AC–11
AIR CONDITIONING
–
COMPRESSORAND MAGNETIC CLUTCH
COMPRESSOR AND MAGNETIC
CLUTCH
AC1GA–05
ON–VEHICLE INSPECTION
1.
INSPECT COMPRESSOR FOR METALLIC SOUND
Check there is abnormal metallic sound from the compressor
when the A/C switch is ON.
If abnormal metallic sound is heard, replace the compressoras-
sembly.
2.
INSPECT REFRIGERANT PRESSURE (See page
AC–1)
3.
INSPECT VISUALLY FOR LEAKAGE OF REFRIGER-
ANT
Using a gas leak detector, check for leakage of refrigerant.
If there is any leakage, replace the compressor assembly.
4.
INSPECT COMPRESSOR LOCK SENSOR RESIS-
TANCE
2
(a) Disconnect the connector.
(b) Measure resistance between terminals 1 and 2 .
Standard resistance:
1
165 – 205 Ω at 20 °C (68 °F)
If resistance is not as specified, replace the sensor.
5.
6.
7.
CHECK FOR LEAKAGE OF GREASE FROM CLUTCH
BEARING
CHECK FOR SIGNS OF OIL ON PRESSURE PLATE OR
ROTOR
I12997
INSPECT MAGNETIC CLUTCH BEARING FOR NOISE
(a) Start engine.
(b) Check for abnormal noise from the compressor when the
A/C switch is OFF.
If abnormal noise is being emitted, replace the magnetic clutch.
8.
INSPECT MAGNETIC CLUTCH OPERATION
3
(a) Disconnect the connector.
(b) Connect the positive (+) lead form the battery to terminal
3 and the negative (–) lead to the body ground.
(c) Check that the magnetic clutch energized.
If operation is not as specified, replace the magnetic clutch.
I12998
AVENSIS/CORONA SUP (RM781E)
English 