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34-4
CRUISE CONTROL
The cruise control system uses mechanical, electrical,
and vacuum operated devices to maintain vehicle
speed at a setting selected by the driver.
System Description
The cruise control unit receives command signals from
the cruise control switch. It receives information about
operating conditions from the brake switch, the speed-
ometer, the clutch switch (manual transmission), and
the automatic transmission mode switch and power-
train control module (PCM)(automatic transmission).
The cruise control unit sends operational signals to the
devices that regulate the throttle position. The throttle
position maintains the selected vehicle speed. The con-
trol unit compares the actual speed of the vehicle to the
selected speed. The control unit then uses the result of
that comparison to open or close the throttle.
The brake switch releases the system’s control of the
throttle at the instant the driver depresses the brake
pedal. The switch sends a signal to the cruise control
unit when the brake pedal is depressed; the cruise con-
trol unit responds by allowing the throttle to close. The
clutch switch or the automatic transmission mode
switch sends a disengage signal input to the cruise con-
trol unit that also allows the throttle to close.
System Operation
The cruise control system will set and automatically
maintain any speed above 25 mph (40 km/h). To set,
press the cruise control main switch so that the
“CRUISE MAIN” indicator is on. After reaching the de-
sired speed, press the set switch. The cruise control
unit will receive a set signal input and will activate the
cruise control actuator.
Pushing the cruise control main switch cancels the
cruise control system. This removes power to the cruise
control unit and erases the set speed from memory. The
cruise control system also disengages when cruising
speed is lower than the preset speed by 12 mph (19 km/
h) or more. If the system is disengaged temporarily by
the brake switch, clutch switch, or the automatic trans-
mission mode switch and vehicle speed is still above 25
mph (40 km/h), turn and release the resume/accel
switch. With the resume/accel switch turned and re-
leased, the set memory is retained, the vehicle auto-
matically returns to the previous set speed.
For gradual acceleration without depressing the accel-
erator pedal, turn the resume/accel switch and hold it
there until the desired speed is reached. This will send
an acceleration signal input to the cruise control unit.
When the switch is released, the system will be
reprogrammed for the new speed. Quickly turning and
releasing the resume/accel switch allows you to tap up
the preset cruising speed. Each turn increases the pre-
set speed by 1 mph (1.6 km/h). The preset speed can
be increased by up to 10 mph (16 km/h) in this manner.
To slow the vehicle down, depress and hold the set/
coast switch. This will send a deceleration signal input
to the cruise control unit, causing the vehicle to coast
until the desired speed is reached. When the desired
speed is reached, release the set/coast switch. This will
reprogram the system for the new speed. Quickly de-
pressing and releasing the set/coast switch allows you
to tap down the preset cruising speed. Each depress
decreases the preset speed by 1 mph (1.6 km/h). The
preset speed can be decreased to a minimum of 25
mph (40 km/h) in this manner.
Circuit Operation
TORQUE ON DEMAND (T.O.D.) SYSTEM
4H/L Transfer Switch Assembly
Brake Switch
Clutch Solenoid (Transfer)
Dash Fuse Box
Data Link Connector (DLC) C-63
Front Speed Sensor (Transfer)
Fuse/Relay Box
Noise Suppression Filter #1
Rear Speed Sensor (Transfer)
T.O.D. Control Unit
Throttle Position (TP) Sensor
Component Index
37
TORQUE ON DEMAND (T.O.D.) SYSTEM
HOT IN ON OR START
CB-16
ELEC.
IG.15A
DASH
FUSE
BOX
CB-4
METER
15A
CB-13
STOPLIGHT
15A
T.O.D.
CONTROL
UNIT
RR
1
2
3
AUT
O
CHECK
VIO/WHT
BLU/WHT
HOT IN ON OR START
HOT AT ALL TIMES
METER
ASSEMBLY
4
7
2
10
9
8
5
B-7
B-7
H-19
YEL/RED
BLU/YEL
PNK/WHT
ORN/WHT
RED/BLU
18
16
13
14
15
17
See Dash
Fuse Box,
page 11-5.
