Magnet Clutch

* Automatic Air Conditioning System *
TROUBLE DIAGNOSIS PROCEDURE FOR MAGNET CLUTCH

Inspection Flow:

SYSTEM DESCRIPTION
Auto amplifier controls compressor operation by ambient temperature and signal from ECM.






Low Temperature Protection Control
Auto amplifier will turn the compressor "ON" or "OFF" as determined by a signal detected by ambient sensor.

When ambient temperatures are greater than 1 °C (34 °F), the compressor turns "ON". The compressor turns "OFF" when ambient temperatures are less than -2 °C (28 °F).



DIAGNOSTIC PROCEDURE

Step 1:

Step 2 - 4:

Step 5 - 7:

Step 8 - 9:

Step 10 - 11:

Step 12:

SYMPTOM:
* Magnet clutch does not engage when AUTO switch is ON.

A/C Relay:

ELECTRICAL COMPONENT INSPECTION

Refrigerant Pressure Sensor:

Refrigerant Pressure Sensor
Make sure that higher A/C refrigerant pressure results in higher refrigerant-pressure sensor output voltage.