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3 CHECK VACUUM HOSE
1. Stop engine.
2. Check hoses and tubes between intake manifold and power valve actuator for crack, clogging, disconnection or
improper connection.
SEF109L
OK or NG
OK © GO TO 4.
NG © Replace vacuum hose.
4 CHECK VACUUM TANK
1. Disconnect vacuum hose connected to vacuum tank.
2. Connect a vacuum pump to port (at the center) of vacuum tank.
3. Apply vacuum and make sure that vacuum exists at another port.
SEC131D
OK or NG
OK © GO TO 5.
NG © Replace vacuum tank.
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)
Diagnostic Procedure (Cont’d)
EC-689
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