Toyota Celica 1993 AT200 series Repair Manual page 975

AC-20
AIR CONDITIONING SYSTEM _ TROUBLESHOOTING
R E F R I G E R A N T S Y S T E M I N S P E C T I O N W I T H M A N ! F O L D G A U G E S E T
This is a method in which the trouble is located by using a manifold gauge set.
( S e e " U S E O F M A N I F O L D G A U G E S E T " o n p a g e A C - 1 5 )
Read the manifold gauge pressure when the following conditions are 6stablished:
( a ) T e m p e r a t u r e a t t h e a i r i n l e t w i t h t h s s w i t c h s e t a t R E C I R C i s 3 0 - 3 5 ' C ( 8 6 - 9 5 ' F )
( b ) E n g i n e r u n n i n g a t l , 5 O O r p m
(c) Blower speed control switch sot at high
(d) Temperature control set at max. cool
HINT: lt should be noted that tho gauge indications may vary slightly due to ambient temperaturo
c o n d i t i o n s .
1.
NORMALLY FUNCTIONING REFRIGERATION SYSTEM
Gauge reading:
Low prassure sida:
0.1 5 - 0.25 MPa (1.5 - 2.5 kgl / cm' l
High pressure side:
1.37 - 1.57 MPa (14 - 16 ksl/cm'J
R t gtcr