NAVIGATION SYSTEM Microphone Circuit

DESCRIPTION

w/ Telematics Transceiver for G-BOOK:


w/o Telematics Transceiver or w/ Telematics Transceiver except G-BOOK:


WIRING DIAGRAM

B005B7JE11
B005BFGE04

CAUTION / NOTICE / HINT

Note

When replacing the radio receiver assembly, always replace it with a new one.

If a radio receiver assembly which was installed to another vehicle is used, the following may occur:


  • A communication malfunction DTC may be stored.

  • The radio receiver assembly may not operate normally.

Tech Tips

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System.

Click here

PROCEDURE


  1. CHECK VEHICLE TYPE


    1. Check the vehicle type. Refer to Check Microphone (Input to navigation ECU) in Operation Check.

      Click here

      Result
      Result Proceed to
      w/o Recording Function A
      w/ Recording Function B

    B

    CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO NAVIGATION ECU) Click here

    A

  2. CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO NAVIGATION ECU)


    1. B0059DR

      Enter the "Microphone Check" screen. Refer to Check Microphone (Input to navigation ECU) in Operation Check.

      Click here

    2. When voice is input into the microphone, check that the microphone input level meter changes according to the input voice.

      Tech Tips

      The microphone is active at all times when "Microphone Check" screen is displayed.

      OK
      Microphone input level meter changes according to the input voice.
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  3. CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO RADIO RECEIVER ASSEMBLY)


    1. B0059DR

      Enter the "Microphone Check" screen. Refer to Check Microphone (Input to radio receiver assembly) in Operation Check.

      Click here

    2. When voice is input into the microphone, check that the microphone input level meter changes according to the input voice.

      Tech Tips

      The microphone is active at all times when "Microphone Check" screen is displayed.

      OK
      Microphone input level meter changes according to the input voice.
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (RADIO RECEIVER ASSEMBLY - NAVIGATION ECU)

    NG

    GO TO STEP 6 Click here

  4. CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO NAVIGATION ECU)


    1. B005A78

      Enter the "Microphone Check" screen. Refer to Check Microphone (Input to navigation ECU) in Operation Check.

      Click here

    2. When voice is input into the microphone, check that the microphone input level meter changes according to the input voice.

      Tech Tips

      The microphone is active at all times when "Microphone Check" screen is displayed.

    3. Push the recording switch and perform voice recording.

      Tech Tips


      • Select the recording switch with the blower motor of the air conditioning system stopped. If an outlet of the air conditioning system is facing the microphone, noise may be recorded.

      • Voice can be recorded for up to 5 seconds.

    4. Check that the recording indicator remains on while recording and that the recorded voice is played normally without noise or distortion.

      OK
      All check results are normal.
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  5. CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO RADIO RECEIVER ASSEMBLY)


    1. B005A78

      Enter the "Microphone Check" screen. Refer to Check Microphone (Input to radio receiver assembly) in Operation Check.

      Click here

    2. When voice is input into the microphone, check that the microphone input level meter changes according to the input voice.

      Tech Tips

      The microphone is active at all times when "Microphone Check" screen is displayed.

    3. Push the recording switch and perform voice recording.

      Tech Tips


      • Select the recording switch with the blower motor of the air conditioning system stopped. If an outlet of the air conditioning system is facing the microphone, noise may be recorded.

      • Voice can be recorded for up to 5 seconds.

    4. Check that the recording indicator remains on while recording and that the recorded voice is played normally without noise or distortion.

      OK
      All check results are normal.
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (RADIO RECEIVER ASSEMBLY - NAVIGATION ECU)

    NG

  6. CHECK VEHICLE TYPE


    1. Check the vehicle type.

      Result
      Result Proceed to
      w/ Telematics Transceiver for G-BOOK A
      w/o Telematics Transceiver or w/Telematics Transceiver except GBOOK B

    B

    CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY) Click here

    A

  7. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY)


    1. Disconnect the I153 radio receiver assembly connector.

    2. Disconnect the T20 telephone microphone assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      I153-25 (SNS2) - T20-3 (SNS2) Always Below 1 Ω
      I153-25 (SNS2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - DCM [TELEMATICS TRANSCEIVER])


    1. Disconnect the I153 radio receiver assembly connector.

    2. Disconnect the I40 DCM (telematics transceiver) connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      I153-21 (MIN+) - I40-18 (MCO+) Always Below 1 Ω
      I153-22 (MIN-) - I40-19 (MCO-) Always Below 1 Ω
      I153-21 (MIN+) - Body ground Always 10 kΩ or higher
      I153-22 (MIN-) - Body ground Always 10 kΩ or higher
      I153-24 (SGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HARNESS AND CONNECTOR (DCM [TELEMATICS TRANSCEIVER] - TELEPHONE MICROPHONE ASSEMBLY)


    1. Disconnect the I40 DCM (telematics transceiver) connector.

    2. Disconnect the T20 telephone microphone assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      I40-33 (MCVD) - T20-1 (MACC) Always Below 1 Ω
      I40-34 (MCI+) - T20-2 (MCO+) Always Below 1 Ω
      I40-35 (MCI-) - T20-4 (MCO-) Always Below 1 Ω
      I40-33 (MCVD) - Body ground Always 10 kΩ or higher
      I40-34 (MCI+) - Body ground Always 10 kΩ or higher
      I40-35 (MCI-) - Body ground Always 10 kΩ or higher
      I40-32 (SGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK DCM (TELEMATICS TRANSCEIVER)


