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Microphone Circuit between Microphone and Navigation Receiver Assembly: Procedure

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

      Result

      Model Proceed to
      w/o Manual (SOS) Switch A
      w/ Manual (SOS) Switch B

    B → See step   17 

    A: Go to next step 

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

      Result

      Model Proceed to
      w/o Sliding Roof A
      w/ Sliding Roof B

    B → See step   8 

    A: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY) 
    1. Disconnect the L37 navigation receiver assembly connector.
      Fig 1: Identifying L37 Navigation Receiver Assembly Connector
      GTY230349Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the U3 map light assembly connector.
      Fig 2: Identifying U3 Map Light Assembly Connector
      GTY221733Courtesy 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
      L37-5 (SNS2) - U3-2 (SNS2) Always Below 1 Ω
      L37-17 (MACC) - U3-5 (MACC) Always Below 1 Ω
      L37-19 (MIN+) - U3-4 (MCO+) Always Below 1 Ω
      L37-20 (MIN-) - U3-3 (MCO-) Always Below 1 Ω
      L37-5 (SNS2) - Body ground Always 10 kΩ or higher
      L37-17 (MACC) - Body ground Always 10 kΩ or higher
      L37-19 (MIN+) - Body ground Always 10 kΩ or higher
      L37-20 (MIN-) - Body ground Always 10 kΩ or higher
      L37-18 (SGND) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Navigation Receiver Assembly)
      *2 Front view of wire harness connector
      (to Map Light Assembly)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  4. INSPECT NAVIGATION RECEIVER ASSEMBLY 
    1. Disconnect the U3 map light assembly connector.
    2. Reconnect the L37 navigation receiver assembly connector.
      Fig 3: Identifying L37 Navigation Receiver Assembly Connector
      GTY231125Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      L37-17 (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
      L37-18 (SGND) - Body ground Always Below 1 Ω
      L37-20 (MIN-) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Component with harness connected
      (Navigation Receiver Assembly)

    NG → See step   14 

    OK: Go to next step 

  5. INSPECT MAP LIGHT ASSEMBLY 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 4: Identifying U3 Map Light Assembly Connector
      GTY230420Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      U3-2 (SNS2) - U3-3 (MCO-) Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Component without harness connected
      (Map Light Assembly)

    NG → See step   13 

    OK: Go to next step 

  6. INSPECT MAP LIGHT ASSEMBLY 
    1. Reconnect the L37 navigation receiver assembly connector.
    2. Reconnect the U3 map light assembly connector.
      Fig 5: Identifying U3 Map Light Assembly Connector
      GTY219267Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Turn the power switch on (ACC).
    4. Connect an oscilloscope to terminals 4 (MCO+) and 3 (MCO-) of the U3 map light assembly connector.
    5. 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 is output A
      A waveform synchronized with the voice input to the map light assembly is not output B
      TEXT IN ILLUSTRATION

      *1 Component with harness connected
      (Map Light Assembly)

    B → See step   13 

    A → See step   7 

  7. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
  8. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY) 
    1. Disconnect the L37 navigation receiver assembly connector.
      Fig 6: Identifying L37 Navigation Receiver Assembly Connector
      GTY230350Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the U13 map light assembly connector.
      Fig 7: Identifying U13 Map Light Assembly Connector
      GTY222989Courtesy 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
      L37-5 (SNS2) - U13-3 (SNS2) Always Below 1 Ω
      L37-17 (MACC) - U13-6 (MACC) Always Below 1 Ω
      L37-19 (MIN+) - U13-5 (MCO+) Always Below 1 Ω
      L37-20 (MIN-) - U13-4 (MCO-) Always Below 1 Ω
      L37-5 (SNS2) - Body ground Always 10 kΩ or higher
      L37-17 (MACC) - Body ground Always 10 kΩ or higher
      L37-19 (MIN+) - Body ground Always 10 kΩ or higher
      L37-20 (MIN-) - Body ground Always 10 kΩ or higher
      L37-18 (SGND) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Navigation Receiver Assembly)
      *2 Front view of wire harness connector
      (to Map Light Assembly)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  9. INSPECT NAVIGATION RECEIVER ASSEMBLY 
    1. Disconnect the U3 map light assembly connector.
    2. Reconnect the L37 navigation receiver assembly connector.
      Fig 8: Identifying L37 Navigation Receiver Assembly Connector
      GTY231125Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      L37-17 (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
      L37-18 (SGND) - Body ground Always Below 1 Ω
      L37-20 (MIN-) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Component with harness connected
      (Navigation Receiver Assembly)

    NG → See step   15 

    OK: Go to next step 

  10. INSPECT MAP LIGHT ASSEMBLY 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 9: Identifying U13 Map Light Assembly Connector
      GTY214262Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      U13-3 (SNS2) - U13-4 (MCO-) Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Component without harness connected
      (Map Light Assembly)

    NG → See step   13 

    OK: Go to next step 

  11. INSPECT MAP LIGHT ASSEMBLY 
    1. Reconnect the L37 navigation receiver assembly connector.
    2. Reconnect the U13 map light assembly connector.
      Fig 10: Identifying U13 Map Light Assembly Connector
      GTY227812Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Turn the power switch on (ACC).
    4. Connect an oscilloscope to terminals 5 (MCO+) and 4 (MCO-) of the U13 map light assembly connector.
    5. 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 is output A
      A waveform synchronized with the voice input to the map light assembly is not output B
      TEXT IN ILLUSTRATION

      *1 Component with harness connected
      (Map Light Assembly)

    B → See step   13 

    A → See step   12 

  12. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
  13. REPLACE TELEPHONE MICROPHONE ASSEMBLY 
    1. Replace the telephone microphone assembly.

