radiator DODGE NEON 1999 Service User Guide

There may be internal leaks, which can be deter-
mined by removing the oil dipstick. If water globules
appear intermixed with the oil, it indicates an inter-
nal leak in the engine. If there is an internal leak,
the engine must be disassembled for repair.
PRESSURE CAP TO FILLER NECK SEAL
PRESSURE RELIEF CHECK
The pressure cap upper gasket (seal) pressure
relief can be checked by removing the overflow hose
at the radiator filler neck nipple (Fig. 10). Attach the
radiator pressure tester to thefiller neck nipple,
and pump air into the system. The pressure cap
upper gasket should relieve pressure at 69-124 kPa
(10-18 psi), and hold pressure at 55 kPa (8 psi) min-
imum.
WARNING: THE WARNING WORDS DO NOT OPEN
HOT ON THE PRESSURE CAP IS A SAFETY PRE-
CAUTION. WHEN HOT, THE COOLING SYSTEM
BUILDS UP PRESSURE. TO PREVENT SCALDING
OR OTHER INJURY, THE PRESSURE CAP SHOULD
NOT BE REMOVED WHILE THE SYSTEM IS HOT
AND/OR UNDER PRESSURE.
There is no need to remove the pressure cap at any
timeexceptfor the following purposes:
²Check and adjust coolant freeze point²Refill system with new coolant
²Conducting service procedures
²Checking for leaks
WARNING: IF VEHICLE HAS BEEN RUN
RECENTLY, WAIT 15 MINUTES BEFORE REMOVING
CAP. PLACE A SHOP TOWEL OVER THE CAP, AND
WITHOUT PUSHING DOWN, ROTATE IT COUNTER-
CLOCKWISE TO THE FIRST STOP. ALLOW FLUIDS
TO ESCAPE THROUGH THE OVERFLOW TUBE.
WHEN THE SYSTEM STOPS PUSHING COOLANT
AND STEAM INTO THE CRS TANK AND PRESSURE
DROPS, PUSH DOWN ON THE CAP AND REMOVE
IT COMPLETELY. SQUEEZING THE RADIATOR
INLET HOSE WITH A SHOP TOWEL (TO CHECK
PRESSURE) BEFORE AND AFTER TURNING TO
THE FIRST STOP IS RECOMMENDED.
PRESSURE TESTING COOLING SYSTEM
PRESSURE CAP
Dip the pressure cap in water; clean off any depos-
its on the vent valve or its seat, and apply the cap to
end of radiator pressure tester (Fig. 11). Working the
plunger, increase the pressure to 104 kPa (15 psi) on
the gauge. If the pressure cap fails to hold pressure
of at least 97 kPa (14 psi), replace the cap.
CAUTION: The radiator pressure tester is very sen-
sitive to small air leaks that will not cause cooling
system problems. A pressure cap that does not
have a history of coolant loss should not be
replaced just because it leaks slowly when tested
with this tool. Add water to the tool. Turn the tool
upside down, and recheck the pressure cap to con-
firm that the cap is faulty.
If the pressure cap tests properly while posi-
tioned the on radiator pressure tester, but will not
hold pressure or vacuum when positioned on the
filler neck, inspect the filler neck and cap top gas-
ket for irregularities that may prevent the cap from
sealing properly.
LOW COOLANT LEVEL AERATION
²Will cause corrosion in the system.
²High reading shown on the temperature gauge.
²Air in the coolant will also cause loss of flow
through the heater.
²Exhaust gas leaks into the coolant can also
cause the above problems.
DEAERATION
Air can only be removed from the system by gath-
ering under the pressure cap. On the next heat up it
will be pushed past the pressure cap into the CRS
tank by thermal expansion of the coolant. It thenFig. 10 Cooling System Pressure Cap
PLCOOLING 7 - 15
DIAGNOSIS AND TESTING (Continued)

escapes to the atmosphere in the CRS tank and is
replaced with solid coolant on cool down.
TEMPERATURE GAUGE INDICATION
At idle the temperature gauge could rise slowly to
about 1/2 gauge travel. The fan will come on and the
gauge could drop to about 1/3 gauge travel, this is
normal.
SERVICE PROCEDURES
COOLANT LEVEL CHECKÐROUTINE
NOTE: Do not remove radiator cap for routine cool-
ant level inspections.
