VEHICLE SPEED CONTROL SYSTEM
TABLE OF CONTENTS
page page
DESCRIPTION AND OPERATION
SPEED CONTROL SYSTEM .................1
SPEED CONTROL SERVO-PCM OUTPUT.......2
SPEED CONTROL SWITCHES ...............2
INTERACTIVE SPEED CONTROL .............2
BRAKE LAMP SWITCH.....................3
SERVO CABLE ...........................4
POWERTRAIN CONTROL MODULE ...........4
VACUUM RESERVOIR .....................4
VEHICLE SPEED AND DISTANCE.............4
ROAD TEST .............................4
CHECKING FOR DIAGNOSTIC CODES .........5
REMOVAL AND INSTALLATION
SERVO .................................5
SPEED CONTROL SWITCH..................5
SPEED CONTROL SERVO CABLE—2.7L .......5
SPEED CONTROL SERVO CABLE—3.2/3.5L ....6
VACUUM RESERVOIR .....................6
SPECIFICATIONS
TORQUE ................................7
DESCRIPTION AND OPERATION
SPEED CONTROL SYSTEM
DESCRIPTION
The speed control system is electronically con-
trolled and vacuum operated. The electronic control
is integrated into the powertrain control module,
located on the driver’s side under the speed control
servo. The controls are located on the steering wheel.
The ON, OFF, and SET buttons are located on the
left side of the airbag module. The RESUME,
ACCEL, CANCEL and COAST buttons are located on
the right side of the airbag module (Fig. 1).
The system is designed to operate at speeds above
30 mph (48 km/h).
WARNING: THE USE OF SPEED CONTROL IS
NOT RECOMMENDED WHEN DRIVING CONDITIONS
DO NOT PERMIT MAINTAINING A CONSTANT
SPEED, SUCH AS IN HEAVY TRAFFIC OR ON
ROADS THAT ARE WINDING, ICY, SNOW COVERED,
OR SLIPPERY.
OPERATION
When speed control is activated by depressing the
ON switch, the PCM allows a set speed to be stored
in RAM for speed control. To store a set speed,
depress the SET switch while the vehicle is moving
at a speed between 30 and 85 mph. In order for the
speed control to engage, the brakes cannot be
applied, nor can the gear selector be indicating the
transmission is in Park or Neutral.
The speed control can be disengaged manually by:
• Stepping on the brake pedal
• Depressing the OFF switch
• Depressing the CANCEL switch.
• Depressing the clutch pedal
NOTE: Turning the system off by depressing the
OFF switch or turning off the ignition switch will
erase the set speed stored in the PCM.
For added safety, the speed control system is pro-
grammed to disengage for any of the following condi-
tions:
• An indication of Park or Neutral
• A rapid increase rpm (indicates that the clutch
has been disengaged)
Fig. 1 Speed Control Switches
LH VEHICLE SPEED CONTROL SYSTEM 8H - 1
To Next Page
Loading...
