NAVIGATION SYSTEM Microphone Circuit between Microphone and Navigation Receiver Assembly

DESCRIPTION



WIRING DIAGRAM

B001MJ0E21

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 Navigation System Click here.

PROCEDURE


  1. CHECK MICROPHONE (OPERATION CHECK)


    1. B001MI8

      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.

    OK

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

    NG

  2. CONFIRM 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 (RADIO RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) Click here

    A

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


    1. Disconnect the H147 radio receiver assembly connector.

    2. Disconnect the T6 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
      H147-29 (MACC) - T6-14 (MACC) Always Below 1 Ω
      H147-27 (MIN+) - T6-13 (MCO+) Always Below 1 Ω
      H147-48 (MIN-) - T6-12 (MCO-) Always Below 1 Ω
      H147-49 (SNS2) - T6-11 (SNS2) Always Below 1 Ω
      H147-29 (MACC) - Body ground Always 10 kΩ or higher
      H147-27 (MIN+) - Body ground Always 10 kΩ or higher
      H147-48 (MIN-) - Body ground Always 10 kΩ or higher
      H147-28 (SGND) - Body ground Always 10 kΩ or higher
      H147-49 (SNS2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT RADIO RECEIVER ASSEMBLY


    1. B001LFEE02
      Text in Illustration
      *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
      H147-29 (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
      H147-28 (SGND) - Body ground Always Below 1 Ω
      H147-48 (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 MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) Click here

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


    1. Disconnect the H147 radio receiver assembly connector.

    2. Disconnect the T6 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
      H147-49 (SNS2) - T6-11 (SNS2) Always Below 1 Ω
      H147-49 (SNS2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the H147 radio receiver assembly connector.

    2. Disconnect the H145 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H147-27 (MIN+) - H145-18 (MCO+) Always Below 1 Ω
      H147-48 (MIN-) - H145-19 (MCO-) Always Below 1 Ω
      H147-27 (MIN+) - Body ground Always 10 kΩ or higher
      H147-48 (MIN-) - Body ground Always 10 kΩ or higher
      H147-28 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY))


    1. Disconnect the H145 telematics transceiver connector.

    2. Disconnect the T6 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
      H145-33 (MCVD) - T6-14 (MACC) Always Below 1 Ω
      H145-34 (MCI+) - T6-13 (MCO+) Always Below 1 Ω
      H145-35 (MCI-) - T6-12 (MCO-) Always Below 1 Ω
      H145-33 (MCVD) - Body ground Always 10 kΩ or higher
      H145-34 (MCI+) - Body ground Always 10 kΩ or higher
      H145-35 (MCI-) - Body ground Always 10 kΩ or higher
      H145-32 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT RADIO RECEIVER ASSEMBLY


    1. B001N7TE01
      Text in Illustration
      *a

      Component with harness connected

      (Radio Receiver Assembly)

      Disconnect the H145 telematics transceiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H147-28 (SGND) - Body ground Always Below 1 Ω
      H147-48 (MIN-) - Body ground Always Below 1 Ω

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    OK

  9. INSPECT TELEMATICS TRANSCEIVER


    1. B001N7LE01
      Text in Illustration
      *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
      H145-33 (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
      H145-35 (MCI-) - Body ground Always Below 1 Ω
      H145-32 (SGND) - Body ground Always Below 1 Ω

    NG

    REPLACE TELEMATICS TRANSCEIVER Click here

    OK

  10. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


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

    2. B001KULE17
      Text in Illustration
      *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
      11 (SNS2) - 12 (MCO-) Always Below 1 Ω

    NG

    REPLACE MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) Click here

    OK

  11. INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)


    1. Turn the power switch on (ACC).

    2. B001MPYE01
      Text in Illustration
      *a

      Component with harness connected

      (Map Light Assembly (Telephone Microphone Assembly))

      Connect an oscilloscope to terminals 13 (MCO+) and 12 (MCO-) of the T6 map light assembly (telephone microphone assembly) connector.

    3. 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

  12. 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 MAP LIGHT ASSEMBLY Click here