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SEF278X
Description
=NHEC0346
COMPONENT DESCRIPTION
NHEC0346S01
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
NHEC0346S02
SEF323U
CONSULT-II Reference Value in Data Monitor
Mode
NHEC0347
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
VC/V BYPASS/V I Ignition switch: ON OFF
On Board Diagnosis Logic
NHEC0349
Malfunction is detected when an improper voltage signal is sent to
ECM through vacuum cut valve bypass valve.
DTC P1490 VACUUM CUT VALVE BYPASS VALVE (CIRCUIT)
Description
EC-576
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