Toyota Celica 1993 AT200 series Repair Manual page 1020

AIR CONDTTTONING
SYSTEM - VACUUM SWITCHING VALVE
(a)
(b)
V A C U U M S W I T C H I N G V A L V E ( V S V )
Ex. 7A-FE Engine Models:
VACUUM HOSE CIRCUIT
VSV INSPECTION
1. REMOVE VSV
2,
CHECK VACUUM CIRCUIT CONTII{UITY IN VSV BY
BLOWII{G AIR INTO PIPES
Connect tho VSV t€rminals to th€ battery t€rminals as
illusstrated.
B l o w i n t o p i p e ' A ' a n d c h e c k t h a t a i r c o m o s o u t o f
pipe "B'.
(c) Disconnect the battery.
(d) Blow into pipe "A" and check that air doss not coms
out of pipe
'8".
lf a problem is found, replace the VSV.
C H E C K F O R S H O R T C I R C U I T
Using an ohmmeter, check that there is no continuity
betwegn each terminal and tho VSV.
lf ther6 is continuity, roplace the VSV.
4.
CHECK FOR OPEN CIRCUIT
Using an ohmmetsr, m€asure the resistance botwoen
th6 two terminals.
Resistance:
30 - 34 Q 8t 20'C (68"F)
lf resistance value is not as specified, replace the VSV.