Inspection Of Refrigeration System With Manifold Gauge Set - Toyota HILUX 1993 Repair Manual

AC–12

Inspection of Refrigeration System with Manifold Gauge Set

This is a method in which the trouble is located by using a manifold gauge set. (See "Installation of Mani–
fold Gauge Set" on page AC–16. ) Read the manifold gauge pressure when the following conditions are
established:
(b) Engine running at 2,000 rpm
(a) Temperature at the air inlet with the switch set at RECIRC is 30 – 35
(c) Blower fan speed control switch set at high speed
(d) Temperature control switch set at max. cool side
HINT: It should be noted that the gauge indications may vary slightly due to ambient temperature condi–
tions.
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 refriger-
ant line.
No.
AIR CONDITIONING SYSTEM
Condition
Normal cooling
Periodically cools and
then fails to cool
– Troubleshooting
S
C (86 – 95
Probable cause
Normally functioning
system
Moisture present in
refrigeration system
S
F)
Remedy
(1) Replace receiver
(2) Remove moisture
in system through
repeatedly evacu–
ating air