Air Conditioning System (For Automatic Air Conditioning System)

AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): TERMINALS OF ECU

TERMINALS OF ECU

1. CHECK AIR CONDITIONING AMPLIFIER





(a) Measure the voltage and resistance of the connectors.
HINT: Check from the rear of the connector while it is connected to the air conditioning amplifier.









HINT: *: for 2GR-FE





(b) Using an oscilloscope, check waveform 1.





HINT: *: Compressor and pulley for 2AZ-FE, Compressor and magnetic clutch for 2GR-FE.





(c) Using an oscilloscope, check waveform 2.





HINT: When the blower level is increased, the duty ratio changes accordingly.





(d) Using an oscilloscope, check waveform 3.





HINT: The waveform varies depending on the CAN communication signal.





(e) Using an oscilloscope, check waveform 4.





HINT: The waveform varies depending on the CAN communication signal.





(f) Using an oscilloscope, check waveform 5.





HINT: *: for 2GR-FE

2. CHECK AIR CONDITIONING CONTROL





(a) Measure the voltage and resistance of the connectors.