VEHICLE SPEED CONTROL SYSTEM
CONTENTS
page
GENERAL INFORMATION
INTRODUCTION........................ 1
GENERAL INFORMATION
INTRODUCTION
This group covers both Left-Hand Drive (LHD) and
Right-Hand Drive (RHD) versions of this model.
Whenever feasible, the RHD versions of affected
vehicle components have been constructed as mirror-
image of the LHD versions. While most of the illus-
trations used in this group represent only the LHD
version, the diagnostic and service procedures out-
lined can generally be applied to either version.
Exceptions to this rule have been clearly identified as
LHD or RHD, if a special illustration or procedure
was/is required.
The speed control system used with the 2.5L diesel
engine is basically identical to the system used with
gasoline powered engines. Features unique to the
diesel engine will be covered in this section.
²Models equipped with the 2.5L diesel engine do
not use a vacuum reservoir to retain engine vacuum
for speed control operation. There are no vaccum-op-
erated speed control servos used in vehicles with the
2.5L diesel engine.
²The range of the speed control system operation
is restricted to speeds between 56 km/h (35 MPH) to
145 km/h (90 MPH).
²Inputs to the MSA that allow speed control oper-
ation are from the vehicle speed sensor and the
Speed Control Switch.²Two separate speed control switch modules are
mounted on the steering wheel to the left and right
side of the driver's airbag module. Switch features
are:
a. Within the two switch modules, fivemomen-
tarycontact switches, supporting seven different
speed control functions are used.
b. The outputs from these switches are filtered
into one input. The MSA determines which output
has been applied throughresistive multiplexing.
The input circuit voltage is measured by the MSA
to determine which switch function has been
selected.
c. A speed control indicator lamp, located on the
instrument panel cluster is energized by the MSA
via the CCD Bus. This occurs when speed control
system power has been turned ON, and the engine
is running.
d. The two switch modules are labeled: ON/OFF,
SET, RESUME/ACCEL, CANCEL and COAST.
Refer to the owner's manual for more information
on speed control switch functions and setting pro-
cedures. The individual switches cannot be
repaired. If one individual switch fails, the switch
module must be replaced.
NS/GSVEHICLE SPEED CONTROL SYSTEM 8H - 1
TURN SIGNAL AND FLASHERS
CONTENTS
page page
GENERAL INFORMATION
COMBINATION FLASHER.................. 1
INTRODUCTION......................... 1
DESCRIPTION AND OPERATION
COMBINATION FLASHER / DAYTIME
RUNNING LAMPS (DRL) MODULE......... 2
COMBINATION FLASHER FUNCTION......... 1DIAGNOSIS AND TESTING
COMBINATION FLASHER WITH / WITHOUT
DAYTIME RUNNING LAMPS MODULEÐ
CIRCUIT DIAGNOSTICS.................. 3
TURN SIGNAL MULTI-FUNCTION SWITCH.... 2
REMOVAL AND INSTALLATION
COMBINATION FLASHER WITH / WITHOUT
DRL MODULE........................ 11
MULTI-FUNCTION SWITCH............... 11
GENERAL INFORMATION
INTRODUCTION
The turn signals are actuated with a lever on the
left side of the steering column just ahead of the
steering wheel. The signals are automatically turned
off by a canceling cam (two lobes molded to the clock-
spring mechanism). The cam comes in contact with
the cancel actuator on the turn signal (multi-func-
tion) switch assembly. Either cam lobe, pushing on
the cancel actuator, returns the switch to the OFF
position.
Lane change signaling is actuated by applying par-
tial turn signal stalk movement toward the direction
desired until the indicator lamps flashes in the
instrument cluster. When the switch stalk is released
the stalk will spring back into the neutral position
turning OFF the turn signal.
With the ignition switch ON and the turn signal
switch stalk actuated left or right, current flows
through the:
²Combination flasher
²Multi-function switch
²Turn indicator lamp
²Front and rear turn signal bulbs.
A chime will sound after the vehicle has traveled a
distance of approximately 0.5 mile with the turn sig-
nal ON.
