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

INSPECTION PROCEDURE

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

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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