NAVIGATION SYSTEM 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

A003SHQE01

INSPECTION PROCEDURE

PROCEDURE


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


    1. Disconnect the E26 navigation receiver assembly connector.

    2. Disconnect the O8 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E26-5 (MACC) - O8-12 (MACC) Always Below 1 Ω
      E26-4 (MIN+) - O8-11 (MIC+) Always Below 1 Ω
      E26-13 (MIN-) - O8-10 (MIC-) Always Below 1 Ω
      E26-3 (SNS2) - Body ground Always Below 1 Ω
      E26-5 (MACC) - Body ground Always 10 kΩ or higher
      E26-4 (MIN+) - Body ground Always 10 kΩ or higher
      E26-13 (MIN-) - Body ground Always 10 kΩ or higher
      E26-14 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT NAVIGATION RECEIVER ASSEMBLY


    1. A003TR9E04
      Text in Illustration
      *a

      Component with harness connected

      (Navigation Receiver Assembly)

      Reconnect the E26 navigation receiver assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      E26-5 (MACC) - Body ground Power switch on (ACC) 4 to 6 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E26-14 (SGND) - Body ground Always Below 1 Ω
      E26-13 (MIN-) - Body ground Always Below 1 Ω

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    OK

  3. INSPECT MAP LIGHT ASSEMBLY


    1. Reconnect the E26 navigation receiver assembly connector.

    2. Reconnect the O8 map light assembly connector.

    3. Turn the power switch on (ACC).

    4. A003RHPE01
      Text in Illustration
      *a

      Component with harness connected

      (Map Light Assembly)

      Connect an oscilloscope to terminals 11 (MIC+) and 10 (MIC-) of the O8 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

  4. REPLACE TELEPHONE MICROPHONE ASSEMBLY


    1. Replace the telephone microphone assembly Click here.

    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 (TELEPHONE MICROPHONE ASSEMBLY WAS DEFECTIVE)