The coolant reserve system provides a quick visual
method for determining the coolant level without
removing the radiator cap. Simply observe, with the
engine idling and warmed up to normal operating
temperature, that the level of the coolant in the
reserve tank (Fig. 12) is between the add and full
marks.
COOLANTÐADDING ADDITIONAL
NOTE: The radiator cap should not be removed.
When additional coolant is needed, it should be
added to the coolant reserve tank. Use only 50/50
concentration of ethylene glycol type antifreeze and
water
COOLANT LEVELÐSERVICING
NOTE: The cooling system is closed and designed
to maintain coolant level to the top of the radiator.When servicing requires a coolant level check in
the radiator, the engine must beoffandnotunder
pressure. Drain several ounces of coolant from the
radiator drain cock while observing the Coolant
Recovery System (CRS) Tank. Coolant level in the
CRS tank should drop slightly. Then remove the radi-
ator cap. The radiator should be full to the top. If
not, and the coolant level in the CRS tank is at the
ADD mark there is a air leak in the CRS system.
Check hose or hose connections to the CRS tank,
radiator filler neck or the pressure cap seal to the
radiator filler neck for leaks.
COOLING SYSTEMÐDRAINING
NOTE: Drain, flush, and fill the cooling system at
the mileage or time intervals specified in Group 0,
Lubrication and Maintenance. If the solution is dirty,
rusty, or contains a considerable amount of sedi-
ment; clean and flush with a reliable cooling system
cleaner. Care should be taken in disposing of the
used engine coolant from your vehicle. Check gov-
ernmental regulations for disposal of used engine
coolant.
Without removing radiator pressure cap and
with system not under pressure:
(1) Shut engine off and turn draincock counter-
clockwise to open (Fig. 13).
(2) The coolant reserve tank should empty first,
then remove the pressure cap. (if not, Refer to Test-
ing Cooling System for leaks).
Fig. 11 Pressure Testing Radiator Cap
Fig. 12 Coolant Recovery System
7 - 16 COOLINGPL
DIAGNOSIS AND TESTING (Continued)

(9) Perform camshaft and crankshaft timing
relearn procedure as follows:
²Connect the DRB scan tool to the data link
(diagnostic) connector. This connector is located in
the passenger compartment; at the lower edge of
instrument panel; near the steering column.
²Turn the ignition switch on and access the ªmis-
cellaneousº screen.
²Select ªre-learn cam/crankº option and follow
directions on DRB screen.
WATER PUMP INLET TUBE
The inlet tube connects the water pump to the
radiator and heater core. This tube is sealed by a
O-ring and held in place by fasteners to the block.
REMOVAL
CAUTION: Do not use any sharp tools to remove
hoses from inlet tube. This may cause the tube to
leak.
(1) Drain cooling system. Refer to procedure out-
lined in this section.
(2) Remove upper radiator hose to access the hose
connections at the inlet tube.
(3) Remove lower radiator hose and heater hose
from the inlet tube (Fig. 16).
(4) Remove the two fasteners that hold the inlet
tube to the block and one fastener that holds the
intake manifold to inlet tube.
(5) Rotate tube while removing the tube from the
engine block (Fig. 17).
INSTALLATION
(1) Inspect the O-ring for damage before installing
the tube into the cylinder block (Fig. 17).
(2) Lube O-ring with coolant and install into the
cylinder block opening.
(3) Install two fasteners to the engine block and
the one fastener to the intake manifold. Tighten fas-
teners to 12 N´m (105 in. lbs.).
(4) Connect lower radiator hose and heater hose to
inlet tube.
(5) Install upper radiator hose.
(6) Fill cooling system. Refer to procedure outlined
in this section.
(7) Pressure system to 104 kPa (15 psi) to check
for leaks.
ENGINE THERMOSTAT
REMOVAL
(1) Drain cooling system to the thermostat level or
below.(2) Remove coolant recovery system (CRS) hose
and thermostat/engine outlet connector bolts (Fig. 18)
or (Fig. 19).
(3) Remove thermostat an O-ring assembly, and
clean sealing surfaces.
INSTALLATION
(1) Place the new thermostat assembly into the
thermostat housing/outlet connector. Align vent with
notch in cylinder head.
(2) Install thermostat housing/outlet connector
onto cylinder head and tighten bolts to 12.5 N´m (110
in. lbs.). Connect the coolant recovery system (CRS)
hose.
(3) Refill cooling system (seeRefilling System).
