engine coolant CHRYSLER VOYAGER 2002 Service Manual

(22) Install right engine mount (Refer to 9 -
ENGINE/ENGINE MOUNTING/RIGHT MOUNT -
INSTALLATION).
(23) Install generator (Refer to 8 - ELECTRICAL/
CHARGING/GENERATOR - INSTALLATION).
(24) Install accessory drive belt (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
INSTALLATION).
(25) Install power steering belt (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
INSTALLATION).
(26) Install air cleaner housing assembly.
(27) Remove crankshaft and both camshaft locking
pins (Refer to 9 - ENGINE/VALVE TIMING - STAN-
DARD PROCEDURE).
(28) Refill cooling system (Refer to 7 - COOLING/
ENGINE/COOLANT - STANDARD PROCEDURE).
(29) Install engine cover (Refer to 9 - ENGINE -
INSTALLATION).
(30) Install front wiper unit (Refer to 8 - ELEC-
TRICAL/WIPERS/WASHERS/WIPER MODULE -
INSTALLATION).
(31) Connect negative battery cable.
CAMSHAFT OIL SEAL(S)
REMOVAL
(1) Disconnect negative battery cable.
(2) Remove air cleaner housing assembly.
(3) Support engine and remove right engine mount
(Refer to 9 - ENGINE/ENGINE MOUNTING/RIGHT
MOUNT - REMOVAL).
(4) Remove outer timing belt cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - REMOVAL).
WARNING: Before removing the timing belt the
engine must put at 90É after TDC. Failure to do so
could result in valve and/or piston damage during
reassembly. (Refer to 9 - ENGINE/VALVE TIMING -
STANDARD PROCEDURE)
(5) Remove timing belt (Refer to 9 - ENGINE/
VALVE TIMING/TIMING BELT/CHAIN AND
SPROCKETS - REMOVAL).
(6) Using VM.1055, remove both camshaft gears
(Fig. 28).
(7) Remove both camshaft oil seals.
INSTALLATION
(1) Install new camshaft oil seal using VM.1057.
(2) Install camshaft sprockets and tighten retain-
ing bolts finger tight.
(3) Install timing belt (Refer to 9 - ENGINE/
VALVE TIMING/TIMING BELT/CHAIN AND
SPROCKETS - INSTALLATION) .(4) Torque camshaft sprockets to 108 N´m using
VM.1055 (Fig. 28).
(5) Install outer timing belt cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - INSTALLATION).
(6) Install right engine mount (Refer to 9 -
ENGINE/ENGINE MOUNTING/RIGHT MOUNT -
INSTALLATION).
(7) Install air cleaner housing assembly.
(8) Connect negative battery cable.
ROCKER ARMS
DESCRIPTION
The rocker arms are made of stamped steel (Fig.
29).
OPERATION
The rocker arms are used as a link between the
camshaft and valves. As the camshaft rotates the
lobes of the camshafts apply downward pressure on
the rocker arms. This pressure is then transmitted to
the valves which causes the valves to open.
REMOVAL
(1) Disconnect negative battery cable.
Fig. 28 CAMSHAFT GEAR REMOVAL/INSTALLATION
1 - TIMING BELT INNER COVER
2 - CAMSHAFT SPROCKET
3 - IDLER PULLEYS
4 - CAMSHAFT SPROCKET
5 - VM.1055
RGENGINE9a-27
CYLINDER HEAD COVER(S) (Continued)
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(2) Remove front wiper unit (Refer to 8 - ELEC-
TRICAL/WIPERS/WASHERS/WIPER MODULE -
REMOVAL).
(3) Remove air cleaner housing assembly.
(4) Support engine and remove right engine mount
(Refer to 9 - ENGINE/ENGINE MOUNTING/RIGHT
MOUNT - REMOVAL).
(5) Remove outer timing belt cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - REMOVAL).
(6) Remove timing belt (Refer to 9 - ENGINE/
VALVE TIMING/TIMING BELT/CHAIN AND
SPROCKETS - REMOVAL).
(7) Remove inner timing belt cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - REMOVAL).
(8) Remove cylinder head cover/intake manifold
(Refer to 9 - ENGINE/CYLINDER HEAD/CYLIN-
DER HEAD COVER(S) - REMOVAL).(9) Remove rocker arm from lifter (Fig. 30).
