HEATER, AIR CONDITIONER AND VENTILATION ± On-vehicle Service
55-9
MAGNETIC CLUTCH TEST
1. Disconnect the connector (1-pin) to the magnetic clutch.
2. Connect battery (+) voltage directly to the connector for
the magnetic clutch.
3. If the magnetic clutch is normal, there will be ªclickº. If
the pulley and armature do not make contact (`click'), there
is a malfunction.
RECEIVER DRIER TEST
Operate the unit and check the piping temperature by touching
the receiver drier outlet and inlet.
If there is a difference in the temperatures, the receiver drier
is restricted.
Replace the receiver drier.
COMPRESSOR DRIVE BELT ADJUSTMENT
Refer to GROUP 11 ± On-vehicle Service.
DUAL PRESSURE SWITCH CHECK
1. Remove the dual pressure switch connector and connect
the high/low pressure side terminals located on the harness
side as shown in the illustration.
2. Install a gauge manifold to the high
-pressure side service
valve of the refrigerant line. (Refer to Performance Test.)
3. When the high/low pressure sides of the dual pressure
switch are at operation pressure (ON) and there is
continuity between the respective terminals, then the
condition is normal. If there is no continuity, replace the
switch.
ON
177 " 20
kPa
LOW-PRESSURE
SIDE
HIGH-PRESSURE
SIDE
186 " 20
OFF
Dual pressure
switch
2,650
" 200
2,050
" 200
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