key DODGE NEON 2000 Service Repair Manual

BATTERY VOLTAGEÐPCM INPUT
OPERATION
In order for the PCM to operate, it must be sup-
plied with battery voltage and ground. The PCM
monitors the direct battery feed input to determine
battery charging rate and to control the injector ini-
tial opening point. It also has back-up RAM memory
used to store Diagnostic Trouble Codes (supply work-
ing DTCs). Direct battery feed is also used to perform
key-OFF diagnostics and to supply working voltage
to the controller for OBDII.
The five and eight volt regulators are protected
from shorts to ground. This protection allows diag-
nostics to be performed should the five volt power
supply become shorted to ground at any of the sen-
sors. A short to ground in the five volt power supply
will cause a ªno-startº situation. There is a Diagnos-
tic Trouble Code (DTC) if the five-volt power supply
becomes shorted to ground. Refer to the Diagnostic
Procedures Manual for more details on any on-board
diagnostic information.
If battery voltage is low the PCM will increase
injector pulse width (period of time that the injector
is energized).
The direct battery feed to the PCM is used as a
reference point to sense battery voltage.
Effect on Fuel Injectors
Fuel injectors are rated for operation at a specific
voltage. If the voltage increases, the plunger will
open faster and further (more efficient) and con-
versely, if voltage is low the injector will be slow to
open and will not open as far. Therefore, if sensed
battery voltage drops, the PCM increases injector
pulse-width to maintain the same volume of fuel
through the injector.
Charging
The PCM uses sensed battery voltage to verify that
target charging voltage (determined by Battery Tem-
perature Sensor) is being reached. To maintain the
target charging voltage, the PCM will full field the
generator to 0.5 volt above target then turn OFF to
0.5 volt below target. This will continue to occur up
to a 100 Hz frequency, 100 times per second.
BRAKE SWITCHÐPCM INPUT
OPERATION
When the brake switch is activated, the PCM
receives an input indicating that the brakes are
being applied. The brake switch is mounted on the
brake pedal support bracket.
CAMSHAFT POSITION SENSORÐPCM INPUT
DESCRIPTION
The camshaft position sensor attaches to the rear
of the cylinder head. The PCM determines fuel injec-
tion synchronization and cylinder identification from
inputs provided by the camshaft position sensor (Fig.
3) and crankshaft position sensor. From the two
inputs, the PCM determines crankshaft position.
OPERATION
The PCM sends approximately 8 volts to the hall
affect sensor. This voltage is required to operate the
hall effect chip and the electronics inside the sensor.
A ground for the sensor is provided through the sen-
sor return circuit. The input to the PCM occurs on a
5 volt output reference circuit.
A target magnet attaches to the rear of the cam-
shaft and indexes to the correct position. The target
magnet has four different poles arranged in an asym-
metrical pattern (Fig. 4). As the target magnet
rotates, the camshaft position sensor senses the
change in polarity (Fig. 5). The sensor output switch
switches from high (5.0 volts) to low (0.5 volts) as the
target magnet rotates. When the north pole of the
target magnet passes under the sensor, the output
switches high. The sensor output switches low when
the south pole of the target magnet passes under-
neath.
The sensor also acts as a thrust plate to control
camshaft endplay.
Fig. 3 Camshaft Position SensorÐSOHC
14 - 28 FUEL SYSTEMPL
DESCRIPTION AND OPERATION (Continued)

OPERATION
The combination coolant temperature sensor has
two elements. One element supplies coolant temper-
ature signal to the PCM. The other element supplies
coolant temperature signal to the instrument panel
gauge cluster. The PCM determines engine coolant
temperature from the coolant temperature sensor.
As coolant temperature varies the coolant temper-
ature sensors resistance changes resulting in a differ-
ent input voltage to the PCM and the instrument
panel gauge cluster.When the engine is cold, the PCM will provide
slightly richer air- fuel mixtures and higher idle
speeds until normal operating temperatures are
reached.
