AUDIO AND VISUAL SYSTEM Microphone Circuit between Microphone and Radio Receiver

DESCRIPTION


WIRING DIAGRAM

A01WR7AE30

PROCEDURE


  1. CONFIRM MODEL


    1. Choose the model to be inspected.

      Result
      Result Proceed to
      w/o Telematics Transceiver A
      w/ Telematics Transceiver B

    B

    CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY)


    1. Disconnect the F76 multi-media module receiver assembly connector.

    2. Disconnect the R7 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F76-49 (SNS2) - R7-31 (SNS2) Always Below 1 Ω
      F76-29 (MACC) - R7-22 (ACC) Always Below 1 Ω
      F76-27 (MIN+) - R7-21 (MI1+) Always Below 1 Ω
      F76-48 (MIN-) - R7-20 (MIC-) Always Below 1 Ω
      F76-49 (SNS2) or R7-31 (SNS2) - Body ground Always 10 kΩ or higher
      F76-29 (MACC) or R7-22 (ACC) - Body ground Always 10 kΩ or higher
      F76-27 (MIN+) or R7-21 (MI1+) - Body ground Always 10 kΩ or higher
      F76-48 (MIN-) or R7-20 (MIC-) - Body ground Always 10 kΩ or higher
      F76-28 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK MULTI-MEDIA MODULE RECEIVER ASSEMBLY


    1. A01WVUGE02
      Text in Illustration
      *a

      Component with harness connected

      (Multi-media Module Receiver Assembly)

      Reconnect the multi-media module receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F76-28 (SGND) - Body ground Always Below 1 Ω
      F76-48 (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
      F76-29 (MACC) - Body ground Engine switch on (ACC) 4 to 6 V

    NG

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

    OK

  4. INSPECT MAP LIGHT ASSEMBLY


    1. B001903E23

      Remove the map light assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      20 (MIC-) - 31 (SNS2) Always Below 1 Ω

    NG

    CHECK TELEPHONE MICROPHONE ASSEMBLY Click here

    OK

  5. CHECK MAP LIGHT ASSEMBLY


    1. A01WTOTE02
      Text in Illustration
      *a

      Component with harness connected

      (Map Light Assembly)

      Reconnect the multi-media module receiver assembly connector.

    2. Reconnect the map light assembly connector.

    3. Turn the engine switch on (ACC).

    4. Connect an oscilloscope to terminals R7-21 (MI1+) and R7-20 (MIC-) of the map light assembly connector.

    5. 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

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

    A

  6. CHECK TELEPHONE MICROPHONE ASSEMBLY


    1. Replace the telephone microphone assembly with a new or known good one Click here.

    2. Check if the same malfunction recurs.

      OK
      Malfunction does not recur (returns to normal).

    OK

    END (TELEPHONE MICROPHONE ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here

  7. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY)


    1. Disconnect the F76 multi-media module receiver assembly connector.

    2. Disconnect the R7 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F76-49 (SNS2) - R7-31 (SNS2) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - DCM [TELEMATICS TRANSCEIVER])


    1. Disconnect the F76 multi-media module receiver assembly connector.

    2. Disconnect the P2 DCM (telematics transceiver) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F76-27 (MIN+) - P2-18 (MCO+) Always Below 1 Ω
      F76-48 (MIN-) - P2-19 (MCO-) Always Below 1 Ω
      F76-27 (MIN+) or P2-18 (MCO+) - Body ground Always 10 kΩ or higher
      F76-48 (MIN-) or P2-19 (MCO-) - Body ground Always 10 kΩ or higher
      F76-28 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HARNESS AND CONNECTOR (DCM [TELEMATICS TRANSCEIVER] - MAP LIGHT ASSEMBLY)


    1. Disconnect the P2 DCM (telematics transceiver) connector.

    2. Disconnect the R7 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P2-33 (MCVD) - R7-22 (ACC) Always Below 1 Ω
      P2-34 (MCI+) - R7-21 (MI1+) Always Below 1 Ω
      P2-35 (MCI-) - R7-20 (MIC-) Always Below 1 Ω
      P2-33 (MCVD) or R7-22 (ACC) - Body ground Always 10 kΩ or higher
      P2-34 (MCI+) or R7-21 (MI1+) - Body ground Always 10 kΩ or higher
      P2-35 (MCI-) or R7-20 (MIC-) - Body ground Always 10 kΩ or higher
      P2-32 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK MULTI-MEDIA MODULE RECEIVER ASSEMBLY


    1. A01WTUGE02
      Text in Illustration
      *a

      Component with harness connected

      (Multi-media Module Receiver Assembly)

      Reconnect the multi-media module receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F76-28 (SGND) - Body ground Always Below 1 Ω
      F76-48 (MIN-) - Body ground Always Below 1 Ω

    NG

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

    OK

  11. CHECK DCM (TELEMATICS TRANSCEIVER)


    1. A01WQTOE02
      Text in Illustration
      *a

      Component with harness connected

      (DCM [Telematics Transceiver])

      Reconnect the DCM (telematics transceiver) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P2-32 (SGND) - Body ground Always Below 1 Ω
      P2-35 (MCI-) - 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
      P2-33 (MCVD) - Body ground Engine switch on (ACC) 4 to 6 V

    NG

    REPLACE DCM (TELEMATICS TRANSCEIVER) Click here

    OK

  12. INSPECT MAP LIGHT ASSEMBLY


    1. B001903E23

      Remove the map light assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      20 (MIC-) - 31 (SNS2) Always Below 1 Ω

    NG

    CHECK TELEPHONE MICROPHONE ASSEMBLY Click here

    OK

  13. CHECK MAP LIGHT ASSEMBLY


    1. A01WTOTE02
      Text in Illustration
      *a

      Component with harness connected

      (Map Light Assembly)

      Reconnect the multi-media module receiver assembly connector.

    2. Reconnect the DCM (telematics transceiver) connector.

    3. Reconnect the map light assembly connector.

    4. Turn the engine switch on (ACC).

    5. Connect an oscilloscope to terminals R7-21 (MI1+) and R7-20 (MIC-) of the map light assembly connector.

    6. 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

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

    A

  14. CHECK TELEPHONE MICROPHONE ASSEMBLY


    1. Replace the telephone microphone assembly with a new or known good one Click here.

    2. Check if the same malfunction recurs.

      OK
      Malfunction does not recur (returns to normal).

    OK

    END (TELEPHONE MICROPHONE ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here