INSTALLATION
(1) Clean and inspect gasket sealing surfaces.
(2) Install new gasket on cylinder head.
(3) Lubricate lifter ball end of lifter(s), valve(s),
and rocker arm roller(s) with MopartEngine Oil
Supplement or equivlalent.
(4) Connect rocker arm(s) to lifter and reposition
on valve(s) (Fig. 30).
(5) Install cylinder head cover/intake manifold
(Refer to 9 - ENGINE/CYLINDER HEAD/CYLIN-
DER HEAD COVER(S) - INSTALLATION).
(6) Install inner timing belt cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - INSTALLATION).
(7) Install timing belt (Refer to 9 - ENGINE/
VALVE TIMING/TIMING BELT/CHAIN AND
SPROCKETS - INSTALLATION) .
(8) Install outer timing belt cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - INSTALLATION).
(9) Install right engine mount (Refer to 9 -
ENGINE/ENGINE MOUNTING/RIGHT MOUNT -
INSTALLATION).
(10) Install air cleaner housing assembly.
Fig. 29 CYLINDER HEAD ASSEMBLY
1 - VALVE SPRING
2 - CYLINDER HEAD BOLT
3 - GLOW PLUG
4 - COOLANT TEMPERATURE SENSOR
5 - CYLINDER HEAD ALIGNMENT DOWEL
6 - CYLINDER BLOCK
7 - CYLINDER LINER
8 - ENGINE BLOCK DECK
9 - CYLINDER HEAD GASKET
10 - CYLINDER HEAD
11 - ROCKER ARM AND LIFTER ASSEMBLY
Fig. 30 ROCKER ARM ASSEMBLY
1 - ROCKER ARM ASSEMBLY
2 - CYLINDER HEAD COVER/INTAKE MANIFOLD
3 - HYDRAULIC LIFTER
4 - CYLINDER HEAD
5 - VALVE
9a - 28 ENGINERG
ROCKER ARMS (Continued)
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(11) Install front wiper unit (Refer to 8 - ELEC-
TRICAL/WIPERS/WASHERS/WIPER MODULE -
INSTALLATION).
(12) Connect negative battery cable.
HYDRAULIC LIFTERS
DESCRIPTION
Valve lash is controlled by hydraulic tappets
located inside the cylinder head, in tappet bores
below the camshafts (Fig. 31).
REMOVAL
(1) Disconnect negative battery cable.
(2) Remove front wiper unit (Refer to 8 - ELEC-
TRICAL/WIPERS/WASHERS/WIPER MODULE -
REMOVAL).(3) Remove engine cover (Refer to 9 - ENGINE -
REMOVAL).
(4) Support engine and remove right engine mount
(Refer to 9 - ENGINE/ENGINE MOUNTING/RIGHT
MOUNT - REMOVAL).
(5) Remove outer timing belt cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - REMOVAL).
CAUTION: Before removing the cylinder head cover/
intake manifold or the timing belt the engine must
put at 90É after TDC. Failure to do so could result in
valve and/or piston damage during reassembly.
(Refer to 9 - ENGINE/VALVE TIMING - STANDARD
PROCEDURE)
(6) Remove timing belt (Refer to 9 - ENGINE/
VALVE TIMING/TIMING BELT/CHAIN AND
SPROCKETS - REMOVAL).
(7) Remove inner timing belt cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - REMOVAL).
(8) Remove cylinder head cover/intake manifold
(Fig. 32)(Refer to 9 - ENGINE/CYLINDER HEAD/
CYLINDER HEAD COVER(S) - REMOVAL).
Fig. 31 CYLINDER HEAD ASSEMBLY
1 - VALVE SPRING
2 - CYLINDER HEAD BOLT
3 - GLOW PLUG
4 - COOLANT TEMPERATURE SENSOR
5 - CYLINDER HEAD ALIGNMENT DOWEL
6 - CYLINDER BLOCK
7 - CYLINDER LINER
8 - ENGINE BLOCK DECK
9 - CYLINDER HEAD GASKET
10 - CYLINDER HEAD
11 - ROCKER ARM AND LIFTER ASSEMBLY
Fig. 32 CYLINDER HEAD COVER/INTAKE
MANIFOLD
1 - CYLINDER HEAD COVER/INTAKE MANIFOLD BOLTS(LONG)
2 - CYLINDER HEAD COVER/INTAKE MANIFOLD
3 - CYLINDER HEAD
4 - CYLINDER HEAD COVER/INTAKE MANIFOLD GASKET
5 - CYLINDER HEAD COVER/INTAKE MANIFOLD
BOLTS(SHORT)
RGENGINE9a-29
ROCKER ARMS (Continued)
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(4) Using special tool VM.1059, push oil pressure
relief valve cap in untill flush with engine block (Fig.
