AUDIO AND VISUAL SYSTEM Microphone Circuit between Microphone and Radio Receiver

DESCRIPTION

This circuit sends the microphone signal from the map light assembly (telephone microphone assembly) to the radio receiver assembly.

It also supplies power source from the radio receiver assembly to the map light assembly (telephone microphone assembly).

WIRING DIAGRAM

A01JBK5E01

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT RADIO RECEIVER ASSEMBLY


    1. A01JCNNE11
      Text in Illustration
      *1

      Component without harness connected

      (Radio Receiver Assembly)

      Disconnect the radio receiver assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      L45-3 (MACC) - Body ground Power switch on (IG) 4 to 6 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L45-6 (SGND) - Body ground Always Below 1 Ω
      L45-5 (MIN-) - Body ground Always Below 1 Ω

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    OK

  2. CONFIRM MODEL


    1. Choose the model to be inspected.

      Result
      Model Proceed to
      w/o Sliding Roof A
      w/ Sliding Roof B

    B

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

    A

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


    1. A01J8QOE13

      Disconnect the radio receiver assembly connector.

    2. A01JBA5E02

      Disconnect the map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L45-1 (SNS2) - U3-2 (SNS2) Always Below 1 Ω
      L45-3 (MACC) - U3-5 (MACC) Always Below 1 Ω
      L45-2 (MIN+) - U3-4 (MCO+) Always Below 1 Ω
      L45-5 (MIN-) - U3-3 (MCO-) Always Below 1 Ω
      L45-1 (SNS2) - Body ground Always 10 kΩ or higher
      L45-3 (MACC) - Body ground Always 10 kΩ or higher
      L45-2 (MIN+) - Body ground Always 10 kΩ or higher
      L45-5 (MIN-) - Body ground Always 10 kΩ or higher
      L45-6 (SGND) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Radio Receiver Assembly)
      *2

      Front view of wire harness connector

      (to Map Light Assembly)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT MAP LIGHT ASSEMBLY


    1. A01JB2DE02
      Text in Illustration
      *1

      Component without harness connected

      (Map Light Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      U3-2 (SNS2) - U3-3 (MCO-) Always Below 1 Ω

    NG

    REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here

    OK

  5. INSPECT MAP LIGHT ASSEMBLY


    1. Reconnect the radio receiver assembly connector.

    2. A01J8HTE02
      Text in Illustration
      *1

      Component with harness connected

      (Map Light Assembly)

      Reconnect the map light assembly connector.

    3. Turn the power switch on (ACC).

    4. Connect an oscilloscope to terminals U3-4 (MCO+) and U3-3 (MCO-) of the map light assembly connector.

    5. Check the waveform of the telephone microphone assembly using an oscilloscope.

      Result
      Result Proceed to
      A waveform synchronized with the voice input to the telephone microphone assembly is output A
      A waveform synchronized with the voice input to the telephone microphone assembly is not output B

    B

    REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here

    A

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

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


    1. A01J8QOE13

      Disconnect the radio receiver assembly connector.

    2. A01JA3SE02

      Disconnect the map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L45-1 (SNS2) - U13-3 (SNS2) Always Below 1 Ω
      L45-3 (MACC) - U13-6 (MACC) Always Below 1 Ω
      L45-2 (MIN+) - U13-5 (MCO+) Always Below 1 Ω
      L45-5 (MIN-) - U13-4 (MCO-) Always Below 1 Ω
      L45-1 (SNS2) - Body ground Always 10 kΩ or higher
      L45-3 (MACC) - Body ground Always 10 kΩ or higher
      L45-2 (MIN+) - Body ground Always 10 kΩ or higher
      L45-5 (MIN-) - Body ground Always 10 kΩ or higher
      L45-6 (SGND) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Radio Receiver Assembly)
      *2

      Front view of wire harness connector

      (to Map Light Assembly)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT MAP LIGHT ASSEMBLY


    1. A01JA18E02
      Text in Illustration
      *1

      Component without harness connected

      (Map Light Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      U13-3 (SNS2) - U13-4 (MCO-) Always Below 1 Ω

    NG

    REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here

    OK

  8. INSPECT MAP LIGHT ASSEMBLY


    1. Reconnect the radio receiver assembly connector.

    2. A01J91AE02
      Text in Illustration
      *1

      Component with harness connected

      (Map Light Assembly)

      Reconnect the map light assembly connector.

    3. Turn the power switch on (ACC).

    4. Connect an oscilloscope to terminals U13-5 (MCO+) and U13-4 (MCO-) of the map light assembly connector.

    5. Check the waveform of the telephone microphone assembly using an oscilloscope.

      Result
      Result Proceed to
      A waveform synchronized with the voice input to the telephone microphone assembly is output A
      A waveform synchronized with the voice input to the telephone microphone assembly is not output B

    B

    REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here

    A

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

  9. REPLACE TELEPHONE MICROPHONE ASSEMBLY


    1. Replace the telephone microphone assembly .

      Tech Tips


    2. Check if the same malfunction recurs.

      Result
      Result Proceed to

      Malfunction does not recur

      (returns to normal)

      		 A
      Malfunction recurs B

    B

    REPLACE MAP LIGHT ASSEMBLY Click here

    A

    END