NAVIGATION SYSTEM (for HDD) Microphone Circuit between Microphone and Navigation Receiver Assembly

DESCRIPTION

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

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

WIRING DIAGRAM

A01J8LZE09

INSPECTION PROCEDURE

PROCEDURE


  1. 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 (NAVIGATION RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY)


    1. A01JBA5E03

      Disconnect the L109 navigation receiver assembly connector.

    2. A01JBA5E01

      Disconnect the U3 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L109-3 (SNS2) - U3-2 (SNS2) Always Below 1 Ω
      L109-5 (MACC) - U3-5 (MACC) Always Below 1 Ω
      L109-4 (MIN+) - U3-4 (MCO+) Always Below 1 Ω
      L109-13 (MIN-) - U3-3 (MCO-) Always Below 1 Ω
      L109-3 (SNS2) - Body ground Always 10 kΩ or higher
      L109-5 (MACC) - Body ground Always 10 kΩ or higher
      L109-4 (MIN+) - Body ground Always 10 kΩ or higher
      L109-13 (MIN-) - Body ground Always 10 kΩ or higher
      L109-14 (SGND) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Navigation Receiver Assembly)
      *2

      Front view of wire harness connector

      (to Map Light Assembly)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT NAVIGATION RECEIVER ASSEMBLY


    1. Disconnect the U3 map light assembly connector.

    2. A01JBH0E01
      Text in Illustration
      *1

      Component with harness connected

      (Navigation Receiver Assembly)

      Reconnect the L109 navigation receiver assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      L109-5 (MACC) - Body ground Power switch on (ACC) 4 to 6 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L109-14 (SGND) - Body ground Always Below 1 Ω
      L109-13 (MIN-) - Body ground Always Below 1 Ω

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    OK

  4. INSPECT MAP LIGHT ASSEMBLY


    1. A01JB2DE01
      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 L109 navigation receiver assembly connector.

    2. A01J8HTE01
      Text in Illustration
      *1

      Component with harness connected

      (Map Light Assembly)

      Reconnect the U3 map light assembly connector.

    3. Turn the power switch on (ACC).

    4. Connect an oscilloscope to terminals 4 (MCO+) and 3 (MCO-) of the U3 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 output A
      A waveform synchronized with the voice input to the map light 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 (NAVIGATION RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY)


    1. A01JBA5E03

      Disconnect the L109 navigation receiver assembly connector.

    2. A01JA3SE01

      Disconnect the U13 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L109-3 (SNS2) - U13-3 (SNS2) Always Below 1 Ω
      L109-5 (MACC) - U13-6 (MACC) Always Below 1 Ω
      L109-4 (MIN+) - U13-5 (MCO+) Always Below 1 Ω
      L109-13 (MIN-) - U13-4 (MCO-) Always Below 1 Ω
      L109-3 (SNS2) - Body ground Always 10 kΩ or higher
      L109-5 (MACC) - Body ground Always 10 kΩ or higher
      L109-4 (MIN+) - Body ground Always 10 kΩ or higher
      L109-13 (MIN-) - Body ground Always 10 kΩ or higher
      L109-14 (SGND) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Navigation Receiver Assembly)
      *2

      Front view of wire harness connector

      (to Map Light Assembly)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT NAVIGATION RECEIVER ASSEMBLY


    1. Disconnect the U13 map light assembly connector.

    2. A01JBH0E01
      Text in Illustration
      *1

      Component with harness connected

      (Navigation Receiver Assembly)

      Reconnect the L109 navigation receiver assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      L109-5 (MACC) - Body ground Power switch on (ACC) 4 to 6 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L109-14 (SGND) - Body ground Always Below 1 Ω
      L109-13 (MIN-) - Body ground Always Below 1 Ω

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    OK

  8. INSPECT MAP LIGHT ASSEMBLY


    1. A01JA18E01
      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

  9. INSPECT MAP LIGHT ASSEMBLY


    1. Reconnect the L109 navigation receiver assembly connector.

    2. A01J91AE01
      Text in Illustration
      *1

      Component with harness connected

      (Map Light Assembly)

      Reconnect the U13 map light assembly connector.

    3. Turn the power switch on (ACC).

    4. Connect an oscilloscope to terminals 5 (MCO+) and 4 (MCO-) of the U13 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 output A
      A waveform synchronized with the voice input to the map light 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

  10. 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