77).
(5) Install oil pan (Refer to 9 - ENGINE/LUBRI-
CATION/OIL PAN - INSTALLATION).
OIL COOLER & LINES
REMOVAL
(1) Drain cooling system (Refer to 7 - COOLING/
ENGINE/COOLANT - STANDARD PROCEDURE).
(2) Raise vehicle on hoist.
(3) Remove oil filter cap and filter (Refer to 9 -
ENGINE/LUBRICATION/OIL FILTER - REMOVAL).
(4) Remove oil filter housing retaining nut and
housing (Fig. 78).
(5) Disconnect coolant hoses at cooler (Fig. 79).
(6) Remove oil cooler retaining bolt at engine block
(Fig. 79).
(7) Remove oil cooler retaining stud and remove oil
cooler from engine block (Fig. 79).
INSTALLATION
(1) Clean oil cooler and engine block sealing sur-
faces.
Fig. 77 OIL PRESSURE RELIEF VALVE
INSTALLATION
1 - VM.1059
2 - OIL PRESSURE RELIEF VALVE
3 - ENGINE BLOCK
4 - OIL PUMP
Fig. 78 OIL FILTER HOUSING RETAINING NUT
1 - OIL FILTER HOUSING
2 - OIL FILTER HOUSING RETAINING NUT
3 - OIL COOLER
Fig. 79 WATER PUMP AND OIL COOLER
ASSEMBLIES
1 - WATER PUMP HOUSING STUDS
2 - WATER PUMP
3 - RETAINING NUTS
4 - OIL COOLER RETAINING STUD
5 - OIL COOLER TO ENGINE BLOCK RETAINING BOLT
6 - OIL COOLER COOLANT HOSE
7 - ENGINE BLOCK
9a - 50 ENGINERG
OIL PRESSURE RELIEF VALVE (Continued)
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(2) Install oil cooler, retaining bolt, and stud (Fig.
79). Torque retaining bolt to 47.1N´m and stud to
50N´m.
(3) Connect coolant hoses at cooler (Fig. 79).
(4) Install oil filter housing and retaining nut (Fig.
78). Torque retaining nut to 3.5 Kg.
(5) Install oil filter cartridge and oil filter cap
(Refer to 9 - ENGINE/LUBRICATION/OIL FILTER -
INSTALLATION).
(6) Lower vehicle.
(7) Refill cooling system (Refer to 7 - COOLING/
ENGINE/COOLANT - STANDARD PROCEDURE).
(8) Start engine and check for leaks.
(9) Check and adjust oil level as necessary.
OIL FILTER
DESCRIPTION
The oil filter used on this engine is a cartridge
style filter (Fig. 80).
REMOVAL
(1) Raise vehicle on hoist.
(2) Remove oil filter cap drain plug and drain oil
from oil filter housing (Fig. 81).
(3) Remove oil filter cap with suitable oil filter
wrench (Fig. 81).
(4) Remove oil filter cartridge from housing.
INSTALLATION
(1) Clean oil filter cap and drain plug with suit-
able solvent.
(2) Install new oil filter cartridge in oil filter hous-
ing.
(3) Install oil filter cap and drain plug
(4) Lower vehicle from hoist.
(5) Start engine and check for leaks.
(6) Check and adjust oil level as necessary.
Fig. 80 OIL FILTER ASSEMBLY
1 - OIL FILTER CAP
2 - DRAIN PLUG
3 - OIL FILTER CARTRIDGE
Fig. 81 OIL COOLER AND FILTER ASSEMBLY
1 - WATER PUMP HOUSING
2 - OIL FILTER HOUSING
3 - OIL FILTER CAP
4 - OIL FILTER CAP DRAIN PLUG
5 - OIL COOLER
RGENGINE9a-51
OIL COOLER & LINES (Continued)
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VALVE TIMING
STANDARD PROCEDURE - LOCKING ENGINE
90É AFTER TDC
(1) Disconnect negative battery cable.