Fig. 16 Water Pump Inlet Tube Hose Connections
Fig. 17 Water Pump Inlet Tube
7 - 18 COOLINGPL
REMOVAL AND INSTALLATION (Continued)

RADIATOR
REMOVAL
WARNING: DO NOT REMOVE THE CYLINDER
BLOCK PLUG OR THE RADIATOR DRAINCOCK
WITH THE SYSTEM HOT AND UNDER PRESSURE
BECAUSE SERIOUS BURNS FROM COOLANT CAN
OCCUR.
(1) Disconnect negative battery cable from battery.
(2) Drain cooling system. Refer to Cooling System
Draining in this section.
(3) Remove engine air inlet duct.
(4) Remove upper radiator hose from the radiator.
(5) Disconnect and cap automatic transmission
hoses, if equipped.
(6) Remove radiator to battery strut (Fig. 20) and
ground strap.
(7) For vehicles equipped with dual fans: Remove
the battery and battery tray.(8) Remove fan module assembly by disconnecting
fan motor electrical connector.
(9) Remove fan shroud retaining screws, located on
the top of the shroud (Fig. 21). Lift shroud up and
out of bottom shroud attachment clips separating
shroud from radiator. For dual fan applications the
left fan module may be removed first, then the right
side module last. Fan damage should always be
avoided.
(10) Remove the lower radiator hose.
(11) Remove upper radiator isolator bracket
mounting screws (Fig. 20). Disconnect the engine
block heater wire if equipped.
(12) Remove the air conditioning condenser attach-
ing screws located at the front of the radiator, if
equipped (Fig. 22), then lean condenser forward.
NOTE: It is not necessary to discharge the air con-
ditioning system to remove the radiator.
(13) Radiator can now be lifted free from engine
compartment.Care should be taken not to dam-
age radiator cooling fins or water tubes during
removal.
INSTALLATION
(1) Slide radiator down into position behind radia-
tor support (yoke).
(2) Attach air conditioning condenser to radiator, if
equipped (Fig. 22), with four mounting screws and
tighten to 5.4 N´m (50 in. lbs.). Then seat the assem-
bly lower rubber isolators into the mounting holes
provided in the lower crossmember.
(3) Tighten radiator isolator mounting bracket
screws to 10 N´m (90 in. lbs.). The radiator should
have clearance to move up approximately 5 to 8 mm
(0.25 in.) after assembled.
(4) Install lower radiator hose. Align the hose and
position the clamp so it will not interfere with engine
components.
Fig. 18 Thermostat/Engine Outlet ConnectorÐSOHC
Fig. 19 Thermostat/Engine Outlet ConnectorÐDOHC
Fig. 20 Radiator Mounting
PLCOOLING 7 - 19
REMOVAL AND INSTALLATION (Continued)

(5) Connect automatic transmission hoses, if
equipped. Tighten hose clamps to 4 N´m (35 in. lbs.).
(6) Slide fan module down into clip(s) on lower
radiator flange (Fig. 21). For dual fan application
install the right fan module first and then the left
fan module. Install retaining screws and tighten to
7.5 N´m (65 in. lbs.).
(7) Connect the cooling fan motor electrical connec-
tor(s).
(8) Install upper radiator hose. Align the hose and
position the clamp so they will not interfere with the
engine or the hood.
(9) For vehicles equipped with dual fans: Install
the battery tray and battery.
(10) Connect negative cable to battery.
(11) Fill cooling system with coolant. Refer to
Cooling System Refillingin this section.
(12) Operate engine until it reaches normal oper-
ating temperature. Check cooling system and auto-
matic transmission for correct fluid levels.
RADIATOR DRAINCOCK
REMOVAL
(1) Turn the drain cock stem counterclockwise to
unscrew the stem. When the stem is unscrewed to
the end of the threads, pull the stem (Fig. 23) from
the radiator tank.
INSTALLATION
(1) Push the draincock assembly body into the
tank opening.
(2) Tighten the draincock stem by turning clock-
wise to 2.0-2.7 N´m (18-25 in. lbs.).
RADIATOR FANS AND MOTOR
All models use a single speed electric motor driven
cooling system fans. The fan modules includes a
motor, fan blade, and support shroud. The module is
fastened to the radiator by screws.
REMOVAL FAN MODULE
(1) Disconnect fan motor leads from module.
(2) Remove fan module fasteners from radiator
(Fig. 24).
