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Description
NGEC0349
SYSTEM DESCRIPTION
NGEC0349S01
Sensor Input Signal to ECM
ECM func-
tion
Actuator
Camshaft position sensor Engine speed
EGR control EGRC-solenoid valve
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Ignition switch Start signal
Throttle position sensor Throttle position
This system cuts and controls vacuum applied to the EGR valve to
suit engine operating conditions. This cut-and-control operation is
accomplished through the ECM and the EGRC-solenoid valve.
When the ECM detects any of the following conditions, current
through the solenoid valve is cut. This causes the vacuum to be
cut. The EGR valve remains closed.
쐌 Low engine coolant temperature
쐌 Engine starting
쐌 High-speed engine operation
쐌 Engine idling
쐌 Excessively high engine coolant temperature
쐌 Mass air flow sensor malfunction
SEF641Q
SEF783K
COMPONENT DESCRIPTION
NGEC0349S02
Exhaust Gas Recirculation (EGR) Valve
NGEC0349S0201
The EGR valve controls the amount of exhaust gas routed to the
intake manifold. Vacuum is applied to the EGR valve in response
to throttle valve opening. The vacuum controls the movement of a
taper valve connected to the vacuum diaphragm in the EGR valve.
DTC P1402 EGR FUNCTION (OPEN)
KA24DE
Description
EC-465
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
GI
MA
EM
LC
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