Eclipse Spyder GS L4-2350cc 2.4L SOHC MFI (2001)
Compressor Speed Sensor: Testing and Inspection
Troubleshooting Hints
TROUBLESHOOTING HINTS
When operating the air conditioning switch
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The air thermo sensor, which senses the temperature of the air flowing out of the evaporator, deactivates the compressor at 5 °C (41.0 °F) or
below.
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The dual pressure switch turns OFF when the refrigerant pressure becomes excessively high or low, thus protecting the compressor circuit. (See
Table below.)
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When the air thermo sensor is activated, the dual pressure switch is ON, and the ignition switch, blower switch, and air conditioning switch are
ON, the A/C compressor relay is energized.
When operating the air outlet changeover control knob
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When the air outlet changeover control knob is moved to DEFROSTER or DEFROSTER/FOOT position, the defroster switch, which is connected
in series to the air conditioning switch, is turned on. The other compressor control than the above is the same as that when operating the air
conditioning switch.
When compressor locks <vehicles with 3.0 L engine>
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Since the compressor and alternator are driven by the same belt, the electric generating function of the alternator also stops when the belt is
broken. In order to assure the electric generating function of the alternator, there is an A/C-ECU to prevent breaking of the belt due to slipping
when the compressor locks. The A/C-ECU makes a comparative calculation of the compressor revolutions and the engine revolutions which are
detected by the revolution pick-up sensor. When 70% or more slip ratio continues for 3 seconds or more, the A/C compressor relay goes from on
to off; at the same time, the operation display in the air conditioner switch blinks to announce an abnormality.
