Magnet Clutch Circuit
Magnet Clutch CircuitSYMPTOM: Magnet clutch does not engage.
Inspection Flow:
INSPECTION FLOW
SYSTEM DESCRIPTION
Unified meter and A/C amp. controls compressor operation by ambient temperature, intake air 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 ambient sensor and intake sensor.
When ambient temperature is higher than 2 °C (28 °F), the compressor turns ON. The compressor turns OFF when ambient temperature is lower than -5 °C (23 °F).
When intake air temperature is higher than 1 °C (34 °F), the compressor turns ON. The compressor turns OFF when intake air temperature is lower than -5 °C (23 °F).
Diagnostic Procedure For Magnet Clutch (Steps 1 - 4):
Diagnostic Procedure For Magnet Clutch (Steps 5 - 7):
Diagnostic Procedure For Magnet Clutch (Steps 8 - 10):
Diagnostic Procedure For Magnet Clutch (Steps 11 - 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. Make sure that the A/C refrigerant pressure and the sensor output voltage are within the specified range as shown in the A/C operating condition figure. Refer to "REFRIGERANT PRESSURE SENSOR" (VQ35DE) or "REFRIGERANT PRESSURE SENSOR" (VK45DE). Testing and Inspection