      HINT: 

      • w/o Sliding Roof. Refer to REMOVAL
      • w/ Sliding Roof. 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 

  14. REPLACE NAVIGATION RECEIVER ASSEMBLY. Refer to  REMOVAL 
  15. REPLACE NAVIGATION RECEIVER ASSEMBLY. Refer to  REMOVAL 
  16. REPLACE MAP LIGHT ASSEMBLY. Refer to  REMOVAL 
  17. CONFIRM MODEL 
    1. Choose the model to be inspected.

      Result

      Model Proceed to
      w/o Sliding Roof A
      w/ Sliding Roof B

    B → See step   26 

    A: Go to next step 

  18. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY) 
    1. Disconnect the L37 navigation receiver assembly connector.
      Fig 11: Identifying L37 Navigation Receiver Assembly Connector
      GTY230353Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the U3 map light assembly connector.
      Fig 12: Identifying U3 Map Light Assembly Connector
      GTY221730Courtesy 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
      L37-5 (SNS2) - U3-2 (SNS2) Always Below 1 Ω
      L37-5 (SNS2) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Navigation Receiver Assembly)
      *2 Front view of wire harness connector
      (to Map Light Assembly)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  19. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - DCM) 
    1. Disconnect the L37 navigation receiver assembly connector.
      Fig 13: Identifying L37 Navigation Receiver Assembly Connector
      GTY230355Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the L19 DCM (telematics transceiver) connector.
      Fig 14: Identifying L19 DCM Connector
      GTY222752Courtesy 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
      L37-19 (MIN+) - L19-18 (MCO+) Always Below 1 Ω
      L37-20 (MIN-) - L19-19 (MCO-) Always Below 1 Ω
      L37-19 (MIN+) - Body ground Always 10 kΩ or higher
      L37-20 (MIN-) - Body ground Always 10 kΩ or higher
      L37-18 (SGND) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Navigation Receiver Assembly)
      *2 Front view of wire harness connector
      (to DCM (Telematics Transceiver))

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  20. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - MAP LIGHT ASSEMBLY) 
    1. Disconnect the L19 DCM (telematics transceiver) connector.
      Fig 15: Identifying L19 DCM Connector
      GTY222755Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the U3 map light assembly connector.
      Fig 16: Identifying U3 Map Light Assembly Connector
      GTY221731Courtesy 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
      L19-33 (MCVD) - U3-5 (MACC) Always Below 1 Ω
      L19-34 (MCI+) - U3-4 (MCO+) Always Below 1 Ω
      L19-35 (MCI-) - U3-3 (MCO-) Always Below 1 Ω
      L19-33 (MCVD) - Body ground Always 10 kΩ or higher
      L19-34 (MCI+) - Body ground Always 10 kΩ or higher
      L19-35 (MCI-) - Body ground Always 10 kΩ or higher
      L19-32 (SGND) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to DCM (Telematics Transceiver))
      *2 Front view of wire harness connector
      (to Map Light Assembly)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  21. INSPECT NAVIGATION RECEIVER ASSEMBLY 
    1. Reconnect the L37 navigation receiver assembly connector.
      Fig 17: Identifying L37 Navigation Receiver Assembly Connector
      GTY231128Courtesy 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
      L37-18 (SGND) - Body ground Always Below 1 Ω
      L37-20 (MIN-) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Component with harness connected
      (Navigation Receiver Assembly)

    NG → See step   35 

    OK: Go to next step 

  22. INSPECT DCM (TELEMATICS TRANSCEIVER) 
    1. Reconnect the L19 DCM (telematics transceiver) connector.
      Fig 18: Identifying L19 DCM Connector
      GTY218389Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      L19-33 (MCVD) - Body ground Power switch on (ACC) 5 V
      TEXT IN ILLUSTRATION

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

    NG → See step   37 

    OK: Go to next step 

  23. INSPECT MAP LIGHT ASSEMBLY 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 19: Identifying U3 Map Light Assembly Connector
      GTY230420Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      U3-2 (SNS2) - U3-3 (MCO-) Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Component without harness connected
      (Map Light Assembly)

    NG → See step   33 

    OK: Go to next step 

  24. INSPECT MAP LIGHT ASSEMBLY 
    1. Reconnect the L37 navigation receiver assembly connector.
    2. Reconnect the U3 map light assembly connector.
      Fig 20: Identifying U3 Map Light Assembly Connector
      GTY219267Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Turn the power switch on (ACC).
    4. Connect an oscilloscope to terminals 4 (MCO+) and 3 (MCO-) of the U3 map light assembly connector.
    5. 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 is output A
      A waveform synchronized with the voice input to the map light assembly is not output B
      TEXT IN ILLUSTRATION

