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Microphone Circuit between Microphone and Navigation Receiver Assembly [08/2018 - 08/2021]: Procedure

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

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

    Result: 

    B 

    See step  5

    Result: 

    A 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY) 
    1. Disconnect the H11 multi-media module receiver assembly connector.
    2. Disconnect the W18 telephone microphone assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H11-27 (MIN+) - W18-2 (MCO+) Always Below 1 Ω
      H11-29 (MACC) - W18-1 (MACC) Always Below 1 Ω
      H11-48 (MIN-) - W18-4 (MCO-) Always Below 1 Ω
      H11-49 (SNS2) - W18-3 (SNS2) Always Below 1 Ω
      H11-27 (MIN+) - Body ground Always 10 kΩ or higher
      H11-28 (SGND) - Body ground Always 10 kΩ or higher
      H11-29 (MACC) - Body ground Always 10 kΩ or higher
      H11-48 (MIN-) - Body ground Always 10 kΩ or higher
      H11-49 (SNS2) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

  3. CHECK MULTI-MEDIA MODULE RECEIVER ASSEMBLY 
    1. Measure the voltage according to the value(s) in the table below.
      GTY615732Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      H11-29 (MACC) - Body ground Engine switch on (ACC) 4 to 6 V
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H11-28 (SGND) - Body ground Always Below 1 Ω
      H11-48 (MIN-) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Multi-media Module Receiver Assembly)

    Result: 

    NG 

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY 

    (Refer to REMOVAL [08/2015 - 08/2021] )

    Result: 

    OK 

    See step  4

  4. CHECK TELEPHONE MICROPHONE ASSEMBLY 
    1. Replace the telephone microphone assembly with a new or normally functioning one (Refer to REMOVAL [08/2018 - ] ).
    2. Check if the same malfunction recurs.

      OK

      Malfunction disappears.

    Result: 

    OK 

    END (TELEPHONE MICROPHONE ASSEMBLY IS DEFECTIVE) 

    Result: 

    NG 

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY 

    (Refer to REMOVAL [08/2015 - 08/2021] )

  5. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY) 
    1. Disconnect the H11 multi-media module receiver assembly connector.
    2. Disconnect the W18 telephone microphone assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H11-49 (SNS2) - W18-3 (SNS2) Always Below 1 Ω

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY -DCM [TELEMATICS TRANSCEIVER]) 
    1. Disconnect the H11 multi-media module receiver assembly connector.
    2. Disconnect the G56 DCM (telematics transceiver) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H11-27 (MIN+) - G56-18 (MCO+) Always Below 1 Ω
      H11-48 (MIN-) - G56-19 (MCO-) Always Below 1 Ω
      H11-27 (MIN+) - Body ground Always 10 kΩ or higher
      H11-48 (MIN-) - Body ground Always 10 kΩ or higher
      H11-28 (SGND) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (DCM [TELEMATICS TRANSCEIVER] - TELEPHONE MICROPHONE ASSEMBLY) 
    1. Disconnect the G56 DCM (telematics transceiver) connector.
    2. Disconnect the W18 telephone microphone assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G56-33 (MCVD) - W18-1 (MACC) Always Below 1 Ω
      G56-34 (MCI+) - W18-2 (MCO+) Always Below 1 Ω
      G56-35 (MCI-) - W18-4 (MCO-) Always Below 1 Ω
      G56-33 (MCVD) - Body ground Always 10 kΩ or higher
      G56-34 (MCI+) - Body ground Always 10 kΩ or higher
      G56-35 (MCI-) - Body ground Always 10 kΩ or higher
      G56-32 (SGND) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. CHECK MULTI-MEDIA MODULE RECEIVER ASSEMBLY 
    1. Disconnect the G56 DCM (telematics transceiver) connector.
      GTY641552Courtesy 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
      H11-28 (SGND) - Body ground Always Below 1 Ω
      H11-48 (MIN-) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Multi-media Module Receiver Assembly)

    Result: 

    NG 

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY 

    (Refer to REMOVAL [08/2015 - 08/2021] )

    Result: 

    OK 

    See step  9

  9. CHECK DCM (TELEMATICS TRANSCEIVER) 
    1. Measure the voltage according to the value(s) in the table below.
      GTY636516Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      G56-33 (MCVD) - Body ground Engine switch on (ACC) 4 to 6 V
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G56-32 (SGND) - Body ground Always Below 1 Ω
      G56-35 (MCI-) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (DCM [Telematics Transceiver])

    Result: 

    NG 

    REPLACE DCM (TELEMATICS TRANSCEIVER) 

    Result: 

    OK 

    See step  10

  10. CHECK TELEPHONE MICROPHONE ASSEMBLY 
    1. Replace the telephone microphone assembly with a new or normally functioning one (Refer to REMOVAL [08/2018 - ] ).
    2. Check if the same malfunction recurs.

      OK

      Malfunction disappears.

    Result: 

    OK 

    END (TELEPHONE MICROPHONE ASSEMBLY IS DEFECTIVE) 

    Result: 

    NG 

    See step  11

  11. CHECK DCM (TELEMATICS TRANSCEIVER) 
    1. Replace the DCM telematics transceiver assembly with a new or normally functioning one (Refer to REMOVAL [08/2018 - 08/2021] ).
    2. Check if the same malfunction recurs.

      OK

      Malfunction disappears.

    Result: 

    OK 

    END (DCM [TELEMATICS TRANSCEIVER] IS DEFECTIVE) 

    Result: 

    NG 

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY 

    (Refer to REMOVAL [08/2015 - 08/2021] )

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