COMBINATION FLASHER
The Turn Signal/Hazard Warning Flasher is a
module providing the vehicle with turn signal and
hazard warning functions and has been designed
with internal relays to take advantage of low current
switching requirements in the vehicle. It is plugged
into the Junction Block at position 4 (Fig. 1), where
all wiring associated with its operation is terminated.The Junction Block is adjacent to and left of the
steering column of the vehicle.
To gain access to the flasher, remove the lower
steering column cover and knee blocker. Refer to
Group 8E, Instrument Panel and Systems for
removal procedures.
DESCRIPTION AND OPERATION
COMBINATION FLASHER FUNCTION
The Turn Signal/Hazard Warning Flasher is a
module providing turn signal, hazard warning func-
tions and has been designed with internal relays to
Fig. 1 Combination Flasher Location
NSTURN SIGNAL AND FLASHERS 8J - 1
take advantage of low current switching require-
ments in the vehicle. It is plugged into the Junction
Block at positions 4 (Fig. 1) where all wiring associ-
ated with its operation is terminated. The Junction
Block is adjacent to and left of the steering column of
the vehicle.
To gain access to the device, remove the lower
steering column cover and knee blocker, refer to
Group 8E, Instrument Panel and Systems.
The combination flasher may be operated in its
hazard warning mode either with or without the igni-
tion circuit being active. However, in order to operate
in the turn signal mode, the ignition circuit must be
completed to the module.
While the combination flasher is idle, there is no
current drawn through the module. The device does
not become active until a signal ground circuit is
supplied to either of the turn signal inputs or the
hazard warning input.
Typical flash rate for the flasher is 90 flashes per
minute.
When a lamp is burnt out for a given side of the
vehicle or a wire is open to a lamp, the flash rate will
increase to 180 flashes per minute when in the turn
signal mode. When in the hazard warning signal
mode the flash rate remains at 90 flashes per
minute.
Turn signal inputs that actuate the flasher are low
current grounds, each drawing a maximum of 300
mA., and are provided to the flasher through the
Junction Block from the multi-function switch that is
mounted to the steering column. The hazard warning
signal input is a low current ground drawing a max-
imum of 600 mA. through the multi-function switch.
COMBINATION FLASHER / DAYTIME RUNNING
LAMPS (DRL) MODULE
The Combination Flasher/DRL is a module provid-
ing turn signal, hazard warning, and daytime run-
ning light functions, and has been designed with
internal relays to take advantage of low current
switching requirements in the vehicle. It is plugged
into the junction block at positions 3 AND 4 (Fig. 2)
where all wiring associated with its operation is ter-
minated. The Junction Block is adjacent to and left of
the steering column of the vehicle.
To gain access to the device, remove the lower
steering column cover and knee blocker, refer to
Group 8E, Instrument Panel and Gauges.
The combination flasher/DRL may be operated in
its hazard warning mode either with or without the
ignition circuit being active. However, in order to
operate in the turn signal mode or the DRL mode,
the ignition circuit must be completed to the module.
While the combination flasher portion is idle, there
is no current drawn through the module. The devicedoes not become active in the turn signal or hazard
warning modes until a signal ground circuit is sup-
plied to either of the turn signal inputs or the hazard
warning input. With the ignition OFF, there is no
current drawn through the module.
While the ignition is ON, the front turn signal fil-
aments are illuminated steadily thus providing the
DRL function. The DRL function may be inhibited by
applying a signal ground input from either the park
brake circuit or the headlamp relay activation circuit.
Typical flash rate for the flasher is 90 flashes per
minute.
When a lamp is burnt out for a given side of the
vehicle or a wire is open to a lamp, the flash rate will
increase to 180 flashes per minute when in the turn
signal mode. When in the hazard warning signal
mode the flash rate remains at 90 flashes per
minute.
Turn signal inputs that actuate the flasher are low
current grounds, each could draw a maximum of 300
mA., and are provided to the flasher through the
Junction Block from the multi-function switch that is
mounted to the steering column. The hazard warning
signal input is a low current ground that could draw
a maximum of 600 mA. through the multi-function
switch.
