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EMISSION
CONTROL
SYSTEMS
25
- 1
CONTENTS
page page
AIR INJECTION
SYSTEM-o
9L
HDC-GAS EVAPORATIVE EMISSION CONTROLS
6
ENGINE
15
EXHAUST EMISSION CONTROLS
10
COMPONENT
REMOVAL/INSTALLATION
17
GENERAL INFORMATION
1
GENERAL
INFORMATION
Throughout this group, references are made
to
par
ticular vehicle models
by
alphabetical designation
or
by the particular vehicle nameplate.
A
chart showing a breakdown
of
alphabetical designations
is
included
in
the
Introduction section
at
the
beginning
of
this
manual.
The 5.9L (V-8) gas powered engine will
be
referred
to
in
this group
as
either the: LDC (Light Duty Cy cle)
or
HDC (Heavy Duty Cycle) engine.
The
HDC
engine can
be
easily identified
by
the
use
of
an en
gine mounted
air
injection pump. The 3.9L/5.2L/5.9L
LDC engine will not use
an
air
injection pump.
Maintenance requirements for LDC and HDC emis
sion systems differ because
of
different load
and
op
erating conditions. This section will cover emission control systems
for
the 3.9L (V-6), 5.2L (V-8), 5.9L LDC (V-8), 5.9L HDC (V-8) and 5.9L (in-line six cylinder) diesel engines.
SERVICE
REMINDER INDICATOR
(SRI)
LIGHT
The instrument panel mounted SRI light was for
merly referred
to as the
emission maintenance
re
minder (EMR) light.
It is
used with 5.9L HDC-gas
powered engines only.
It is
not
used with diesel
en
gines.
The SRI system
is
incorporated into the powertrain
control module (PCM)
(the
PCM
was
formerly
re
ferred
to as the
engine controller
or
SBEC).
The
PCM records
the
vehicles mileage and stores
it
into
memory every
8
miles. At that time, the PCM checks
for the 60,000 and 82,500 mileage trip points. When
the current mileage matches one
of
the above men
tioned trip points,
the
SRI light
is
activated.
The following parts are
to
be replaced
at
either the
indicated mileage
or
when the SRI light remains
on
when the key
is in
the ON position. After performing
the required maintenance,
the
SRI light must
be
re set
to
turn the light
off.
96,000
km
(60,000 miles):
• Replace EGR Valve
• Clean EGR passage • Replace PCV Valve
132,000
km
(82,500 miles):
• Replace Oxygen Sensor
Refer
to
Group
0,
Lubrication and Maintenance
for
all required maintenance schedules.
Failure
to
perform
the
required maintenance
and
only reset the SRI light may be
a
violation of federal
law. Only after performing
the
required mainte
nance, should the SRI light
be
reset.
RESETTING
SRI
LIGHT
(1) Connect
the
DRB
II
scan tool
to
the
data link
connector (Fig.
1)
in
the engine compartment.
TORQUE CONVERTER
CLUTCH RELAY
A/C
CLUTCH RELAY
.
STARTER RELAY
AUTO
SHUTDOWN RELAY FUEL PUMP RELAY DATA LINK
CONNECTOR POWERTRAIN
CONTROL
MODULE
J9314-164
Fig.
1
Data
Link
Connector
(2) Refer
to
DRB
II
scan tool operation
in
the ap
propriate Powertrain Diagnostic Procedures manual. (3) Reset SRI light.
VEHICLE
EMISSION CONTROL INFORMATION
(VECI)
LABEL
All vehicles equipped with
a
gasoline powered
en
gine have
a
VECI label. The 3.9L/5.2L/5.9L LDC-gas powered engine will
have
a
label that combines both emission control
in
formation and vacuum hose routing.
EMISSION CONTROL
SYSTEMS
