Chrysler neon 1997 Service Manual page 314

PL
VEHICLE SPEED CONTROL SYSTEM
GENERAL INFORMATION
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . 1
DESCRIPTION AND OPERATION
POWERTRAIN CONTROL MODULE . . . . . . . . . . 3
SERVO CABLE . . . . . . . . . . . . . . . . . . . . . . . . . 3
SPEED CONTROL SERVO
SPEED CONTROL SWITCHES
STOP LAMP SWITCH
VACUUM RESERVOIR . . . . . . . . . . . . . . . . . . . . 3
VEHICLE SPEED SENSOR . . . . . . . . . . . . . . . . 3
DIAGNOSIS AND TESTING
CHECKING FOR DIAGNOSTIC CODES . . . . . . . 3
ELECTRICAL TESTS AT POWERTRAIN
CONTROL MODULE . . . . . . . . . . . . . . . . . . . . 8
OVERSHOOT/UNDERSHOOT ON SPEED
CONTROL SET . . . . . . . . . . . . . . . . . . . . . . . . 7
GENERAL INFORMATION
INTRODUCTION
The speed control system is electronically con-
trolled and vacuum operated. The electronic control
is integrated into the powertrain control module
which is located in the engine compartment. The con-
trols are located on the steering wheel and consist of
five switches. The ON and OFF buttons are located
on the left side of the airbag module. The RESUME/
ACCEL, SET/COAST and CANCEL buttons are
located on the right side of the airbag module (Fig.
1). For identification and location of the major com-
ponents (Fig. 2) and (Fig. 3).
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.
CONTENTS
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. . . . . . . . . . . . . 2
. . . . . . . . . . . . . . . . . . . . 3
ACCEL
CANCEL
VEHICLE SPEED CONTROL SYSTEM
page
ROAD TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SERVO VACUUM TEST . . . . . . . . . . . . . . . . . . . 7
SPEED CONTROL ELECTRICAL TEST
SPEED CONTROL SWITCH TEST . . . . . . . . . . . 7
STOP LAMP SWITCH TEST . . . . . . . . . . . . . . . . 8
VACUUM SUPPLY TEST
VEHICLE SPEED SENSOR . . . . . . . . . . . . . . . . 9
REMOVAL AND INSTALLATION
POWERTRAIN CONTROL MODULE . . . . . . . . . 11
SPEED CONTROL SERVO CABLE . . . . . . . . . . 10
SPEED CONTROL SERVO
SPEED CONTROL SWITCH . . . . . . . . . . . . . . . 10
STOP LAMP SWITCH . . . . . . . . . . . . . . . . . . . . 10
VACUUM RESERVOIR . . . . . . . . . . . . . . . . . . . 11
VEHICLE SPEED SENSOR
Fig. 1 Speed Control Switch
RES SPEED SWITCHES CONTROL OFF
. . . . . . . . . . . . . . . . . . 9
. . . . . . . . . . . . . . . . 9
. . . . . . . . . . . . . . . 11
COAST SET
ON
8H - 1
page
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