The PCM has a dual temperature range program
for better sensor accuracy at cold temperatures. At
key-ON the PCM sends a regulated five volt signal
through a 10,000 ohm resistor to the sensor. When
the sensed voltage reaches approximately 1.25 volts
the PCM turns on the transistor. The transistor con-
nects a 1,000 ohm resistor in parallel with the 10,000
ohm resistor. With this drop in resistance the PCM
recognizes an increase in voltage on the input circuit.
FUEL LEVEL SENSORÐPCM INPUT
DESCRIPTION
The fuel gauge level sending unit is attached to the
fuel pump module.
OPERATION
The fuel level sensor (fuel gauge sending unit)
sends a signal to the PCM to indicate fuel level. The
purpose of this feature is to prevent a false setting of
misfire and fuel system monitor trouble codes if the
fuel level is less than approximately 15 percent of its
rated capacity. It is also used to send a signal for fuel
gauge operation via the PCI bus circuits.
Fig. 9 Timing Reference Notches
1 ± MACHINED NOTCHES
2 ± CRANKSHAFT POSITION SENSOR
Fig. 10 Engine Coolant Temperature SensorÐSOHC
1 ± ENGINE COOLANT TEMPERATURE SENSOR
2 ± CAMSHAFT POSITION SENSOR
PLFUEL SYSTEM 14 - 31
DESCRIPTION AND OPERATION (Continued)

OPERATION
When the knock sensor detects a knock in one of
the cylinders, it sends an input signal to the PCM. In
response, the PCM retards ignition timing for all cyl-
inders by a scheduled amount.
Knock sensors contain a piezoelectric material
which sends an input voltage (signal) to the PCM. As
the intensity of the engine knock vibration increases,
the knock sensor output voltage also increases.
The voltage signal produced by the knock sensor
increases with the amplitude of vibration. The PCM
receives as an input the knock sensor voltage signal.
If the signal rises above a predetermined level, the
PCM will store that value in memory and retard
ignition timing to reduce engine knock. If the knock
sensor voltage exceeds a preset value, the PCM
retards ignition timing for all cylinders. It is not a
selective cylinder retard.
The PCM ignores knock sensor input during engine
idle conditions. Once the engine speed exceeds a
specified value, knock retard is allowed.
Knock retard uses its own short term and long
term memory program.
Long term memory stores previous detonation
information in its battery-backed RAM. The maxi-
mum authority that long term memory has over tim-
ing retard can be calibrated.
Short term memory is allowed to retard timing up
to a preset amount under all operating conditions (as
long as rpm is above the minimum rpm) except WOT.
The PCM, using short term memory, can respond
quickly to retard timing when engine knock is
detected. Short term memory is lost any time the
ignition key is turned off.
MANIFOLD ABSOLUTE PRESSURE (MAP)
SENSORÐPCM INPUT
DESCRIPTION
The MAP sensor mounts to the intake manifold
(Fig. 17).
OPERATION
The PCM supplies 5 volts direct current to the
MAP sensor. The MAP sensor converts intake mani-
fold pressure into voltage. The PCM monitors the
MAP sensor output voltage. As vacuum increases,
MAP sensor voltage decreases proportionately. Also,
as vacuum decreases, MAP sensor voltage increases
proportionately.
At key on, before the engine is started, the PCM
determines atmospheric air pressure from the MAP
sensor voltage. While the engine operates, the PCM
determines intake manifold pressure from the MAP
sensor voltage. Based on MAP sensor voltage andinputs from other sensors, the PCM adjusts spark
advance and the air/fuel mixture.
If the PCM considers the MAP Sensor information
inaccurate, the PCM moves into ªlimp-inº mode.
When the MAP Sensor is in limp-in, the PCM limits
the engine speed as a function of the Throttle Posi-
tion Sensor (TPS) to between 1500 and 4000 rpm. If
the MAP Sensor sends realistic signals once again,
the PCM moves out of limp-in and resumes using the
MAP values.
During limp-in a DTC is set and the MIL illumi-
nates.
POWER STEERING PRESSURE SWITCHÐPCM
INPUT
DESCRIPTION
A pressure sensing switch is located on the power
steering gear.