(2) Remove starter motor (Refer to 8 - ELECTRI-
CAL/STARTING/STARTER MOTOR - REMOVAL).
(3) Rotate engine untill notch in hub is in the fol-
lowing position (Fig. 84).
(4) Special tool VM.1068 can be install in engine
block as shown at this time (Fig. 85). This will lock
the engine at 90É after TDC.
(5) Remove front wiper unit (Refer to 8 - ELEC-
TRICAL/WIPERS/WASHERS/WIPER MODULE -
REMOVAL).
(6) Remove engine cover (Refer to 9 - ENGINE -
REMOVAL).
(7) Remove plug in cylinder head cover/intake
manifold and insert VM.1053 to lock exhaust cam-
shaft in position (Fig. 86).
(8) Remove generator (Refer to 8 - ELECTRICAL/
CHARGING/GENERATOR - REMOVAL).
Fig. 84 CRANKSHAFT HUB ALIGNMENT
1 - VIBRATION DAMPER/CRANKSHAFT PULLEY
2 - CRANKSHAFT HUB NOTCH
3 - VIBRATION DAMPER/CRANKSHAFT PULLEY TO
CRANKSHAFT HUB BOLTS
Fig. 85 TDC AND 90 DEGREES AFTER TDC
ALIGNMENT PIN LOCATION
1 - ENGINE BLOCK
2 - VM.1051 TDC PIN OR VM.1068 90 DEGREES ATDC PIN
3 - FLYWHEEL
Fig. 86 EXHAUST CAMSHAFT LOCKING PIN
VM.1053
1 - EXHAUST MANIFOLD HEAT SHIELD
2 - EXHAUST CAMSHAFT LOCKING PIN VM.1053
3 - COOLANT TUBE FROM THERMOSTAT HOUSING TO UPPER
RADIATOR HOSE
4 - CYLINDER HEAD COVER/INTAKE MANIFOLD
RGENGINE9a-53
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TURBOCHARGER
REMOVAL
The exhaust manifold and turbocharger cannot be
remove with the engine in vehicle.
(1) Remove engine from vehicle and mount on
engine stand (Refer to 9 - ENGINE - REMOVAL).
(2) Remove thermostat to upper radiator hose pipe
(Fig. 5).(3) Remove engine lift hook (Fig. 6).
(4) Remove exhaust manifold heat shield (Fig. 6).
(5) Disconnect turbocharger oil supply and return
lines at turbocharger (Fig. 6).
(6) Remove exhaust manifold retaining nuts (Fig.
6).
(7) Remove exhaust manifold and turbocharger
from engine (Fig. 6).
Fig. 5 TURBOCHARGER AND COOLANT PIPES
1 - TURBOCHARGER OUTLET PIPE RETAINING BOLT
2 - TURBOCHARGER OUTLET PIPE
3 - ADAPTER HOSE
4 - HEAT SHIELD
5 - HOSE CLAMPS
6 - TURBOCHARGER INLET PIPE RETAINING BOLT
7 - TURBOCHARGER INLET PIPE
8 - ADAPTER HOSE
9 - HOSE CLAMPS
10 - CLAMP
11 - EGR VALVE TO INTAKE AIR INLET PIPE
12 - CLAMP
13 - THERMOSTAT HOUSING TO UPPER RADIATOR HOSE
PIPE
Fig. 6 EXHAUST MANIFOLD AND TURBOCHARGER
1 - TURBOCHARGER OIL SUPPLY BANJO BOLT
2 - COPPER WASHER
3 - EXHAUST MANIFOLD GASKET
4 - COPPER WASHER
5 - EXHAUST MANIFOL HEAT SHIEL RETAINING BOLT
6 - TURBOCHARGER
7 - ENGINE LIFT HOOK
8 - ENGINE LIFT HOOK RETAINING BOLT
9 - SPACER
10 - EXHAUST MANIFOLD RETAINING NUT
11 - TURBOCHARGER OIL RETURN HOSE
12 - HOSE CLAMPS
13 - EXHAUST MANIFOLD STUDS
11a - 4 EXHAUST SYSTEM AND TURBOCHARGERRG
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(8) With exhaust manifold and turbocharger
assembly on work bench, remove turbocharger to
exhaust manifold retaining bolts. Separate exhaust
manifold and turbocharger.
