Jeep XJ. Manual — part 113
VEHICLE SPEED CONTROL SYSTEM
TABLE OF CONTENTS
page
DESCRIPTION AND OPERATION
DIESEL ENGINE SPEED CONTROL SYSTEM . . . . 1
DESCRIPTION AND OPERATION
DIESEL ENGINE SPEED CONTROL SYSTEM
Unique features for the 2.5L diesel engine will be
covered in this section.
• Models 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.
• The range of the speed control system operation
is restricted to speeds between 56 km/h (35 MPH) to
145 km/h (90 MPH).
• Inputs to the MSA that allow speed control oper-
ation are from the vehicle speed sensor and the
Speed Control Switch.
• Two 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:
• Within the two switch modules, five momen-
tary contact switches, supporting seven different
speed control functions are used. The outputs from
these switches are filtered into one input. The MSA
determines which output has been applied through
resistive multiplexing. The input circuit voltage is
measured by the MSA to determine which switch
function has been selected.
• 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 run-
ning.
• 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 procedures. The
individual switches cannot be repaired. If one indi-
vidual switch fails, the switch module must be
replaced.
XJ
VEHICLE SPEED CONTROL SYSTEM
8H - 1
2000 JEEP CHEROKEE
2000 JEEP CHEROKEE
TURN SIGNAL AND HAZARD WARNING SYSTEMS
TABLE OF CONTENTS
page
page
DESCRIPTION AND OPERATION
TURN SIGNAL SYSTEM . . . . . . . . . . . . . . . . . . . . 1
HAZARD WARNING SYSTEM . . . . . . . . . . . . . . . . 1
TURN SIGNAL SWITCH AND HAZARD
WARNING SWITCH . . . . . . . . . . . . . . . . . . . . . . 2
DIAGNOSIS AND TESTING
TURN SIGNAL AND HAZARD WARNING
SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
WARNING SWITCH . . . . . . . . . . . . . . . . . . . . . . 5
REMOVAL AND INSTALLATION
COMBINATION FLASHER . . . . . . . . . . . . . . . . . . . 5
TURN SIGNAL SWITCH AND HAZARD
WARNING SWITCH . . . . . . . . . . . . . . . . . . . . . . 6
DESCRIPTION AND OPERATION
TURN SIGNAL SYSTEM
DESCRIPTION
A turn signal system is standard factory-installed
safety equipment on this model. The turn signal sys-
tem uses ignition switched battery current, and will
operate only when the ignition switch is in the On or
Accessory positions. The turn signal system includes
the following components:
• Combination flasher
• Front side marker lamps
• Turn signal cancelling cam
• Turn signal indicator lamps
• Turn signal lamps
• Turn signal switch.
Refer to Lamp in the proper section of Group 8L -
Lamps for more information on the exterior turn sig-
nal lamps. Refer to Instrument Cluster in the
proper section of Group 8E - Instrument Panel Sys-
tems for more information on the turn signal indica-
tor lamps. Following are general descriptions of the
major components in the turn signal system. For
complete circuit diagrams, refer to Turn Signals in
the Contents of Group 8W - Wiring Diagrams.
OPERATION
With the ignition switch in the On or Accessory
position, and the turn signal (multi-function) switch
control stalk moved up (right turn) or down (left
turn), the turn signal system is activated. When the
turn signal system is activated, the circuitry of the
turn signal switch and the combination flasher will
cause the selected (right or left) turn signal indicator
lamp, front park/turn signal lamp, front side marker
lamp and rear tail/stop/turn signal lamp to flash on
and off. If the exterior lamps are turned off, the front
park/turn signal lamp and the front side marker
lamp will flash in unison. If the exterior lamps are
turned on, the front park/turn signal lamp and the
front side marker lamp will flash alternately.
See the owner’s manual in the vehicle glove box for
more information on the features, use and operation
of the turn signal system.
HAZARD WARNING SYSTEM
DESCRIPTION
A hazard warning system is standard factory-in-
stalled safety equipment on this model. Unlike the
turn signal system, the hazard warning system uses
a non-switched source of battery current so that the
system will operate regardless of the ignition switch
position. The hazard warning system includes the fol-
lowing components:
• Combination flasher
• Front side marker lamps
• Hazard warning switch
• Turn signal indicator lamps
• Turn signal lamps.
Refer to Lamp in the proper section of Group 8L -
Lamps for more information on the exterior turn sig-
nal lamps. Refer to Instrument Cluster in the
proper section of Group 8E - Instrument Panel Sys-
tems for more information on the turn signal indica-
tor lamps. Following are general descriptions of the
major components in the hazard warning system. For
complete circuit diagrams, refer to Turn Signals in
the Contents of Group 8W - Wiring Diagrams.
XJ
TURN SIGNAL AND HAZARD WARNING SYSTEMS
8J - 1
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