Operation CHARM: Car repair manuals for everyone.

Magnet Clutch Circuit

Magnet Clutch Circuit

SYMPTOM: Magnet clutch does not engage.

Inspection Flow:




INSPECTION FLOW

SYSTEM DESCRIPTION
Unified meter and A/C amp. controls compressor operation by ambient temperature and signal from ECM.




Low Temperature Protection Control
Unified meter and A/C amp. will turn the compressor ON or OFF as determined by a signal detected by intake sensor.

When intake air temperature is higher than 4 °C (39 °F), the compressor turns ON. The compressor turns OFF when intake air temperature is lower than 2.5 °C (37 °F).




Diagnostic Procedure For Magnetic Clutch (Steps 1 - 2):




Diagnostic Procedure For Magnetic Clutch (Steps 3 - 6):




Diagnostic Procedure For Magnetic Clutch (Steps 7 - 8):




Diagnostic Procedure For Magnetic Clutch (Steps 9 - 11):




Diagnostic Procedure For Magnetic Clutch (Step 12):




DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH
SYMPTOM: Magnet clutch does not engage when A/C switch is ON.

COMPONENT INSPECTION




Refrigerant Pressure Sensor
The refrigerant pressure sensor is attached to the condenser.