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

DESCRIPTION

This circuit sends a microphone signal from the telephone microphone assembly to the navigation receiver assembly.

It also supplies power from the navigation receiver assembly to the telephone microphone assembly.

WIRING DIAGRAM

A01VA4IE01
*a Shielded
*b Telephone Microphone Assembly
*c Navigation Receiver Assembly
*d Map Light Assembly

CAUTION / NOTICE / HINT

Note

Check that the wire harness is properly installed and does not have any sharp bends, pinching or loose connections.

Click here

PROCEDURE


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


    1. Disconnect the G139 navigation receiver assembly connector.

    2. Disconnect the Q16 map light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G139-4 (MACC) - Q16-3 (MACC) Always Below 1 Ω
      G139-5 (MIN+) - Q16-4 (MCO+) Always Below 1 Ω
      G139-19 (MIN-) - Q16-6 (MCO-) Always Below 1 Ω
      G139-6 (SNS2) - Q16-5 (SNS2) Always Below 1 Ω
      G139-4 (MACC) - Body ground Always 10 kΩ or higher
      G139-5 (MIN+) - Body ground Always 10 kΩ or higher
      G139-19 (MIN-) - Body ground Always 10 kΩ or higher
      G139-18 (SGND) - Body ground Always 10 kΩ or higher
      G139-6 (SNS2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT MAP LIGHT ASSEMBLY


    1. Remove the map light assembly.

      Click here

    2. Remove the telephone microphone assembly.

      Click here

    3. A01VAQAC02
      *a

      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
      A-3 (MACC) - B-5 (MACC) Always Below 1 Ω
      A-4 (MCO+) - B-3 (MIC+) Always Below 1 Ω
      A-5 (SNS2) - B-1 (SNS2) Always Below 1 Ω
      A-6 (MCO-) - B-2 (MIC-) Always Below 1 Ω
      A-3 (MACC) - A-4 (MCO+) Always 10 kΩ or higher
      A-3 (MACC) - A-5 (SNS2) Always 10 kΩ or higher
      A-3 (MACC) - A-6 (MCO-) Always 10 kΩ or higher
      A-4 (MCO+) - A-5 (SNS2) Always 10 kΩ or higher
      A-4 (MCO+) - A-6 (MCO-) Always 10 kΩ or higher
      A-5 (SNS2) - A-6 (MCO-) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MAP LIGHT ASSEMBLY Click here

    OK

  3. CHECK TELEPHONE MICROPHONE ASSEMBLY


    1. Replace the telephone microphone assembly with a known good.

      Click here

    2. Check if the same problem occurs again.

      OK
      Malfunction disappears.
      Result
      Proceed to
      OK
      NG

    OK

    END (TELEPHONE MICROPHONE ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here