DIAGNOSIS AND TESTING
TURN SIGNAL MULTI-FUNCTION SWITCH
To test turn signal, headlamp beam select and opti-
cal horn portion of the multi-function switch:
(1) Remove the multi-function switch, refer to
removal procedures.
(2) Using an ohmmeter check continuity reading
between multi-function switch pins. Refer to (Fig. 3)
for proper pin numbers and Turn Signal Multi-Func-
tion Switch Test chart.
Fig. 2 Junction Block Terminal Pins
8J - 2 TURN SIGNAL AND FLASHERSNS
DESCRIPTION AND OPERATION (Continued)
REAR WIPER AND WASHER
INDEX
page page
DESCRIPTION AND OPERATION
INTRODUCTION......................... 9
REAR WINDOW WIPER/WASHER SWITCHES . . . 9
DIAGNOSIS AND TESTING
DIAGNOSTIC PROCEDURES................ 9
REMOVAL AND INSTALLATION
REAR GLASS RUBBER GROMMET........... 9REAR WINDOW WIPER MOTOR............ 10
REAR WIPER ARM...................... 10
REAR WIPER BLADE ELEMENT............ 10
REAR WIPER BLADE..................... 10
DESCRIPTION AND OPERATION
INTRODUCTION
When continuous rear wiper operation is required,
the Body Control Module (BCM) will provide ignition
ON voltage to the rear wiper motor. When the wiper
switch is turned OFF, the BCM provides circuit
ground to operate the motor until the wipe cycle is
complete and the wiper arm returns to the base of
the rear window.
When intermittent rear wiper mode is selected, the
wiper motor will cycle every 7 seconds. The intermit-
tent delay time is also adjusted based upon vehicle
speed. With the vehicle traveling greater at 50 mph,
the cycle changes to every 5 seconds.
REAR WINDOW WIPER/WASHER SWITCHES
The rear window wiper/washer switches are incor-
porated into the HVAC switch panel. Refer to Group
8E, Instrument Panel for proper service procedures.
DIAGNOSIS AND TESTING
DIAGNOSTIC PROCEDURES
The rear window wiper system operates in several
modes:
²Continuous wipe
²Intermittent wipe
²Wash
²Wipe after wash
The windshield wiper circuits are continuously
monitored and controlled by the Body Control Mod-
ule (BCM). If a problem occurs in the electronic com-
ponents, wiring, switch (except integral motor park
switch) and wiper motor a Diagnostic Trouble Code
(DTC) will be stored in the BCM memory. The
DTC(s) can be retrieved using a scan tool (DRB).
Refer to proper Body Diagnostic Procedures manual
for DTC descriptions and retrieval information.
REMOVAL AND INSTALLATION
REAR GLASS RUBBER GROMMET
REMOVAL
(1) Remove rear window wiper motor.
(2) Peel wiper pivot seal grommet from rear glass.
(3) Remove grommets from vehicle (Fig. 1).
INSTALLATION
For installation, reverse the above procedure.
Fig. 1 Rear Glass Rubber Grommet
Fig. 2 Rear Glass Rubber Grommets
NSWINDSHIELD WIPERS AND WASHERS 8K - 9
ning light functions (for Canadian vehicles), and has
been designed with internal relays to take advantage
of low current switching requirements in the vehicle.
It is plugged into the junction block at positions
three and four (Fig. 1), where all wiring associated
with its operation is terminated. The junction block
is adjacent to and left of the steering column of the
vehicle. For diagnostic information refer to Group 8J,
Turn Signal and Flashers.
On vehicles built for use in the United States, only
position four is used. Vehicles built for use in Canada
utilize both positions three and four.
To gain access to the device, remove the lower
steering column cover and knee blocker. Refer to
Group 8E, Instrument Panel and Gauges.SYSTEM FUNCTION
The combination-flasher/DRL may be operated in
its hazard warning mode either with or without the
ignition circuit being active. However, in order to
operate in the turn signal mode or the DRL mode,
the ignition circuit must be completed to the module.
While the combination-flasher portion is idle, there
is no current drawn through the module. The device
does not become active in the turn signal or hazard
warning modes until a signal ground circuit is sup-
plied to either of the turn signal inputs or the hazard
warning input. With the ignition OFF, there is no
current drawn through the module.
