Vehicle Speed Control System - Chrysler Stratus RHD 1999 Electronic Service Manual

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VEHICLE SPEED CONTROL SYSTEM

DESCRIPTION AND OPERATION
AUTOMATIC SPEED CONTROL OVERSPEED
REDUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
POWERTRAIN CONTROL MODULE . . . . . . . . . . 3
SERVO CABLE . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SPEED CONTROL SERVO . . . . . . . . . . . . . . . . . . 2
SPEED CONTROL SWITCHES . . . . . . . . . . . . . . 3
SPEED CONTROL SYSTEM . . . . . . . . . . . . . . . . 1
STOP LAMP SWITCH . . . . . . . . . . . . . . . . . . . . . 3
VACUUM RESERVOIR . . . . . . . . . . . . . . . . . . . . 3
VEHICLE SPEED AND DISTANCE . . . . . . . . . . . . 3
DIAGNOSIS AND TESTING
CHECKING FOR DIAGNOSTIC CODES . . . . . . . . 4
ELECTRICAL TESTS AT POWERTRAIN
CONTROL MODULE . . . . . . . . . . . . . . . . . . . . . 6
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 left side of the engine compartment
next to the air cleaner. The controls are located on
the steering wheel and consist of two switches. The
ON, OFF, RESUME, ACCEL, SET, COAST, and
CANCEL, buttons are located on a spoke of the steer-
ing wheel (Fig. 1). For identification and location of
the major components (Fig. 2).
The system is designed to operate at speeds above
30 mph (50 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 SLIP-
PERY.
OPERATION
When speed control is selected by depressing the
ON switch, the PCM allows a set speed to be stored
in RAM for speed control. To store a set speed,
VEHICLE SPEED CONTROL SYSTEM
CONTENTS
page
OVERSHOOT/UNDERSHOOT FOLLOWING
SPEED CONTROL SET . . . . . . . . . . . . . . . . . . . 5
ROAD TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SERVO VACUUM TEST . . . . . . . . . . . . . . . . . . . . 5
SPEED CONTROL ELECTRICAL TEST . . . . . . . . 4
SPEED CONTROL SWITCH TEST . . . . . . . . . . . . 5
STOP LAMP SWITCH TEST . . . . . . . . . . . . . . . . 5
VACUUM SUPPLY TEST . . . . . . . . . . . . . . . . . . . 7
VEHICLE SPEED SIGNAL . . . . . . . . . . . . . . . . . . 7
REMOVAL AND INSTALLATION
SERVO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
SPEED CONTROL SERVO CABLE . . . . . . . . . . . . 8
SPEED CONTROL SWITCH . . . . . . . . . . . . . . . . . 8
STOP LAMP SWITCH . . . . . . . . . . . . . . . . . . . . 8
VACUUM RESERVOIR . . . . . . . . . . . . . . . . . . . . 9
Fig. 1 Speed Control Switch
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
8H - 1
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