Magnet Clutch Circuit

* Automatic Air Conditioning System *

Inspection Flow (Without Navigation System):

Inspection Flow (With Navigation System):

TROUBLE DIAGNOSIS PROCEDURE FOR MAGNET CLUTCH

Magnet Clutch / Auto A/C:

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 -2 °C (28 °F), the compressor turns "ON". The compressor turns "OFF" when ambient temperatures are less than -5 °C (23 °F).

Step 1:

Step 2 - 4:

Step 5 - 6:

Step 7 - 9:

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

COMPONENT INSPECTION

A/C Relay:

Refrigerant Pressure Sensor:

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

Refer to "Diagnostic Procedure".