    1. B0057H2C37
      *a

      Component with harness connected

      (DCM [Telematics Transceiver])

      Remove the DCM (telematics transceiver) with the connector(s) still connected.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      I40-33 (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
      I40-32 (SGND) - Body ground Always Below 1 Ω
      I40-35 (MCI-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE DCM (TELEMATICS TRANSCEIVER) Click here

    OK

  11. CHECK TELEPHONE MICROPHONE ASSEMBLY (OUTPUT TO DCM [TELEMATICS TRANSCEIVER])

    B00593XC10
    *a

    Component with harness connected

    (Telephone Microphone Assembly)

    1. Check the output waveform.


      1. Remove the telephone microphone assembly with the connector(s) still connected.

        Click here

      2. Connect an oscilloscope to terminal T20-2 (MCO+) and T20-4 (MCO-).

      3. Turn the engine switch on (ACC).

      4. Sound is input to the telephone microphone assembly when the user is closer than 125 mm from the telephone microphone assembly sound holes in the No.1 microphone case.

      5. Check the signal waveform according to the condition(s) in the table below.

        Item Condition
        Measurement terminal T20-2 (MCO+) - T20-4 (MCO-)
        Tool setting 50 mV/DIV., 500 ms/DIV.
        Vehicle condition

        1. Engine switch on (ACC)

        2. Sound is input to the telephone microphone assembly when the user is closer than 125 mm from the telephone microphone assembly sound holes in the No.1 microphone case.
        OK
        The waveform is similar to that shown in the illustration.

        Tech Tips

        The oscilloscope waveform shown in the illustration is an example for reference only.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here

    OK

  12. CHECK DCM (TELEMATICS TRANSCEIVER) (OUTPUT TO RADIO RECEIVER ASSEMBLY)

    B0057QFC07
    *a

    Component with harness connected

    (DCM [Telematics Transceiver])

    1. Check the output waveform.


      1. Remove the DCM (telematics transceiver) with the connector(s) still connected.

        Click here

      2. Connect an oscilloscope to terminal I40-18 (MCO+) and I40-19 (MCO-).

      3. Turn the engine switch on (ACC).

      4. Sound is input to the telephone microphone assembly when the user is closer than 125 mm from the telephone microphone assembly sound holes in the No.1 microphone case.

      5. Check the signal waveform according to the condition(s) in the table below.

        Item Condition
        Measurement terminal I40-18 (MCO+) - I40-19 (MCO-)
        Tool setting 50 mV/DIV., 500 ms/DIV.
        Vehicle condition

        1. Engine switch on (ACC)

        2. Sound is input to the telephone microphone assembly when the user is closer than 125 mm from the telephone microphone assembly sound holes in the No.1 microphone case.
        OK
        The waveform is similar to that shown in the illustration.

        Tech Tips

        The oscilloscope waveform shown in the illustration is an example for reference only.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    NG

    REPLACE DCM (TELEMATICS TRANSCEIVER) Click here

  13. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY)


    1. Disconnect the I153 radio receiver assembly connector.

    2. Disconnect the T20 telephone microphone assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      I153-25 (SNS2) - T20-3 (SNS2) Always Below 1 Ω
      I153-23 (MACC) - T20-1 (MACC) Always Below 1 Ω
      I153-21 (MIN+) - T20-2 (MCO+) Always Below 1 Ω
      I153-22 (MIN-) - T20-4 (MCO-) Always Below 1 Ω
      I153-25 (SNS2) - Body ground Always 10 kΩ or higher
      I153-23 (MACC) - Body ground Always 10 kΩ or higher
      I153-21 (MIN+) - Body ground Always 10 kΩ or higher
      I153-22 (MIN-) - Body ground Always 10 kΩ or higher
      I153-24 (SGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. CHECK RADIO RECEIVER ASSEMBLY


    1. B005BBXC12
      *a

      Component with harness connected

      (Radio Receiver Assembly)

      Remove the radio receiver assembly with the connector(s) still connected.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      I153-23 (MACC) - 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
      I153-22 (MIN-) - Body ground Always Below 1 Ω
      I153-24 (SGND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    OK

  15. CHECK TELEPHONE MICROPHONE ASSEMBLY (OUTPUT TO RADIO RECEIVER ASSEMBLY)

    B00593XC15
    *a

    Component with harness connected

    (Telephone Microphone Assembly)

    1. Check the output waveform.


      1. Remove the telephone microphone assembly with the connector(s) still connected.

        Click here

      2. Connect an oscilloscope to terminal T20-2 (MCO+) and T20-4 (MCO-).

      3. Turn the engine switch on (ACC).

      4. Sound is input to the telephone microphone assembly when the user is closer than 125 mm from the telephone microphone assembly sound holes in the roof headlining holder cover.

      5. Check the signal waveform according to the condition(s) in the table below.

        Item Condition
        Measurement terminal T20-2 (MCO+) - T20-4 (MCO-)
        Tool setting 50 mV/DIV., 500 ms/DIV.
        Vehicle condition

        1. Engine switch on (ACC)

        2. Sound is input to the telephone microphone assembly when the user is closer than 125 mm from the telephone microphone assembly sound holes in the roof headlining holder cover.
        OK
        The waveform is similar to that shown in the illustration.

        Tech Tips

        The oscilloscope waveform shown in the illustration is an example for reference only.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    NG

    REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here