SEF278X
Description
NHEC1123
COMPONENT DESCRIPTION
NHEC1123S01
The vacuum cut valve and vacuum cut valve bypass valve are
installed in parallel on the EVAP purge line between the fuel tank
and the EVAP canister.
The vacuum cut valve prevents the intake manifold vacuum from
being applied to the fuel tank.
The vacuum cut valve bypass valve is a solenoid type valve and
generally remains closed. It opens only for on board diagnosis.
The vacuum cut valve bypass valve responds to signals from the
ECM. When the ECM sends an ON (ground) signal, the valve is
opened. The vacuum cut valve is then bypassed to apply intake
manifold vacuum to the fuel tank.
EVAPORATIVE EMISSION SYSTEM DIAGRAM
NHEC1123S02
SEC936C
CONSULT-II Reference Value in Data Monitor
Mode
NHEC1124
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
VC/V BYPASS/V
쐌
Ignition switch: ON
OFF
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1491 VACUUM CUT VALVE BYPASS VALVE
Description
EC-593