1
C-44
BLU/WHT
YEL
C-43
2
1
Ignition
29
27
26
25
28
30
7
Brake switch
input
15
24
18
23
Clutch solenoid
control
4
Speed sensors input/output
Indicator control
GRN
C-44
H-17
1
7
GRN
CLUTCH
SOLENOID
(TRANSFER)
FRONT
SPEED
SENSOR
(TRANSFER)
1
GRN
GRN
LT GRN
2
GRN/WHT
C-43
2
12
GRN/WHT
4
6
GRN/WHT
LT BLU
H-16
GRN/RED
C-44
12
10
GRN/RED
7
10
GRN/RED
GRY/RED
REAR
SPEED
SENSOR
(TRANSFER)
9
GRY/RED
GRN/RED
5
BLK/
LT GRN
C-43
11
9
GRN/YEL
1
GRN
8
LT BLU
C-44
4
GRN/YEL
GRN/YEL
GRN/YEL
H-17
3
H-16
10
M-27
YEL
5
H-27
Ground
Ground
Ref
Ref
(+)
Signal
21
20
22
1
12
2
LT BLU
LT BLU
GRN/RED
H-18
1
See Dash
Fuse Box,
page 11-3.
LT GRN
YEL
YEL/RED
BLU/YEL
PNK/WHT
ORN/WHT
RED/BLU
BLU/WHT
VIO/WHT
(+)
Signal
GRN/WHT
GRN
BRAKE SWITCH
Closed with
brake pedal
depressed.
C-37A
4
1
C-37A
Brake Lights,
Automatic
Transmission
Controls
1
C-37
Brake
Lights
NOISE
SUPPRESSION
FILTER #1
GRN
Brake
Lights
NOISE
SUPPRESSION
FILTER #1
RED
RED
4
C-37
RED
RED
GRN
GRN
Shift
Interlock
System
3
H-18
GRN
GRN
GRN
Circuit Schematic
37-1
TORQUE ON DEMAND (T.O.D.) SYSTEM
See Ground
Distribution,
page 14-4.
RED
BLK
YEL
6
Lights
ON
input
C-44
3
11
PNK
HOT AT ALL TIMES
See Power
Distribution,
page 10-1
FUSE/
RELAY
BOX
Ground
19
M-27
3
BLK/BLU
H-27
2
BLK/BLU
H-16
7
BLK/BLU
BLK/BLU
H-5
14
BLK/BLU
BLK/BLU
See Ground
Distribution,
page 14-5.
BLK/BLU
E-30
6
LT GRN/RED
1
Lighting
Switch
Details
C-44
12
Power
ground
20
13
BLK
8
BLK
7
BLK
BLK
P-15
3
4H
switch
input
8
2
GRY/RED
3
GRY/RED
4
GRY/RED
C-43
4
4L
switch
input
9
H-16
15
GRY/BLU
H-27
6
GRY/BLU
M-27
12
GRY/BLU
4H/L
TRANSFER
SWITCH
ASSEMBLY
C-44
6
BLK/
BLU
C-43
Anti-lock Brake
System (ABS)
Lighting
Switch
Details
3
1
E-5
2
9
TP sensor
input
21
BLU
H-4
5
BLU
GRN
RED
BLU
ORN/BLK
BLU
Engine Controls
THROTTLE
POSITION
(TP) SENSOR
7
ORN/BLK
10
ORN/BLK
Anti-lock Brake
System (ABS)
8
8
WHT
C-63
16
DLC
input/output
5
C-63
4
DATA LINK
CONNECTOR (DLC)
22
13
BLK
C-43
See Ground
Distribution,
page 14-2.
1
2
3
BLK/BLU
4H
4L
11
“ABS
active”
input
3
4WD
engaged
output
BLK
BLK
GRN/YEL
C-31
E-28
BLK/PNK
BLK/RED
GRN/RED
GRN/YEL
Ground
14
GRN/RED
GRN/
RED
EB-2
HORN
10A
Circuit Schematic
T.O.D. CONTROL UNIT
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