AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) Generator Signal Circuit

DESCRIPTION

When the engine is started, the generator assembly turns and pulsed voltage signal is generated.

This signal is used by the air conditioning amplifier assembly.

The signal expressing the amount of output from the generator assembly is one element of PTC heater control.

WIRING DIAGRAM

A003AT1E17

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - GENERATOR)


    1. A003E7OE01
      Text in Illustration
      *1

      Rear view of wire harness connector

      (to Air Conditioning Amplifier Assembly)
      *2

      Front view of wire harness connector

      (to Generator Assembly)

      Disconnect the D47 amplifier connector.

    2. Disconnect the B16 generator connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D47-25 (ALT) - B16-3 (M) Always Below 1 Ω
      D47-25 (ALT) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT GENERATOR ASSEMBLY


    1. for 1AD-FTV:

      Inspect the generator assembly Click here.

    2. for 2AD-FHV:

      Inspect the generator assembly Click here.

    3. for 2AD-FTV:

      Inspect the generator assembly Click here.

      Result
      Result Proceed to
      OK A
      NG (for 1AD-FTV) B
      NG (for 2AD-FHV) C
      NG (for 2AD-FTV) D

    B

    REPLACE GENERATOR ASSEMBLY Click here

    C

    REPLACE GENERATOR ASSEMBLY Click here

    D

    REPLACE GENERATOR ASSEMBLY Click here

    A

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