NAVIGATION SYSTEM Microphone Circuit

DESCRIPTION

w/ Telematics Transceiver (except ERA-GLONASS):


w/o Telematics Transceiver or w/ Telematics Transceiver (for ERA-GLONASS):


WIRING DIAGRAM

B006FUQE18
w/ Telematics Transceiver (except ERA-GLONASS)
*a Telephone Microphone Assembly
*b DCM (Telematics Transceiver)
*c Radio Receiver Assembly
*d Navigation ECU
B006B56E09
w/o Telematics Transceiver or w/ Telematics Transceiver (for ERA-GLONASS)
*a Telephone Microphone Assembly
*b Radio Receiver Assembly
*c Navigation ECU

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. B006AGX

      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. B006AGX

      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. B006GMX

      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. B006GMX

      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 (except ERA-GLONASS) A
      w/o Telematics Transceiver or w/ Telematics Transceiver (for ERA-GLONASS) 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 G54 radio receiver assembly connector.

    2. Disconnect the N15 telephone microphone assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G54-25 (SNS2) - N15-3 (SNS2) Always Below 1 Ω
      G54-25 (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 G54 radio 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
      G54-21 (MIN+) - G56-18 (MCO+) Always Below 1 Ω
      G54-22 (MIN-) - G56-19 (MCO-) Always Below 1 Ω
      G54-21 (MIN+) - Body ground Always 10 kΩ or higher
      G54-22 (MIN-) - Body ground Always 10 kΩ or higher
      G54-24 (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 G56 DCM (telematics transceiver) connector.

    2. Disconnect the N15 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) - N15-1 (MACC) Always Below 1 Ω
      G56-34 (MCI+) - N15-2 (MCO+) Always Below 1 Ω
      G56-35 (MCI-) - N15-4 (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
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK DCM (TELEMATICS TRANSCEIVER)


    1. B006EB0C46
      *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
      G56-33 (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
      G56-32 (SGND) - Body ground Always Below 1 Ω
      G56-35 (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])

    B006BAAC28
    *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 N15-2 (MCO+) and N15-4 (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 microphone case LH.

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

        Item Condition
        Measurement terminal N15-2 (MCO+) - N15-4 (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 microphone case LH.
        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)

    B006ERZC16
    *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 G56-18 (MCO+) and G56-19 (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 microphone case LH.

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

        Item Condition
        Measurement terminal G56-18 (MCO+) - G56-19 (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 microphone case LH.
        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 G54 radio receiver assembly connector.

    2. Disconnect the N15 telephone microphone assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G54-25 (SNS2) - N15-3 (SNS2) Always Below 1 Ω
      G54-23 (MACC) - N15-1 (MACC) Always Below 1 Ω
      G54-21 (MIN+) - N15-2 (MCO+) Always Below 1 Ω
      G54-22 (MIN-) - N15-4 (MCO-) Always Below 1 Ω
      G54-25 (SNS2) - Body ground Always 10 kΩ or higher
      G54-23 (MACC) - Body ground Always 10 kΩ or higher
      G54-21 (MIN+) - Body ground Always 10 kΩ or higher
      G54-22 (MIN-) - Body ground Always 10 kΩ or higher
      G54-24 (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. B006ALYC19
      *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
      G54-23 (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
      G54-22 (MIN-) - Body ground Always Below 1 Ω
      G54-24 (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)

    B006BAAC29
    *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 N15-2 (MCO+) and N15-4 (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 microphone case LH*1 or microphone case RH*2.


        • *1: for LHD

        • *2: for RHD

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

        Item Condition
        Measurement terminal N15-2 (MCO+) - N15-4 (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 microphone case LH*1 or microphone case RH*2.

        *1: for LHD

        *2: for RHD

        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