OPERATION
The switch (Fig. 18) provides an input to the PCM
during periods of high pump load and low engine
RPM; such as during parking maneuvers.
When power steering pump pressure exceeds 2758
kPa (400 psi), the switch is open. The PCM increases
idle air flow through the IAC motor to prevent
engine stalling. The PCM sends 12 volts through a
resister to the sensor circuit to ground. When pump
pressure is low, the switch is closed.
SENSOR RETURNÐPCM INPUT
OPERATION
The sensor return circuit provides a low electrical
noise ground reference for all of the systems sensors.
Fig. 17 Manifold Absolute Pressure Sensor
PLFUEL SYSTEM 14 - 35
DESCRIPTION AND OPERATION (Continued)

stroke. One plug is the cylinder under compression,
the other cylinder fires on the exhaust stroke. Coil
number one fires cylinders 1 and 4. Coil number two
fires cylinders 2 and 3. The PCM determines which
of the coils to charge and fire at the correct time.
The Auto Shutdown (ASD) relay provides battery
voltage to the ignition coil. The PCM provides a
ground contact (circuit) for energizing the coil. When
the PCM breaks the contact, the energy in the coil
primary transfers to the secondary causing the
spark. The PCM will de-energize the ASD relay if it
does not receive the crankshaft position sensor and
camshaft position sensor inputs. Refer to Auto Shut-
down (ASD) RelayÐPCM Output in this section for
relay operation.
Base timing is non-adjustable, but is set from the
factory at approximately 10ÉBTDC when the engine
is warm and idling.
There is an adaptive dwell strategy that runs dwell
from 4 to 6 msec when rpm is below 3,000 and bat-
tery voltage is 12-14 volts. During cranking, dwell
can be as much as 200 msec. The adaptive dwell is
driven by the sensed current flow through the injec-
tor drivers. Current flow is limited to 8 amps.
The low resistance of the primary coils can allow
current flow in excess of 15 amps. The PCM has a
current sensing device in the coil output circuit. As
dwell time starts, the PCM allows current to flow.
When the sensing device registers 8 amps, the PCM
begins to regulate current flow to maintain and not
exceed 8 amps through the remainder of the dwell
time. This prevents the PCM from being damaged by
excess current flow.
MALFUNCTION INDICATOR (CHECK ENGINE)
LAMPÐPCM OUTPUT
OPERATION
The PCM supplies the malfunction indicator (check
engine) lamp on/off signal to the instrument panel
through the PCI Bus. The PCI Bus is a communica-
tions port. Various modules use the PCI Bus to
exchange information.
The Check Engine lamp comes on each time the
ignition key is turned ON and stays on for 3 seconds
as a bulb test.
The Malfunction Indicator Lamp (MIL) stays on
continuously, when the PCM has entered a Limp-In
mode or identified a failed emission component. Dur-
ing Limp-in Mode, the PCM attempts to keep the
system operational. The MIL signals the need for
immediate service. In limp-in mode, the PCM com-
pensates for the failure of certain components that
send incorrect signals. The PCM substitutes for the
incorrect signals with inputs from other sensors.
If the PCM detects active engine misfire severe
enough to cause catalyst damage, it flashes the MIL.
At the same time the PCM also sets a Diagnostic
Trouble Code (DTC).
For signals that can trigger the MIL (Check
Engine Lamp) refer to the On-Board Diagnos-
tics section.
SPEED CONTROLÐPCM INPUT
OPERATION
The speed control system provides five separate
voltages (inputs) to the Powertrain Control Module
(PCM). The voltages correspond to the ON, OFF,
SET, RESUME, CANCEL, and COAST.
The speed control ON voltage informs the PCM
that the speed control system has been activated.
The speed control SET voltage informs the PCM that
a fixed vehicle speed has been selected. The speed
control RESUME voltage indicates the previous fixed
speed is requested. The speed control CANCEL volt-
age tells the PCM to deactivate but retain set speed
in memory (same as depressing the brake pedal). The
speed control COAST voltage informs the PCM to
coast down to a new desired speed. The speed control
OFF voltage tells the PCM that the speed control
system has deactivated. Refer to the Speed Control
section for more speed control information.