While the ignition is ON, the front turn signal fil-
aments are illuminated steadily thus providing the
DRL function. The DRL function may be inhibited by
applying a signal ground input from either the park
brake circuit or the headlamp relay activation circuit.
DIAGNOSIS AND TESTING
DIAGNOSTIC PROCEDURES
When a vehicle experiences problems with the
headlamp system, verify the condition of the battery
connections, charging system, headlamp bulbs, wire
connectors, relay, high beam dimmer switch and
headlamp switch. Refer to Group 8W, Wiring Dia-
grams, for component locations and circuit informa-
tion.
Fig. 1 Junction Block Terminal PINS
8L - 2 LAMPSNS
GENERAL INFORMATION (Continued)
EXTERIOR LAMP SERVICE
INDEX
page page
GENERAL INFORMATION
HEADLAMP DIMMER SWITCH.............. 14
HEADLAMP MODULE.................... 14
HEADLAMP SWITCH..................... 14
REMOVAL AND INSTALLATION
CENTER HIGH MOUNTED STOP LAMP
(CHMSL)............................. 17
FOG LAMP ± TOWN and COUNTRY......... 15
FOG LAMP............................. 14FRONT PARKING AND TURN SIGNAL LAMP ±
TOWN and COUNTRY.................. 15
FRONT SIDE MARKER LAMP TOWN and
COUNTRY............................ 15
HEADLAMP MODULE.................... 14
LICENSE PLATE LAMP................... 16
TAIL, STOP, TURN SIGNAL AND BACK-UP
LAMP............................... 16
GENERAL INFORMATION
HEADLAMP MODULE
Minor amounts of fogging may occur around the
edges of the headlamp lens when exposed to humid
conditions. This is considered normal. The fogging
will dissipate with increased ambient temperature or
headlamp usage.
HEADLAMP SWITCH
Service procedures for the headlamp switch can be
found in Group 8E, Instrument Panel and Gauges.
More information can be found in Group 8W, Wiring
Diagrams.
HEADLAMP DIMMER SWITCH
The headlamp dimmer switch is incorporated into
the multi-function (turn signal) switch. Proper proce-
dures can be found in Group 8J, Turn Signal and
Flashers. More information can be found in Group
8W, Wiring Diagrams.
REMOVAL AND INSTALLATION
HEADLAMP MODULE
REMOVAL
(1) Release hood latch and open hood.
(2) From inside engine compartment, remove nuts
holding headlamp module to radiator closure panel.
(3) Remove screw holding top of module to closure
panel.
(4) Remove headlamp module from radiator clo-
sure panel (Fig. 1).
(5) Disconnect wire connectors from back of head-
lamp module.
(6) Separate headlamp module from vehicle.
INSTALLATION
(1) Place headlamp module in position on vehicle.
(2) Connect wire connectors into back of headlamp
module.
(3) Place headlamp module in position on radiator
closure panel.
(4) Install nuts to hold headlamp module to radia-
tor closure panel.
(5) Install screw to hold top of module to closure
panel.
(6) Verify headlamp operation and alignment.
FOG LAMP
REMOVAL
(1) Remove screws holding fog lamp to front
bumper fascia (Fig. 2).
(2) Remove fog lamp from fascia.
(3) Disconnect wire connector from body wire har-
ness.
(4) Remove fog lamp from vehicle.
Fig. 1 Headlamp Module ± Typical
8L - 14 LAMPSNS
INTERIOR LAMPS
INDEX
page page
REMOVAL AND INSTALLATION
CONVENIENCE BIN LAMP................. 20
DOME LAMP BULB...................... 21
DOME LAMP........................... 21
FRONT DOOR COURTESY LAMP BULB...... 22
FRONT DOOR COURTESY LAMP........... 21
GLOVE BOX LAMP AND SWITCH........... 19
GLOVE BOX LAMP BULB.................. 19
HEADER READING/COURTESY LAMP BULB . . . 19HEADER READING/COURTESY LAMP....... 18
IGNITION HALO LAMP BULB............... 19
INSTRUMENT PANEL LAMPS AND SWITCHES . 20
LIFTGATE COURTESY LAMP BULB.......... 24
LIFTGATE COURTESY LAMP............... 23
OVERHEAD CONSOLE READING/COURTESY
LAMP BULB.......................... 18
RAIL LAMP MODULE BULB................ 23
REMOVAL AND INSTALLATION
OVERHEAD CONSOLE READING/COURTESY LAMP
BULB
REMOVAL
(1) Using a trim stick, lightly pry outward the for-
ward end of reading lamp lens.
