Toyota HILUX 1993 Repair Manual page 1334

AC–14
NOTICE:
Always recover refrigerant before removing the parts in the refrigerant line and evacuating air.
Evacuate air and charge proper amount of purified refrigerant after installing the parts in the
refrigerant line.
No.
AIR CONDITIONING SYSTEM
Condition
Does not cool
(Cools from time to
time in some cases)
Frost or dew seen
on piping before
and after receiver or
expansion valve
Does not cool
– Troubleshooting
Probable cause
Refrigerant does not
circulate
Insufficient compres–
sion
Remedy
(1) Check heat sens–
ing tube for gas
leakage and re–
place expansion
valve if defective
If
(1) is normal
(2) Clean out dirt in
expansion valve
by blowing with
air
If not able to re–
move dirt, replace
expansion valve
(3) Replace receiver
Repair or replace com–
pressor