SCI RECEIVEÐPCM OUTPUT
OPERATION
SCI Receive is the serial data communication
receive circuit for the DRB scan tool. The Powertrain
Fig. 27 Ignition Coil Pack
PLFUEL SYSTEM 14 - 41
DESCRIPTION AND OPERATION (Continued)

STEERING COLUMN
TABLE OF CONTENTS
page page
DESCRIPTION AND OPERATION
STEERING COLUMN......................29
STEERING COLUMN LOWER COUPLING......29
DIAGNOSIS AND TESTING
STEERING COLUMN......................30
STEERING COLUMN LOWER COUPLING......30
REMOVAL AND INSTALLATION
SERVICE WARNINGS AND CAUTIONS........31STEERING COLUMN......................31
STEERING COLUMN LOWER COUPLING......38
SPECIFICATIONS
STEERING COLUMN FASTENER TORQUE
SPECIFICATIONS.......................41
DESCRIPTION AND OPERATION
STEERING COLUMN
This vehicle is equipped with both tilt and non-tilt
steering columns. Both steering columns have been
designed to be serviced only as complete assemblies
if an internal component is found to be defective (Fig.
1). The shaft, bearings and upper coupling are all
serviced with the column.
The replaceable components on the steering col-
umn assembly are:
²the key cylinder
²the ignition switch
²the multi-function switch
²the clockspring²the trim shrouds
²the steering wheel
²the driver airbag module
These components can be serviced without removal
of the steering column from the vehicle. Refer to the
appropriate group and section of this service manual
for servicing these components separately.
STEERING COLUMN LOWER COUPLING
This vehicle uses a corrugated design lower cou-
pling to connect the steering column to the steering
gear (Fig. 2).
This coupling has a hollow corrugated tube that
allows the coupling to bend rather than collapse
when a vehicle is involved in a collision.
Fig. 1 Steering Column
1 ± UPPER MOUNTING NUTS
2 ± STEERING COLUMN
3 ± LOWER MOUNTING NUTS
Fig. 2 Steering Column Lower Coupling
1 ± FLEX JOINT
2 ± SEAL COLLAR SEALING SURFACE
3 ± TO STEERING COLUMN
4 ± CORRUGATED TUBE SECTION
5 ± TO STEERING GEAR
PLSTEERING 19 - 29

CAUTION: When installing a wheel puller on the
steering wheel, be sure the puller bolts are fully
seated in the threaded holes on the steering wheel.
If the bolts are not fully seated in the threaded
holes, the threads may be stripped out of the steer-
ing wheel when attempting to remove the steering
wheel. Also, thread the retaining nut back on the
end of the shaft until it is flush with the shaft end to
avoid damage to the shaft threads by the wheel
puller.
(12) Install a steering wheel puller on the steering
wheel (Fig. 8).
CAUTION: Do not bump or hammer on steering
wheel or steering column shaft when removing
steering wheel from steering column.
(13) Holding the steering wheel firmly in the
staight-ahead position, remove steering wheel from
the steering column shaft using the puller.
(14) Remove the ignition key from the ignition key
cylinder.
(15) Remove the two screws attaching the lower
shroud to the steering column and upper shroud (Fig.
9). After removing the screws, unclip the shouds from
each other by applying hand pressure along the
seams where the shrouds connect on the sides, then
remove the lower shroud from the upper shroud and
column. Remove the upper shroud from the steering
column.
(16) At the base of the column, remove the steer-
ing column coupling retainer pin, back off the pinch
bolt nut, and remove the steering column coupling
pinch bolt (Fig. 10) (the pinch bolt nut is caged to the
coupling and is not removable). Separate the upper
and lower steering column couplings.(17) If the vehicle is equipped with a automatic
transaxle, disconnect the automatic transaxle igni-
tion interlock cable from the steering column.
Depress the tab on top of the cable connector and
remove the cable from the back side of the steering
column ignition cylinder housing (Fig. 11).