FAN BLADE
There are no repairs to be made to the fan. If the
fan is warped, cracked, or otherwise damaged, it
Fig. 21 Fan Module Mounting
Fig. 22 A/C Condenser to Radiator Mounting Screws
Fig. 23 Draincock
Fig. 24 Servicing Fan Module
7 - 20 COOLINGPL
REMOVAL AND INSTALLATION (Continued)

must be replaced withonlythe recommended part
for adequate strength, performance and safety.
(1) To remove fan from motor shaft, bench support
the motor and motor shaft, while removing the fan
retaining clip, so that the shaft and motor will not be
damaged by excessive force.Surface burr removal
may be required to remove fan from motor
shaft (Fig. 25).Do not permit the fan blades to
touch the bench.
(2) To install fan on motor shaft, slide the fan over
shaft. Support motor and shaft as above while
installing fan retaining clip.
INSTALLATION FAN MODULE
(1) Install module to radiator. Torque shroud to
radiator fasteners to 7.5 N´m (65 in. lbs.).
(2) Connect fan motor lead.For wiring diagrams
of fan motor systems Refer to 8W Wiring Dia-
grams.
ELECTRIC FAN MOTORÐSERVICE
WARNING: Do not disassemble the fan motor from
the support bracket.
Electric fan motor is serviced as an assembly with
the fan module.
FAN SHROUD
Some fan shrouds are equipped with flapped doors
to prevent the shroud from restricting air flow at
high speeds.
All vehicles have fan shrouds to improve fan air
flow efficiency.
The shroud supports the electric fan motor and
fan. For removal and installation procedures, refer to
radiator removal in this Section.
ENGINE BLOCK HEATER
REMOVAL
(1) Drain coolant from radiator and cylinder block.
Refer to Cooling System Drain, Clean, Flush and
Refill of this section for procedure.
(2) Detach power cord plug from heater.
(3) Loosen screw in center of heater. Remove
heater assembly.
INSTALLATION
(1) Thoroughly clean core hole and heater seat.
(2) Insert heater assembly with element loop posi-
tionedupward.
(3) With heater seated, tighten center screw
securely to assure a positive seal.
(4) Fill cooling system with coolant to the proper
level, vent air, and inspect for leaks. Pressurize sys-
tem with Radiator Pressure Tool before looking for
leaks.
ACCESSORY DRIVE BELTS
AIR CONDITIONING COMPRESSOR AND
POWER STEERING PUMP
(1) Loosen the power steering pump locking bolts
A and B and pivot bolt C (Fig. 26) to remove and
install belt and/or adjust belt tension.
(2) Using a 1/2º breaker bar, adjust belt tension by
applying torque to the square D hole on the power
steering pivot bracket. Adjust tension to specification
given in Belt Tension Chart.
(3) Tighten in order, first tighten locking bolt A to
27 N´m (20 ft. lbs.) then, bolt B to 27 N´m (20 ft. lbs.)
Then pivot bolt C to 54 N´m (40 ft. lbs.).
GENERATOR BELT
(1) Loosen pivot bolt E then locking nut F and
adjusting bolt G (Fig. 27) to remove and install belt
and/or adjust belt tension.
(2) Tighten adjusting bolt G, adjust belt tension to
specification shown in Belt Tension Chart.
(3) Tighten pivot bolt E to 54 N´m (40 ft. lbs.).
Locking nut F to 54 N´m (40 ft. lbs.).
CLEANING AND INSPECTION
WATER PUMP
Replace water pump body assembly if it has any of
these defects:
(1) Cracks or damage on the body.
(2) Coolant leaks from the shaft seal, evident by
coolant traces on the pump body.
(3) Loose or rough turning bearing.
(4) Impeller rubs either the pump body or the
engine block.
Fig. 25 Servicing Radiator Fan
PLCOOLING 7 - 21
REMOVAL AND INSTALLATION (Continued)

Cooling System). Run engine with radiator cap
installed until upper radiator hose is hot. Stop
engine and drain water from system. If water is
dirty, fill, run and drain system again until water
runs clear.
RADIATOR FLUSHING
Drain cooling system and remove radiator hoses
from engine. Install suitable flushing gun in radiator
lower hose. Fill radiator with clean water and turn
on air in short blasts.
CAUTION: Internal radiator pressure must not
exceed 138 kPa (20 psi) as damage to radiator may
result. Continue this procedure until water runs
clear.
