NAVIGATION SYSTEM Microphone Circuit between Microphone and Radio Receiver

DESCRIPTION



WIRING DIAGRAM

A001UHUE02

PROCEDURE


  1. CHECK MICROPHONE (OPERATION CHECK)


    1. A001SOS

      Enter the "Microphone Check" screen. Refer to Check Microphone in Operation Check.

      Click here

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

      OK
      Check result is normal.
      Result
      Result Proceed to
      OK A
      NG (w/o Manual (SOS) Switch) B
      NG (w/ Manual (SOS) Switch) C

    A

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    C

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

    B

  2. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the F125 radio and display receiver assembly connector.

    2. Disconnect the R2 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
      F125-6 (SNS2) - R2-1 (SNS2) Always Below 1 Ω
      F125-4 (MACC) - R2-9 (MACC) Always Below 1 Ω
      F125-5 (MIN+) - R2-8 (MCO+) Always Below 1 Ω
      F125-19 (MIN-) - R2-7 (MCO-) Always Below 1 Ω
      F125-6 (SNS2) - Body ground Always 10 kΩ or higher
      F125-4 (MACC) - Body ground Always 10 kΩ or higher
      F125-5 (MIN+) - Body ground Always 10 kΩ or higher
      F125-19 (MIN-) - Body ground Always 10 kΩ or higher
      F125-18 (SGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. Reconnect the F125 radio and display receiver assembly connector.

    2. Reconnect the R2 map light assembly (telephone microphone assembly) connector.

    3. A001T9AC02
      *a

      Component with harness connected

      (Radio and Display Receiver Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F125-4 (MACC) - Body ground Ignition switch 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
      F125-18 (SGND) - Body ground Always Below 1 Ω
      F125-19 (MIN-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

  4. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


    1. Remove the map light assembly (telephone microphone assembly).

      Click here

    2. A001THYC06
      *a

      Component without harness connected

      (Map Light Assembly (Telephone Microphone Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (SNS2) - 7 (MCO-) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) Click here

    OK

  5. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


    1. Reconnect the F125 radio and display receiver assembly connector.

    2. Reconnect the R2 map light assembly (telephone microphone assembly) connector.

    3. Turn the ignition switch to ACC.

    4. A001WF3C03
      *a

      Component with harness connected

      (Map Light Assembly (Telephone Microphone Assembly))

      Connect an oscilloscope to terminals 8 (MCO+) and 7 (MCO-) of the R2 map light assembly (telephone microphone assembly) connector.

    5. Check the waveform of the map light assembly (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

    A

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

    B

    REPLACE MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) Click here

  6. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the F125 radio and display receiver assembly connector.

    2. Disconnect the R2 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
      F125-6 (SNS2) - R2-1 (SNS2) Always Below 1 Ω
      F125-6 (SNS2) or R2-1 (SNS2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the F51 telematics transceiver connector.

    2. Disconnect the R2 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
      F51-33 (MCVD) - R2-9 (MACC) Always Below 1 Ω
      F51-34 (MCI+) - R2-8 (MCO+) Always Below 1 Ω
      F51-35 (MCI-) - R2-7 (MCO-) Always Below 1 Ω
      F51-33 (MCVD) or R2-9 (MACC) - Body ground Always 10 kΩ or higher
      F51-34 (MCI+) or R2-8 (MCO+) - Body ground Always 10 kΩ or higher
      F51-35 (MCI-) or R2-7 (MCO-) - Body ground Always 10 kΩ or higher
      F51-32 (SGND) - 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 AND DISPLAY RECEIVER ASSEMBLY - TELEMATICS TRANSCEIVER)


    1. Disconnect the F125 radio and display receiver assembly connector.

    2. Disconnect the F51 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F125-5 (MIN+) - F51-18 (MCO+) Always Below 1 Ω
      F125-19 (MIN-) - F51-19 (MCO-) Always Below 1 Ω
      F125-5 (MIN+) or F51-18 (MCO+) - Body ground Always 10 kΩ or higher
      F125-19 (MIN-) or F51-19 (MCO-) - Body ground Always 10 kΩ or higher
      F125-18 (SGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. Disconnect the F125 radio and display receiver assembly connector.

    2. Disconnect the F51 telematics transceiver connector.

    3. A001X96C46
      *a

      Component with harness connected

      (Radio and Display Receiver Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F125-18 (SGND) - Body ground Always Below 1 Ω
      F125-19 (MIN-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

  10. INSPECT TELEMATICS TRANSCEIVER


    1. Reconnect the F51 telematics transceiver connector.

    2. A001TGIC50
      *a

      Component with harness connected

      (Telematics Transceiver)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F51-33 (MCVD) - Body ground Ignition switch 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
      F51-32 (SGND) - Body ground Always Below 1 Ω
      F51-35 (MCI-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE TELEMATICS TRANSCEIVER Click here

    OK

  11. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


    1. Remove the map light assembly (telephone microphone assembly).

      Click here

    2. A001THYC05
      *a

      Component without harness connected

      (Map Light Assembly (Telephone Microphone Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (SNS2) - 7 (MCO-) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK
    NG

  12. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


    1. Reconnect the F125 radio and display receiver assembly connector.

    2. Reconnect the R2 map light assembly (telephone microphone assembly) connector.

    3. Reconnect the F51 telematics transceiver connector.

    4. Turn the ignition switch to ACC.

    5. A001WF3C02
      *a

      Component with harness connected

      (Map Light Assembly (Telephone Microphone Assembly))

      Connect an oscilloscope to terminals 8 (MCO+) and 7 (MCO-) of the R2 map light assembly (telephone microphone assembly) connector.

    6. Check the waveform of the map light assembly (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

    A

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

    B

    REPLACE MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) Click here