(18) Remove the two lower mounting nuts attach-
ing the steering column to the instrument panel (Fig.
12).
(19) Remove the two upper mounting nuts attach-
ing the steering column to the instrument panel (Fig.
12).
Fig. 8 Steering Wheel Puller Installed
1 ± STEERING WHEEL
2 ± STEERING WHEEL PULLER
Fig. 9 Steering Column Shrouds
1 ± UPPER SHROUD
2 ± LOWER SHROUD
3 ± MOUNTING SCREWS
Fig. 10 Steering Column Couplings
1 ± STEERING COLUMN UPPER COUPLING
2 ± PINCH BOLT
3 ± STEERING COLUMN LOWER COUPLING
4 ± BRAKE PEDAL
5 ± NUT
6 ± RETAINER PIN
PLSTEERING 19 - 33
REMOVAL AND INSTALLATION (Continued)

(20) Lower the steering column away from the
instrument panel.
(21) Disconnect the wiring harness electrical con-
nector from the clockspring (Fig. 13).
(22) Disconnect the wiring harness electrical con-
nectors from the multi-function switch, windshield
wiper switch, and ignition switch (Fig. 14).(23) If the vehicle is equipped with a Sentry Key
Immobilizer Module (SKIM), disconnect its electrical
connector (Fig. 15).
(24) Remove the steering column from the vehicle.
(25) If the steering column is being replaced, per-
form the following:
(a) Remove the ignition key cylinder from the
steering column. To do this, insert the key and
turn the ignition key cylinder to the ON position.
Next, depress the retaining tab and remove the
Ignition key cylinder by pulling the key and cylin-
der straight out of the column together (Fig. 16).
Fig. 11 Interlock Cable
1 ± IGNITION SWITCH
2 ± CLIP
3 ± INTERLOCK CABLE
4 ± BTSI SOLENOID
Fig. 12 Steering Column Mounting Nuts
1 ± UPPER MOUNTING NUTS
2 ± STEERING COLUMN
3 ± LOWER MOUNTING NUTS
Fig. 13 Clockspring Electrical Connector
1 ± STEERING COLUMN
2 ± CLOCKSPRING
3 ± CLOCKSPRING ELECTRICAL CONNECTOR
4 ± IGNITION SWITCH ELECTRICAL CONNECTOR
Fig. 14 Electrical Connectors
1 ± MULTI-FUNCTION SWITCH ELECTRICAL CONNECTOR
2 ± WINDSHIELD WIPER SWITCH ELECTRICAL CONNECTOR
3 ± IGNITION SWITCH ELECTRICAL CONNECTOR
19 - 34 STEERINGPL
REMOVAL AND INSTALLATION (Continued)

(b) Disengage the latch hooks on the back of the
clockspring by lifting the clockspring slightly to
clear the column housing with the top latch hook.
Next, lower the clockspring slightly to do the same
for the lower latch hook (Fig. 17). Remove the
clockspring from the column.
(c) Remove the two screws securing the multi-
function/windshield wiper switch to the steering
column (Fig. 18). Pull the switch straight away
from the column to remove it.
(d) If the column is equipped with a SKIM,
remove the module from the column by removing
the two mounting screws and sliding the SKIM off
the non-halo trim ring (Fig. 19).
(e) Remove the non-halo trim ring from the col-
umn by unclipping it from the ignition cylinder
housing (Fig. 19).
(f) Remove the ignition switch from the steering
column by first removing the mounting screw (Fig.
20). Once the screw is removed, pull the switch
straight out away from the column ignition cylin-
der housing.
INSTALLATION
(1) If the steering column is being replaced, per-
form the following on the column before installing it
on the vehicle:
(a) Ensure the ignition switch is positioned in
the ON position.
(b) Install the ignition switch on the steering
column by pushing the tapered end onto the shaft
and steering column ignition cylinder housing.
Install the screw securing the switch to the column
(Fig. 20).(c) Install the non-halo trim ring on the column
until its tabs snap into place on the ignition cylin-
der housing (Fig. 19).
