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

DESCRIPTION

When the engine is started, the generator assembly turns on and a voltage pulse 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

B001E2LE29

PROCEDURE


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


    1. Disconnect the G25 amplifier connector.

    2. Disconnect the D3*1 or C65*2 generator connector.


      • *1: for 1GR-FE

      • *2: for 1KD-FTV

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

      Standard Resistance
      for 1GR-FE
      Tester Connection Condition Specified Condition
      G25-25 (ALT) - D3-3 (M) Always Below 1 Ω
      G25-25 (ALT) - Body ground Always 10 kΩ or higher
      for 1KD-FTV
      Tester Connection Condition Specified Condition
      G25-25 (ALT) - C65-3 (M) Always Below 1 Ω
      G25-25 (ALT) - Body ground Always 10 kΩ or higher

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR