NAVIGATION SYSTEM Microphone Circuit between Microphone and Navigation Receiver Assembly

DESCRIPTION

w/o Manual (SOS) Switch:

The navigation receiver assembly and roof console box assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines.

Using this circuit, the navigation receiver assembly sends power to the roof console box assembly (telephone microphone assembly), and the roof console box assembly (telephone microphone assembly) sends microphone signals to the navigation receiver assembly.

w/ Manual (SOS) Switch:

The navigation receiver assembly and roof console box assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines.

Using this circuit, the DCM (telematics transceiver) sends power to the roof console box assembly (telephone microphone assembly), and the roof console box assembly (telephone microphone assembly) sends microphone signals to the navigation receiver assembly via the DCM (telematics transceiver).

WIRING DIAGRAM

A01I2ZJE09

INSPECTION PROCEDURE

Note

If the DCM (telematics transceiver) has been replaced, perform the DCM Activation procedure using the Techstream (w/ Manual (SOS) Switch) Click here.

PROCEDURE


  1. CHECK MICROPHONE (OPERATION CHECK)


    1. A01I5QN

      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.

    NG

    CHECK MODEL Click here

    OK

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

  2. CHECK MODEL


    1. Choose the model to be inspected.

      Result
      Model Proceed to
      w/o Manual (SOS) switch A
      w/ Manual (SOS) switch B

    B

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

    A

  3. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the I74 navigation receiver assembly connector.

    2. Disconnect the S12 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
      I74-4 (MACC) - S12-14 (MACC) Always Below 1 Ω
      I74-5 (MIN+) - S12-13 (MCO+) Always Below 1 Ω
      I74-19 (MIN-) - S12-12 (MCO-) Always Below 1 Ω
      I74-6 (SNS2) - S12-15 (SNS2) Always Below 1 Ω
      I74-4 (MACC) - Body ground Always 10 kΩ or higher
      I74-5 (MIN+) - Body ground Always 10 kΩ or higher
      I74-19 (MIN-) - Body ground Always 10 kΩ or higher
      I74-18 (SGND) - Body ground Always 10 kΩ or higher
      I74-6 (SNS2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT NAVIGATION RECEIVER ASSEMBLY


    1. A01I4CIE07
      Text in Illustration
      *a

      Component with harness connected

      (Navigation Receiver Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      I74-4 (MACC) - Body ground Power 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
      I74-18 (SGND) - Body ground Always Below 1 Ω
      I74-19 (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

    B

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

    A

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

  5. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - ROOF CONSOLE BOX ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the I74 navigation receiver assembly connector.

    2. Disconnect the S12 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
      I74-6 (SNS2) - S12-15 (SNS2) Always Below 1 Ω
      I74-6 (SNS2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER))


    1. Disconnect the I74 navigation receiver assembly connector.

    2. Disconnect the I135 DCM (telematics transceiver) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I74-5 (MIN+) - I135-18 (MCO+) Always Below 1 Ω
      I74-19 (MIN-) - I135-19 (MCO-) Always Below 1 Ω
      I74-5 (MIN+) - Body ground Always 10 kΩ or higher
      I74-19 (MIN-) - Body ground Always 10 kΩ or higher
      I74-18 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the I135 DCM (telematics transceiver) connector.

    2. Disconnect the S12 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
      I135-33 (MCVD) - S12-14 (MACC) Always Below 1 Ω
      I135-34 (MCI+) - S12-13 (MCO+) Always Below 1 Ω
      I135-35 (MCI-) - S12-12 (MCO-) Always Below 1 Ω
      I135-33 (MCVD) - Body ground Always 10 kΩ or higher
      I135-34 (MCI+) - Body ground Always 10 kΩ or higher
      I135-35 (MCI-) - Body ground Always 10 kΩ or higher
      I135-32 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT NAVIGATION RECEIVER ASSEMBLY


    1. A01I4CIE08
      Text in Illustration
      *a

      Component with harness connected

      (Navigation Receiver Assembly)

      Disconnect the I135 DCM (telematics transceiver) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I74-18 (SGND) - Body ground Always Below 1 Ω
      I74-19 (MIN-) - Body ground Always Below 1 Ω

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    OK

  9. INSPECT DCM (TELEMATICS TRANSCEIVER)


    1. A01I3WGE57
      Text in Illustration
      *a

      Component with harness connected

      (DCM (Telematics Transceiver))

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      I135-33 (MCVD) - Body ground Power 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
      I135-35 (MCI-) - Body ground Always Below 1 Ω
      I135-32 (SGND) - Body ground Always Below 1 Ω

    NG

    REPLACE DCM (TELEMATICS TRANSCEIVER) Click here

    OK

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


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

    2. A01I5W0E59
      Text in Illustration
      *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
      15 (SNS2) - 12 (MCO-) Always Below 1 Ω

    NG

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

    OK

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


    1. Turn the power switch on (ACC).

    2. A01I40EE18
      Text in Illustration
      *a

      Component with harness connected

      (Roof Console Box Assembly (Telephone Microphone Assembly))

      Connect an oscilloscope to terminals 13 (MCO+) and 12 (MCO-) of the S12 roof console box assembly (telephone microphone assembly) connector.

    3. Check the waveform of the roof console box assembly (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

    B

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

    A

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