AUDIO AND VISUAL SYSTEM Microphone Circuit between Microphone and Radio Receiver

DESCRIPTION


WIRING DIAGRAM


  1. w/o Manual (SOS) Switch

    B001O01E83
    *a (Shielded)
    *b Roof Console Box Assembly
    *c Radio Receiver Assembly
    *d (Telephone Microphone Assembly)

  2. w/ Manual (SOS) Switch

    B001OOME04

CAUTION / NOTICE / HINT

Note


  • Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.

    Click here

PROCEDURE


  1. CHECK MICROPHONE (OPERATION CHECK)


    1. B001OFM

      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.

      Result
      Result Proceed to
      OK (w/o Manual (SOS) switch) A
      OK (w/ Manual (SOS) switch) B
      NG C

    B

    CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) Click here

    C

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    A

  2. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the H179 radio receiver assembly connector.

    2. Disconnect the T11 roof console box 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
      H179-4 (MACC) - T11-4 (MACC) Always Below 1 Ω
      H179-5 (MIN+) - T11-3 (MCO+) Always Below 1 Ω
      H179-19 (MIN-) - T11-2 (MCO-) Always Below 1 Ω
      H179-6 (SNS2) - T11-1 (SNS2) Always Below 1 Ω
      H179-4 (MACC) or T11-4 (MACC) - Body ground Always 10 kΩ or higher
      H179-5 (MIN+) or T11-3 (MCO+) - Body ground Always 10 kΩ or higher
      H179-19 (MIN-) or T11-2 (MCO-) - Body ground Always 10 kΩ or higher
      H179-18 (SGND) - Body ground Always 10 kΩ or higher
      H179-6 (SNS2) or T11-1 (SNS2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT RADIO RECEIVER ASSEMBLY


    1. B001O1IC01
      *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
      H179-4 (MACC) - Body ground Engine switch on (ACC) 4 to 6 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H179-18 (SGND) - Body ground Always Below 1 Ω
      H179-19 (MIN-) - Body ground Always Below 1 Ω

    3. Proceed to the next step based on the inspection result.

      Result
      Result Proceed to
      NG A
      OK B

    A

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    B

    INSPECT ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) Click here

  4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the H179 radio receiver assembly connector.

    2. Disconnect the T11 roof console box 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
      H179-6 (SNS2) - T11-1 (SNS2) Always Below 1 Ω
      H179-6 (SNS2) or T11-1 (SNS2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - TELEMATICS TRANSCEIVER


    1. Disconnect the H179 radio receiver assembly connector.

    2. Disconnect the H101 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H179-5 (MIN+) - H101-18 (MCO+) Always Below 1 Ω
      H179-19 (MIN-) - H101-19 (MCO-) Always Below 1 Ω
      H179-5 (MIN+) or H101-18 (MCO+) - Body ground Always 10 kΩ or higher
      H179-19 (MIN-) or H101-19 (MCO-) - Body ground Always 10 kΩ or higher
      H179-18 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the H101 telematics transceiver connector.

    2. Disconnect the T11 roof console box 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
      H101-33 (MCVD) - T11-4 (MACC) Always Below 1 Ω
      H101-34 (MCI+) - T11-3 (MCO+) Always Below 1 Ω
      H101-35 (MCI-) - T11-2 (MCO-) Always Below 1 Ω
      H101-33 (MCVD) or T11-4 (MACC) - Body ground Always 10 kΩ or higher
      H101-34 (MCI+) or T11-3 (MCO+) - Body ground Always 10 kΩ or higher
      H101-35 (MCI-) or T11-2 (MCO-) - Body ground Always 10 kΩ or higher
      H101-32 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT RADIO RECEIVER ASSEMBLY


    1. B001OH9C02
      *a

      Component with harness connected

      (Radio Receiver Assembly)

      Disconnect the H101 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H179-18 (SGND) - Body ground Always Below 1 Ω
      H179-19 (MIN-) - Body ground Always Below 1 Ω

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    OK

  8. INSPECT TELEMATICS TRANSCEIVER


    1. B001OLXC01
      *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
      H101-33 (MCVD) - Body ground Engine switch on (ACC) 4 to 6 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H101-35 (MCI-) - Body ground Always Below 1 Ω
      H101-32 (SGND) - Body ground Always Below 1 Ω

    NG

    REPLACE TELEMATICS TRANSCEIVER Click here

    OK

  9. INSPECT ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


    1. Remove the roof console box assembly (telephone microphone assembly) Click here.

    2. B001OAYC76
      *a

      Component without harness connected

      (Roof Console Box Assembly (Telephone Microphone Assembly))

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

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

    NG

    REPLACE TELEPHONE MICROPHONE ASSEMBLY Click here

    OK

  10. INSPECT ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


    1. Turn the engine switch on (ACC).

    2. B001O5PC01
      *a

      Component with harness connected

      (Roof Console Box Assembly (Telephone Microphone Assembly))

      Connect an oscilloscope to terminals 3 (MCO+) and 2 (MCO-) of the T11 roof console box assembly (telephone microphone assembly) connector.

    3. Check the waveform of the telephone microphone assembly using the oscilloscope.

      Result
      Result Proceed to
      A waveform synchronized with the voice input to the roof console box assembly (telephone microphone assembly) is output A
      A waveform synchronized with the voice input to the roof console box assembly (telephone microphone assembly) is not output B

    A

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

    B

  11. REPLACE 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.

      Result
      Result Proceed to

      Malfunction does not recur

      (returns to normal)

      		 A
      Malfunction recurs B

    A

    END

    B

    REPLACE ROOF CONSOLE BOX ASSEMBLY Click here