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Microphone Circuit Between Microphone And Navigation Receiver Assembly: Procedure

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

      Result

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

    B → See step   4 

    A: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) 
    1. Disconnect the H140 multi-media module 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

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  3. INSPECT MULTI-MEDIA MODULE RECEIVER ASSEMBLY 
    1. Reconnect the H140 multi-media module receiver assembly connector.
    2. Reconnect the T6 map light assembly (telephone microphone assembly) connector.
    3. Measure the voltage according to the value(s) in the table below.
      Fig 1: Identifying H140 Harness Connector Terminals
      GTY402080Courtesy 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
    4. 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
      (Multi-media Module Receiver Assembly)
    5. Proceed to the next step based on the inspection result.

      Result

      Result Proceed to
      NG A
      OK B

    B → See step   9 

    A → See step   14 

  4. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) 
    1. Disconnect the H140 multi-media module 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

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) 
    1. Disconnect the H140 multi-media module 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

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  6. 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

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  7. INSPECT MULTI-MEDIA MODULE RECEIVER ASSEMBLY 
    1. Disconnect the H67 DCM (telematics transceiver) connector.
    2. Reconnect the H140 multi-media module receiver assembly connector.
      Fig 2: Identifying H140 Harness Connector Terminals
      GTY404346Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. 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
      (Multi-media Module Receiver Assembly)

    NG → See step   12 

    OK: Go to next step 

  8. INSPECT DCM (TELEMATICS TRANSCEIVER) 
    1. Reconnect the H67 DCM (telematics transceiver) connector.
    2. Measure the voltage according to the value(s) in the table below.
      Fig 3: Identifying H67 Harness Connector Terminals
      GTY401501Courtesy 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
    3. 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))

    NG → See step   15 

    OK: Go to next step 

  9. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) 
    1. Remove the map light assembly (telephone microphone assembly).
    2. Measure the resistance according to the value(s) in the table below.
      Fig 4: Identifying MAP Light Assembly Connector Terminals
      GTY411480Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

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

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

    NG → See step   11 

    OK: Go to next step 

  10. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) 
    1. Reconnect the H140 multi-media module receiver assembly connector.
    2. Reconnect the H67 DCM (telematics transceiver) connector (w/ Manual (SOS) Switch).
    3. Reconnect the T6 map light assembly (telephone microphone assembly) connector.
    4. Turn the power switch on (ACC).
    5. Connect an oscilloscope to terminals 13 (MCO+) and 12 (MCO-) of the T6 map light assembly (telephone microphone assembly) connector.
      Fig 5: Identifying T6 Connector Terminals
      GTY351910Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Check the waveform of the 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))

    B → See step   11 

    A → See step   13 

  11. REPLACE TELEPHONE MICROPHONE ASSEMBLY 
    1. Replace the telephone microphone assembly. Refer to REMOVAL [08/2012 - ] .
    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 

  12. REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY. Refer to  REMOVAL [08/2012 - ] 
  13. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [08/2012 - ] 
  14. REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY. Refer to  REMOVAL [08/2012 - ] 
  15. REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to  REMOVAL [08/2012 - ] 
  16. REPLACE MAP LIGHT ASSEMBLY. Refer to  REMOVAL [08/2012 - ] 
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