Air Conditioning System (for Automatic Air Conditioning System)

AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): 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
*1: for 2GR-FE

*2: for 2AR-FE

(b) Using an oscilloscope, check waveform 1.









HINT
*: Compressor and pulley for 2AR-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 (for TMMC Made)





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





3. CHECK AIR CONDITIONING CONTROL (for TMC Made)





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