      *1 Component with harness connected
      (Map Light Assembly)

    B → See step   33 

    A → See step   25 

  25. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
  26. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY) 
    1. Disconnect the L37 navigation receiver assembly connector.
      Fig 21: Identifying L37 Navigation Receiver Assembly Connector
      GTY230356Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the U13 map light assembly connector.
      Fig 22: Identifying U13 Map Light Assembly Connector
      GTY222994Courtesy 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
      L37-5 (SNS2) - U13-3 (SNS2) Always Below 1 Ω
      L37-5 (SNS2) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Navigation Receiver Assembly)
      *2 Front view of wire harness connector
      (to Map Light Assembly)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  27. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - DCM) 
    1. Disconnect the L37 navigation receiver assembly connector.
      Fig 23: Identifying L37 Navigation Receiver Assembly Connector
      GTY230355Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the L19 DCM (telematics transceiver) connector.
      Fig 24: Identifying L19 DCM Connector
      GTY222754Courtesy 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
      L37-19 (MIN+) - L19-18 (MCO+) Always Below 1 Ω
      L37-20 (MIN-) - L19-19 (MCO-) Always Below 1 Ω
      L37-19 (MIN+) - Body ground Always 10 kΩ or higher
      L37-20 (MIN-) - Body ground Always 10 kΩ or higher
      L37-18 (SGND) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Navigation Receiver Assembly)
      *2 Front view of wire harness connector
      (to DCM (Telematics Transceiver))

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  28. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - MAP LIGHT ASSEMBLY) 
    1. Disconnect the L19 DCM (telematics transceiver) connector.
      Fig 25: Identifying L19 DCM Connector
      GTY234609Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the U13 map light assembly connector.
      Fig 26: Identifying U13 Map Light Assembly Connector
      GTY222993Courtesy 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
      L19-33 (MCVD) - U13-6 (MACC) Always Below 1 Ω
      L19-34 (MCI+) - U13-5 (MCO+) Always Below 1 Ω
      L19-35 (MCI-) - U13-4 (MCO-) Always Below 1 Ω
      L19-33 (MCVD) - Body ground Always 10 kΩ or higher
      L19-34 (MCI+) - Body ground Always 10 kΩ or higher
      L19-35 (MCI-) - Body ground Always 10 kΩ or higher
      L19-32 (SGND) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to DCM (Telematics Transceiver))
      *2 Front view of wire harness connector
      (to Map Light Assembly)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  29. INSPECT NAVIGATION RECEIVER ASSEMBLY 
    1. Reconnect the L37 navigation receiver assembly connector.
      Fig 27: Identifying L37 Navigation Receiver Assembly Connector
      GTY231127Courtesy 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
      L37-18 (SGND) - Body ground Always Below 1 Ω
      L37-20 (MIN-) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Component with harness connected
      (Navigation Receiver Assembly)

    NG → See step   35 

    OK: Go to next step 

  30. INSPECT DCM (TELEMATICS TRANSCEIVER) 
    1. Reconnect the L19 DCM (telematics transceiver) connector.
      Fig 28: Identifying L19 DCM Connector
      GTY218389Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      L19-33 (MCVD) - Body ground Power switch on (ACC) 5 V
      TEXT IN ILLUSTRATION

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

    NG → See step   37 

    OK: Go to next step 

  31. INSPECT MAP LIGHT ASSEMBLY 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 29: Identifying U13 Map Light Assembly Connector
      GTY214262Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      U13-3 (SNS2) - U13-4 (MCO-) Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Component without harness connected
      (Map Light Assembly)

    NG → See step   33 

    OK: Go to next step 

  32. INSPECT MAP LIGHT ASSEMBLY 
    1. Reconnect the L37 navigation receiver assembly connector.
    2. Reconnect the U13 map light assembly connector.
      Fig 30: Identifying U13 Map Light Assembly Connector
      GTY227812Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Turn the power switch on (ACC).
    4. Connect an oscilloscope to terminals 5 (MCO+) and 4 (MCO-) of the U13 map light assembly connector.
    5. 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 is output A
      A waveform synchronized with the voice input to the map light assembly is not output B
      TEXT IN ILLUSTRATION

      *1 Component with harness connected
      (Map Light Assembly)

    B → See step   33 

    A → See step   34 

  33. REPLACE TELEPHONE MICROPHONE ASSEMBLY 
    1. Replace the telephone microphone assembly.

      HINT: 

      • w/o Sliding Roof. Refer to REMOVAL
      • w/ Sliding Roof. 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   36 

    A → END 

  34. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
  35. REPLACE NAVIGATION RECEIVER ASSEMBLY. Refer to  REMOVAL 
  36. REPLACE MAP LIGHT ASSEMBLY. Refer to  REMOVAL 
  37. REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to  REMOVAL 
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