(2) Rotate reading lamp bulb socket one quarter
turn counterclockwise.
(3) Pull socket out of lamp (Fig. 1).
(4) Pull bulb from socket.
INSTALLATION
(1) Push bulb into socket.
(2) Push socket into lamp.
(3) Rotate reading lamp bulb socket one quarter
turn clockwise.
(4) Insert tab on lamp lens between lamp switch
and overhead console.(5) Snap lens onto lamp lens pivots.
HEADER READING/COURTESY LAMP
REMOVAL
(1) Grasp outer edges of header reading/courtesy
lamp at headlining.
(2) Pull downward to disengage clips on reading/
courtesy lamp from roof header panel (Fig. 2).
(3) Disconnect wire connector from reading/cour-
tesy lamp.
(4) Remove lamp from vehicle.
INSTALLATION
(1) Position lamp on vehicle.
(2) Connect wire connector to reading/courtesy
lamp.
(3) Align clips on reading/courtesy lamp to mating
holes in roof header panel.
(4) Push upward to engage clips on reading/cour-
tesy lamp to roof header panel.
Fig. 1 Reading/Courtesy LampFig. 2 Header Reading/Courtesy Lamp
8L - 18 LAMPSNS
HEADER READING/COURTESY LAMP BULB
REMOVAL
(1) Insert a small, flat bladed pry tool at forward
position between reading/courtesy lamp lens and
lamp housing.
(2) Pry lamp lens from lamp housing (Fig. 3).
(3) Insert a small, flat bladed pry tool between
lamp light shield and lamp housing at inboard rear
corner of light shield.
(4) Pry light shield from housing (Fig. 4).
(5) Carefully press forward lamp bulb contact
toward opposite contact and rotate.
(6) Remove bulb from lamp bulb contacts.
INSTALLATION
(1) Carefully press forward lamp bulb contact
toward opposite contact and rotate bulb into position.
(2) Position bulb to lamp bulb contacts.
(3) Release lamp bulb contacts.
(4) Insert outer edge of light shield into lamp
housing (Fig. 4).(5) Rotate light shield upward and snap inboard
edge into lamp housing.
(6) Position lens switch tab to lamp switch.
(7) Press lens pivots to tabs on lamp housing until
both pivots are seated.
GLOVE BOX LAMP AND SWITCH
REMOVAL
(1) Open glove box door.
(2) Using a trim stick, lightly pry glove box lamp/
switch from instrument panel.
(3) Disconnect wire connector from glove box lamp
(Fig. 5).
(4) Remove glove box lamp from vehicle.
INSTALLATION
(1) Position glove box lamp in vehicle.
(2) Connect wire connector from glove box lamp.
(3) Position glove box lamp in instrument panel.
(4) Press lamp into instrument panel until fully
seated.
GLOVE BOX LAMP BULB
REMOVAL
(1) Remove glove box lamp/switch from instrument
panel.
(2) Pull bulb from glove box lamp (Fig. 6).
INSTALLATION
(1) Push bulb into glove box lamp.
(2) Install glove box lamp/switch in instrument
panel.
IGNITION HALO LAMP BULB
REMOVAL
(1) Remove steering column trim covers. Refer to
Group 19, Steering, for proper procedures.
Fig. 3 Reading/Courtesy Lamp Lens
Fig. 4 Reading/Courtesy Lamp Light Shield
Fig. 5 Glove Box Lamp and Switch
NSLAMPS 8L - 19
REMOVAL AND INSTALLATION (Continued)