(d) If the column is equipped with a Sentry Key
Immobilizer Module (SKIM), install the module on
the column by sliding the module onto the non halo
trim ring and installing the two mounting screws
(Fig. 19). Tighten the mounting screws to a torque
of 3 N´m (25 in. lbs.).
(e) Position the multi-function/windshield wiper
switch in onto the top of the column and install the
two screws securing the switch in place (Fig. 18).
(f) Place the clockspring onto the end of the col-
umn engaging the clockspring latch hooks into the
column (Fig. 17).
Fig. 15 SKIM Electrical Connector
1 ± STEERING COLUMN
2 ± SKIM ELECTRICAL CONNECTOR
3 ± SKIM
Fig. 16 Ignition Key Cylinder Retaining Tab
1 ± IGNITION KEY
2 ± RETAINING TAB
3 ± STEERING COLUMN
Fig. 17 Clockspring Latch Hooks
1 ± CLOCKSPRING
2 ± LATCH HOOKS
3 ± STEERING COLUMN
PLSTEERING 19 - 35
REMOVAL AND INSTALLATION (Continued)

(g) Install the ignition key cylinder in the steer-
ing column. To do this, first position the key cylin-
der in the ON position (with the key in it) so the
retaining tab can be depressed. Push key cylinder
into the column ignition cylinder housing until the
retaining tab locks into place (Fig. 16).
NOTE: When installing a tilt column, do not release
the tilt lever from the locked position until after the
column is installed on the instrument panel.
(2) Install the steering column into steering col-
umn access opening in the lower instrument panel.
(3) If the vehicle is equipped with a SKIM, Con-
nect its wiring harness electrical connector (Fig. 15).(4) Connect the wiring harness electrical connec-
tors to the multi-function switch, windshield wiper
switch, and ignition switch (Fig. 14).
(5) Connect the wiring harness electrical connector
to the clockspring (Fig. 13).
(6) Align the slots in the mounting brackets on the
steering column with the studs in the instrument
panel (Fig. 12) Attach the column to the instrument
panel by first installing the two upper mounting nuts
(Do not completely tighten the two upper mounting
nuts at this time). Next, install the two lower mount-
ing nuts. Tighten all four mounting nuts to a torque
of 17 N´m (150 in. lbs.).
(7) If the vehicle is equipped with an automatic
transaxle, connect the automatic transaxle ignition
interlock cable to the steering column by pushing the
end of the cable into the back side of the ignition cyl-
inder housing until it snaps into place (Fig. 11).
(8) Position the steering column shaft in the cor-
rect position for mounting to the lower coupling. To
do this, turn the steering wheel end of the shaft until
the missing spline area on that end of the shaft faces
straight up.
(9) Verify the front wheels of vehicle are in the
STRAIGHT-AHEAD position.
NOTE: Do not tighten the coupling pinch bolt any-
time the vehicle is not at curb riding height. It may
cause unwanted conditions within the steering col-
umn if the vehicle is suspended in any manner
when the pinch bolt is tightened.
(10) Reconnect the steering column lower coupling
to the steering column upper coupling (Fig. 10).
Install the coupling pinch bolt an tighten the pinch
Fig. 18 Multi-function/Wiper Switch Mounting
1 ± MOUNTING SCREWS
2 ± MULTI-FUNCTION/WINDSHIELD WIPER SWITCH ASSEMBLY
Fig. 19 SKIM Mounting
1 ± HALO TRIM RING
2 ± MOUNTING SCREWS
3 ± SKIM
Fig. 20 Ignition Switch Mounting
1 ± MOUNTING SCREW
2 ± IGNITION SWITCH
19 - 36 STEERINGPL
REMOVAL AND INSTALLATION (Continued)

bolt nut to a torque of 28 N´m (250 in. lbs.). Install
the pinch bolt retainer pin.
(11) Install the upper and lower steering column
shrouds onto the steering column (Fig. 9). Snap the
two shrouds together and then install and tighten
the two screws securing the shrouds to the column.