ENGINE FLUSHING
Drain radiator (see:Cooling System Draining)
and remove hoses from radiator. Remove engine ther-
mostat and reinstall thermostat housing. A gasket
may be needed to seal the housing to cylinder head
because the seal is part of thermostat. Install suit-
able flushing gun to thermostat housing hose. Turn
on water, and when engine is filled, turn on air, but
no higher than 138 kPa (20 psi) in short blasts. Allowengine to fill between blasts of air. Continue this pro-
cedure until water runs clean. Install thermostat and
fill cooling system. Refer to (Cooling System Refill-
ing) for procedure.
REVERSE FLUSHING
Reverse flushing of the cooling system is the forc-
ing of water through the cooling system, using air
pressure in a direction opposite to that of the normal
flow of water. This is only necessary with dirty sys-
tems and evidence of partial plugging.
CHEMICAL CLEANING
One type of corrosion encountered with aluminum
cylinder heads is aluminum hydroxide deposits. Cor-
rosion products are carried to the radiator and depos-
ited when cooled off. They appear as dark grey when
wet and white when dry. This corrosion can be
removed with a two part cleaner (oxalic acid and
neutralizer) available in auto parts outlets. Follow
manufacturers directions for use.
ADJUSTMENTS
PROPER BELT TENSION
Satisfactory performance of the belt driven accesso-
ries depends on belt condition and proper belt ten-
sion. Refer to Accessory Drive Belt Inspection in this
section. There are two belt tensioning methods given
in order of preference:
²Belt tension gauge method.
²Torque equivalent method.
The belt tension gauge method usually requires the
vehicle to be raised on a hoist and the splash shield
removed.
TORQUE EQUIVALENT METHOD
Adjustable accessory brackets provided with a 13
mm (1/2 in.) square hole for a torque wrench can use
an equivalent torque value for belt adjustment.
Equivalent torque values for adjusting these acces-
sory drive belts are specified in the Belt Tension
Chart.
Fig. 29 Cooling System Pressure Cap
BELT TENSION CHART
ACCESSORY
DRIVE BELTGAUGE TORQUE
Power Steering
Pump and A/C
CompressorNew 135 lb. 121 N´m (90 ft.
lbs.)
Used 100 lb. 81 N´m 60 ft.
lbs.)
Generator New 135 lb. Gauge
adjustment
method only Used 100 lb.
PLCOOLING 7 - 23
CLEANING AND INSPECTION (Continued)

BELT TENSION GAUGE METHOD
NOTE: Use belt tensioning Special Tool Kit C-4162
for:
²For conventional belts and Poly-V-belts.
Adjust the belt tension for aNeworUsedbelt as
prescribed in the Belt Tension Chart.
SPECIFICATIONS
COOLING SYSTEM CAPACITYTORQUE
DESCRIPTION....................TORQUE
A/C Condenser to Radiator
Screws.....................7.2 N´m (65 in. lbs.)
Fan Module to Radiator
Screws.....................7.2 N´m (65 in. lbs.)
Fan Motor to Shroud (A/C equipped)
Screws.....................3.8 N´m (34 in. lbs.)
Fan Motor to Shroud (Non A/C equipped)
Screws.....................2.3 N´m (20 in. lbs.)
Radiator (Cooling Module) to Body
Screws.....................10N´m(90in.lbs.)
Thermostat Housing/Water Outlet Connector
Screws....................12N´m(105 in. lbs.)
Upper Radiator Crossmember
Bolts......................28N´m(250 in. lbs.)
Water Pump to Engine Block
Bolts......................12N´m(105 in. lbs.)
Water Pump Inlet Tube to Engine Block
Bolts......................12N´m(105 in. lbs.)
SPECIAL TOOLS
COOLING
BELT TENSION CHART
ACCESSORY DRIVE
BELTGAUGE
Power Steering Pump
and A/C CompressorNew 135 lb.
Used 100 lb.
Generator New 135 lb.
Used 100 lb.
COOLING SYSTEM CAPACITY CHART
7.00 LITERS 7.40 QTS.
CAPACITY, Includes Heater and Coolant Reserve
System
Accessory Drive Belt Tension Gauge C-4162
7 - 24 COOLINGPL
ADJUSTMENTS (Continued)

WARNING: TO PROTECT THE HANDS FROM BAT-
TERY ACID, A SUITABLE PAIR OF HEAVY DUTY
RUBBER GLOVES, NOT THE HOUSEHOLD TYPE,
SHOULD BE WORN WHEN REMOVING OR SERVIC-
ING A BATTERY. SAFETY GLASSES ALSO SHOULD
BE WORN.
