11. CHECK MAP LIGHT ASSEMBLY 
    1. Reconnect the L59 display and navigation module display connector.
      Fig 7: Identifying X4 Telephone Microphone Assembly Connector Terminals
      GTY257561Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reconnect the X4 map light assembly connector.
    3. Turn the engine switch on (ACC).
    4. Connect an oscilloscope to terminals 21 (MI1+) and 20 (MIC-) of the X4 telephone microphone assembly connector.
    5. Check the waveform of the telephone microphone assembly using the oscilloscope.
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Map Light Assembly)
      RESULT

      Result Proceed to
      Waveform synchronized with the voice input to the map light assembly is output A
      Waveform synchronized with the voice input to the map light assembly is not output B

    B → See step   12 

    A → See step   15 

  12. CHECK 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

    NG → See step   16 

    OK → END 

  13. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to  REMOVAL 
  14. REPLACE TELEMATICS TRANSCEIVER. Refer to  REMOVAL 
  15. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
  16. REPLACE MAP LIGHT ASSEMBLY. Refer to  REMOVAL 
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