CLEANING
All old gaskets should be inspected for any tears or
signs of prior leakage. If any gaskets show such indi-
cations, they should be replaced with new gaskets.
All gasket mating surfaces must be cleaned of old
gasket material to produce a smooth and dirt free
sealing surface for the new gasket.
INSTALLATION
(1) Connect exhaust manifold and turbocharger.
Torque nuts to 32.4N´m.
(2) Position new exhaust manifol gasket on
exhaust manifol studs (Fig. 6).
(3) Install exhaust manifold and turbocharger on
engine (Fig. 6). Torque nuts to 32.4N´m.
(4) Connect turbocharger oil supply and return
lines at turbocharger (Fig. 6). Torque oil supply line
to 24.5N´m.
(5) Install exhaust manifold shield (Fig. 6). Torque
bolts to 27.5N´m.
(6) Install engine lift hook (Fig. 6). Torque bolts to
32.4N´m.
(7) Install thermostat to upper radiator hose tube
and turbocharger outlet tube (Fig. 5).
(8) Install engine in vehicle (Refer to 9 - ENGINE
- INSTALLATION).
HEAT SHIELDS
REMOVAL
(1) Remove front wiper unit (Refer to 8 - ELEC-
TRICAL/WIPERS/WASHERS/WIPER MODULE -
REMOVAL).
(2) Remove engine cover (Refer to 9 - ENGINE -
REMOVAL).
(3) Partially drain cooling system (Refer to 7 -
COOLING/ENGINE/COOLANT - STANDARD PRO-
CEDURE).
(4) Remove thermostat housing to upper radiator
hose tube (Fig. 7).
(5) Remove exhaust manifold heat shield retaining
bolts and remove shield (Fig. 8).
Fig. 7 TURBOCHARGER AND COOLANT PIPES
1 - TURBOCHARGER OUTLET PIPE RETAINING BOLT
2 - TURBOCHARGER OUTLET PIPE
3 - ADAPTER HOSE
4 - HEAT SHIELD
5 - HOSE CLAMPS
6 - TURBOCHARGER INLET PIPE RETAINING BOLT
7 - TURBOCHARGER INLET PIPE
8 - ADAPTER HOSE
9 - HOSE CLAMPS
10 - CLAMP
11 - EGR VALVE TO INTAKE AIR INLET PIPE
12 - CLAMP
13 - THERMOSTAT HOUSING TO UPPER RADIATOR HOSE
PIPE
RGEXHAUST SYSTEM AND TURBOCHARGER11a-5
TURBOCHARGER (Continued)
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INSTALLATION
(1) Reposition exhaust heat shield (Fig. 8).
(2) Install exhaust heat shield retaining bolts (Fig.
8). Torque bolts to 27.5N´m.
(3) Install thermostat housing to upper radiator
hose tube (Fig. 7).
(4) Refill cooling system (Refer to 7 - COOLING/
ENGINE/COOLANT - STANDARD PROCEDURE).
(5) Install engine cover (Refer to 9 - ENGINE -
INSTALLATION).
(6) Install front wiper unit (Refer to 8 - ELECTRI-
CAL/WIPERS/WASHERS/WIPER MODULE -
INSTALLATION).
Fig. 8 EXHAUST MANIFOLD AND TURBOCHARGER
1 - TURBOCHARGER OIL SUPPLY BANJO BOLT
2 - COPPER WASHER
3 - EXHAUST MANIFOLD GASKET
4 - COPPER WASHER
5 - EXHAUST MANIFOL HEAT SHIEL RETAINING BOLT
6 - TURBOCHARGER
7 - ENGINE LIFT HOOK
8 - ENGINE LIFT HOOK RETAINING BOLT
9 - SPACER
10 - EXHAUST MANIFOLD RETAINING NUT
11 - TURBOCHARGER OIL RETURN HOSE
12 - HOSE CLAMPS
13 - EXHAUST MANIFOLD STUDS
11a - 6 EXHAUST SYSTEM AND TURBOCHARGERRG
HEAT SHIELDS (Continued)
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FUEL INJECTION
OPERATION
OPERATION - INJECTION SYSTEM
All engines used in this section have a sequential
Multi-Port Electronic Fuel Injection system. The MPI
system is computer regulated and provides precise
air/fuel ratios for all driving conditions. The Power-
train Control Module (PCM) operates the fuel injec-
tion system.