(4) Squeeze the sides of the tube at the pull strap
lock tabs and push down through the hole in the bat-
tery tray (Fig. 19). DO NOT push directly down on
the pull strap itself.
(5) Remove the tube from the radiator closure
panel by squeezing the lock tabs and pushing from
the front side (Fig. 16).INSTALLATION
For installation reverse above procedures. Ensure
that the lock tabs are properly seated in the radiator
panel and to the bottom of battery tray (Fig. 19).
Ensure that the tube opening is properly aligned
with hole before pulling on strap.
SPECIFICATIONS
BATTERY SPECIFICATIONS
COLD CRANK RATING
The current battery can deliver for 30 seconds and
maintain a terminal voltage of 7.2 volts or greater at
±18É C (0É F).
RESERVE CAPACITY RATING
The length of time a battery can deliver 25 amps
and maintain a minimum terminal voltage of 10.5
volts at 27ÉC (80ÉF).
TORQUE
DESCRIPTION TORQUE
Battery Hold Down Bolt
Clamp Bolt.................9N´m(75in.lbs.)
Fig. 19 Air Inlet Tube Pull Strap
Load Test Cold
CrankingReserve
(Amps) Rating @
-18ÉC (0ÉF)Capacity
225 Amp 450 Amp 85 Minutes
8A - 10 BATTERYPL
REMOVAL AND INSTALLATION (Continued)

train Control Module (PCM) with an input signal
(voltage). The signal represents throttle blade posi-
tion. As the position of the throttle blade changes,
the resistance of the TPS changes.
The PCM supplies approximately 5 volts to the
TPS. The TPS output voltage (input signal to the
powertrain control module) represents throttle blade
position. The TPS output voltage to the PCM varies
from approximately 0.38 volts to 1.2 volts at mini-
mum throttle opening (idle) to a maximum of 3.1
volts to 4.4 volts at wide open throttle.
Along with inputs from other sensors, the PCM
uses the TPS input to determine current engine oper-
ating conditions. The PCM also adjusts fuel injector
pulse width and ignition timing based on these
inputs.
IGNITION SWITCH
In the RUN position, the ignition switch connects
power from the Power Distribution Center (PDC) to a
30 amp fuse in the fuse block, back to a bus bar in
the PDC. The bus bar feeds circuits for the Power-
train Control Module (PCM), duty cycle purge sole-
noid, EGR solenoid, and ABS system. The bus bar in
the PDC feeds the coil side of the radiator fan relay,
A/C compressor clutch relay, and the fuel pump relay.
It also feeds the Airbag Control Module (ACM)
LOCK KEY CYLINDER
The lock cylinder is inserted in the end of the
housing opposite the ignition switch. The ignition key
rotates the cylinder to 5 different detents (Fig. 16):
²Accessory
²Off (lock)
²Unlock
²On/Run
²Start
IGNITION INTERLOCK
All vehicles equipped with automatic transaxles
have an interlock system. The system prevents shift-
ing the vehicle out of Park unless the ignition lock
cylinder is in the Off, Run or Start position. In addi-
tion, the operator cannot rotate the key to the lock
position unless the shifter is in the park position. On
vehicles equipped with floor shift refer to Group 21 -
Transaxle for Automatic Transmission Shifter/Igni-
tion Interlock.
DIAGNOSIS AND TESTING
TESTING FOR SPARK AT COILÐ2.0/2.4L
WARNING: THE DIRECT IGNITION SYSTEMS GEN-
ERATES APPROXIMATELY 40,000 VOLTS. PER-
SONAL INJURY COULD RESULT FROM CONTACT
WITH THIS SYSTEM.
The coil pack contains independent coils. Each coil
must be checked individually.
CAUTION: Spark plug wire damage may occur if
the spark plug is moved more than 1/4 inch away
from the engine ground.
CAUTION: Do not leave any one spark plug cable
disconnected any longer than 30 seconds or possi-
ble heat damage to catalytic converter will occur.
CAUTION: Test must be performed at idle and in
park only with the parking brake on.
NOTE: New isolated engine valve cover may not
provide adequate ground. Use engine block as
engine ground.
Fig. 15 MAP/IAT sensorÐDOHCFig. 16 Ignition Lock Cylinder Detents
PLIGNITION SYSTEM 8D - 7
DESCRIPTION AND OPERATION (Continued)