(12) Install the steering column cover that mounts
below the steering column on the instrument panel
by first aligning the retainer clips and snapping the
cover into place. Install the two screws along the bot-
tom of the steering column cover.
(13) Align the clips along the outer edge of the
instrument cluster bezel with the mounting holes in
the instrument panel and install the bezel.
(14) Align the clips on the bottom of the instru-
ment panel top cover with the mounting holes in the
instrument panel and install the top cover by push-
ing it down into place.
(15) Install the screw securing the left end of the
top cover to the instrument panel.
CAUTION: If there is any question as to whether
the clockspring is in the centered position, the
clock spring needs to be recentered before install-
ing the steering wheel. If the clockspring is not cen-
tered, it may be overextended, causing the
clockspring to become inoperative.
(16) Center the clockspring using the following
procedure:
²Using your fingers, rotate the clockspring rotor
in the CLOCKWISE DIRECTION to the end of the
travel. Do not apply excessive torque.
²From the end of travel, rotate the rotor two full
turns and an additional half turn in the counter-
clockwise direction. (The wires should end up at the
bottom of the clockspring).
CAUTION: Do not install the steering wheel onto
the shaft of the steering column by driving it onto
the shaft.
(17) Feed the clockspring wiring leads through the
hole in the steering wheel (Fig. 6). Align the steering
wheel's wide mounting spline with the steering col-
umn shaft missing spline area and push the wheel
onto the shaft. Make sure the clockspring squares up
with the back of the wheel and does not bind.
(18) Install the steering wheel retaining nut and
tighten it until the steering wheel is fully installed
on shaft. Tighten the steering wheel retaining nut to
a torque of 61 N´m (45 ft. lbs.).
(19) Connect the clockspring electrical leads to the
speed control switches and reinstall the switches on
the steering wheel (Fig. 6).
(20) Install the airbag electrical lead from the
clockspring into the connector on the back of the air-bag module (Fig. 6). Be sure electrical connector from
clockspring is securely latched into airbag module
connector.
(21) Connect the horn switch electrical lead to the
connector on the back of the airbag module (Fig. 6).
CAUTION: The fasteners originally used for the air-
bag components are specifically designed for the
airbag system. They must never be replaced with
any substitutes. Anytime a new fastener is needed,
replace it with only the correct fastener listed in the
parts book.
(22) Install the airbag module into the center of
the steering wheel. Align the airbag module mount-
ing holes with the bolt holes in steering wheel (Fig.
6). Install only the two original or identical replace-
ment airbag module mounting screws. Tighten the
two air bag module attaching bolts to a torque of 10
N´m (90 in. lbs.).
(23) Install the airbag mounting screw trim caps
on the steering wheel rear cover (Fig. 7). One belongs
on each side of the steering wheel.
NOTE: When reconnecting the battery on a vehicle
that has had the airbag module removed, the fol-
lowing procedure should be used.
(24) Reconnect the ground cable to the negative
post of the battery in the following manor:
²Connect a scan tool (DRBIIIt) to the data link
diagnostic connector located below the steering col-
umn.
²Turn the ignition key to the ON position. Exit
the vehicle with the scan tool leaving the scan tool
harness plugged in.
²Ensuring that there are no occupants in the
vehicle, connect the ground (-) cable to the negative
post of the battery.
²Using the scan tool, read and record any fault
codes. Refer to the DRIVER AND PASSENGER AIR-
BAG SYSTEM diagnostic manual if any faults are
found.
²Erase any stored faults if there are no active
fault codes. If a problem exists, the fault code will
not erase.
²Reach around the back of the steering wheel (in
front of the instrument cluster) and turn the ignition
key to OFF, then back ON while observing the
instrument cluster airbag lamp. It should go on for
six to eight seconds, then go out. This will indicate
that the airbag system is functioning normally. If air-
bag warning lamp fails to light, blinks on and off, or
goes on and stays on, there is an airbag system mal-
function. Refer to the BODY DIAGNOSTIC PROCE-
DURES manual to diagnose the system malfunction.
PLSTEERING 19 - 37
REMOVAL AND INSTALLATION (Continued)