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

DESCRIPTION

The radio receiver assembly and map light assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines.

Using this circuit, the radio receiver assembly sends power to the map light assembly (telephone microphone assembly), and the map light assembly (telephone microphone assembly) sends microphone signals to the radio receiver assembly.

WIRING DIAGRAM

A001OYCE01
*a (Shielded)
*b Map Light Assembly (Telephone Microphone Assembly)
*c Radio Receiver Assembly

PROCEDURE


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


    1. Disconnect the F47 radio 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
      F47-6 (SNS2) - R2-1 (SNS2) Always Below 1 Ω
      F47-4 (MACC) - R2-9 (MACC) Always Below 1 Ω
      F47-5 (MIN+) - R2-8 (MCO+) Always Below 1 Ω
      F47-19 (MIN-) - R2-7 (MCO-) Always Below 1 Ω
      F47-6 (SNS2) or R2-1 (SNS2) - Body ground Always 10 kΩ or higher
      F47-4 (MACC) or R2-9 (MACC) - Body ground Always 10 kΩ or higher
      F47-5 (MIN+) or R2-8 (MCO+) - Body ground Always 10 kΩ or higher
      F47-19 (MIN-) or R2-7 (MCO-) - Body ground Always 10 kΩ or higher
      F47-18 (SGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT RADIO RECEIVER ASSEMBLY


    1. Connect the F47 radio receiver assembly connector.

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

    3. A001OFYC01
      *a

      Component with harness connected

      (Radio Receiver Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F47-4 (MACC) - Body ground power switch on (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
      F47-18 (SGND) - Body ground Always Below 1 Ω
      F47-19 (MIN-) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    OK

  3. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


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

      Click here

    2. A001RIBC01
      *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

  4. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


    1. Connect the R2 map light assembly (telephone microphone assembly) connector.

    2. Turn the power switch on (ACC).

    3. A005NH0C01
      *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.

    4. 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