The PCM regulates:
²Ignition timing
²Air/fuel ratio
²Emission control devices
²Cooling fan
²Charging system
²Idle speed
²Vehicle speed control
Various sensors provide the inputs necessary for
the PCM to correctly operate these systems. In addi-
tion to the sensors, various switches also provide
inputs to the PCM.
The PCM can adapt its programming to meet
changing operating conditions.
Fuel is injected into the intake port above the
intake valve in precise metered amounts through
electrically operated injectors. The PCM fires the
injectors in a specific sequence. Under most operat-
ing conditions, the PCM maintains an air fuel ratio
of 14.7 parts air to 1 part fuel by constantly adjust-
ing injector pulse width. Injector pulse width is the
length of time the injector is open.
The PCM adjusts injector pulse width by opening
and closing the ground path to the injector. Engine
RPM (speed) and manifold absolute pressure (air
density) are theprimaryinputs that determine
injector pulse width.
OPERATION - MODES OF OPERATION
As input signals to the PCM change, the PCM
adjusts its response to output devices. For example,
the PCM must calculate a different injector pulse
width and ignition timing for idle than it does for
Wide Open Throttle (WOT). There are several differ-
ent modes of operation that determine how the PCM
responds to the various input signals.
There are two different areas of operation, OPEN
LOOP and CLOSED LOOP.
During OPEN LOOP modes the PCM receives
input signals and responds according to preset PCM
programming. Inputs from the upstream and down-
stream heated oxygen sensors are not monitored dur-
ing OPEN LOOP modes, except for heated oxygensensor diagnostics (they are checked for shorted con-
ditions at all times).
During CLOSED LOOP modes the PCM monitors
the inputs from the upstream and downstream
heated oxygen sensors. The upstream heated oxygen
sensor input tells the PCM if the calculated injector
pulse width resulted in the ideal air-fuel ratio of 14.7
to one. By monitoring the exhaust oxygen content
through the upstream heated oxygen sensor, the
PCM can fine tune injector pulse width. Fine tuning
injector pulse width allows the PCM to achieve opti-
mum fuel economy combined with low emissions.
For the PCM to enter CLOSED LOOP operation,
the following must occur:
(1) Engine coolant temperature must be over 35ÉF.
²If the coolant is over 35ÉF the PCM will wait 38
seconds.
²If the coolant is over 50ÉF the PCM will wait 15
seconds.
²If the coolant is over 167ÉF the PCM will wait 3
seconds.
(2) For other temperatures the PCM will interpo-
late the correct waiting time.
(3) O2 sensor must read either greater than 0.745
volts or less than 0.29 volt.
(4) The multi-port fuel injection systems has the
following modes of operation:
²Ignition switch ON (Zero RPM)
²Engine start-up
²Engine warm-up
²Cruise
²Idle
²Acceleration
²Deceleration
²Wide Open Throttle
²Ignition switch OFF
(5) The engine start-up (crank), engine warm-up,
deceleration with fuel shutoff and wide open throttle
modes are OPEN LOOP modes. Under most operat-
ing conditions, the acceleration, deceleration (with
A/C on), idle and cruise modes,with the engine at
operating temperatureare CLOSED LOOP modes.
IGNITION SWITCH ON (ZERO RPM) MODE
When the ignition switch activates the fuel injec-
tion system, the following actions occur:
²The PCM monitors the engine coolant tempera-
ture sensor and throttle position sensor input. The
PCM determines basic fuel injector pulse width from
this input.
²The PCM determines atmospheric air pressure
from the MAP sensor input to modify injector pulse
width.
When the key is in the ON position and the engine
is not running (zero rpm), the Auto Shutdown (ASD)
and fuel pump relays de-energize after approximately
RSFUEL INJECTION14-17
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