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

DTC Code DTC Name
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

E280091E07

CAUTION / NOTICE / HINT

Note:

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

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PROCEDURE

  1. CHECK NAVIGATION RECEIVER ASSEMBLY

    1. E280108C07

      *a

      Component with harness connected

      (Navigation Receiver Assembly)

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G139-19 (MIN-) - Body ground

      Always

      Below 1 Ω

      G139-18 (SGND) - Body ground

      Always

      Below 1 Ω

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      G139-4 (MACC) - Body ground

      Engine switch on (ACC)

      4.75 to 5.25 V

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY

    Click here

    OK

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

    1. Disconnect the G139 navigation receiver assembly connector.

    2. Disconnect the Q7 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) - Q7-11 (MACC)

      Always

      Below 1 Ω

      G139-5 (MIN+) - Q7-10 (MCO+)

      Always

      Below 1 Ω

      G139-19 (MIN-) - Q7-9 (MCO-)

      Always

      Below 1 Ω

      G139-6 (SNS2) - Q7-12 (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

  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 MAP LIGHT ASSEMBLY

    Click here