AUDIO AND VISUAL SYSTEM(for Radio and Display Type) Microphone Circuit between Microphone and Radio Receiver

DESCRIPTION


WIRING DIAGRAM

B003LPWE01

PROCEDURE


  1. CHECK MICROPHONE (OPERATION CHECK)


    1. B003RRI

      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.

    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

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    NG

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


    1. Disconnect the G100 radio and display receiver assembly connector.

    2. Disconnect the Q2 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
      G100-4 (MACC) - Q2-15 (MACC) Always Below 1 Ω
      G100-5 (MIN+) - Q2-14 (MCO+) Always Below 1 Ω
      G100-19 (MIN-) - Q2-13 (MCO-) Always Below 1 Ω
      G100-18 (SGND) - Body ground Always 10 kΩ or higher
      G100-4 (MACC) or Q2-15 (MACC) - Body ground Always 10 kΩ or higher
      G100-5 (MIN+) or Q2-14 (MCO+) - Body ground Always 10 kΩ or higher
      G100-19 (MIN-) or Q2-13 (MCO-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. B003QQVC04
      *a

      Component with harness connected

      (Radio and Display Receiver Assembly)

      Remove the radio and display receiver assembly with the connector still connected.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G100-19 (MIN-) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G100-4 (MACC) - Body ground Ignition switch ACC 4 to 6 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

  4. CHECK MAP LIGHT ASSEMBLY


    1. B003L3KC01
      *a

      Component with harness connected

      (Map Light Assembly)

      Reconnect the map light assembly with the connector still connected.

    2. Turn the ignition switch ACC.

    3. Connect an oscilloscope to terminals Q2-14 (MCO+) and Q2-13 (MCO-) of the map light assembly connector.

    4. 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 not output. A
      A waveform synchronized with the voice input to the map light assembly is output. B

    B

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    A

  5. CHECK TELEPHONE MICROPHONE ASSEMBLY


    1. Replace the telephone microphone assembly.

      Click here

    2. Check if the same malfunction recurs.

      OK
      Malfunction does not recur (returns to normal).
      Result
      Proceed to
      OK
      NG

    OK

    END (TELEPHONE MICROPHONE ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here