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SEF278X
Description
=NFEC1116
COMPONENT DESCRIPTION
NFEC1116S01
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
NFEC1116S02
SEC936C
CONSULT-II Reference Value in Data Monitor
Mode
NFEC1117
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
VC/V BYPASS/V I Ignition switch: ON OFF
On Board Diagnosis Logic
NFEC1119
DTC No.
Trouble diagnosis
name
DTC Detecting Condition Possible Cause
P1490
1490
Vacuum cut valve
bypass valve circuit
An improper voltage signal is sent to ECM through
vacuum cut valve bypass valve.
I Harness or connectors
(The vacuum cut valve bypass valve
circuit is open or shorted.)
I Vacuum cut valve bypass valve
DTC P1490 VACUUM CUT VALVE BYPASS VALVE
Description
EC-622
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