tires CHEVROLET DYNASTY 1993 Service Manual
Page 18 of 2438
GROUP TAB LOCATOR
Introduction
0Lubrication and Maintenance
2Suspension/Driveshafts
5Brakes
6Manual Transaxle Clutch
7Cooling System
9Engine
11Exhaust System and Intake Manifold
13Frame and Bumpers
19Steering
21Transaxle
22Wheels/Tires
23Body
24Heating/Air Conditioning
Component and System Index
Service Manual Comment Forms (Rear of Manual)
Page 31 of 2438
COMPONENT AND SYSTEM INDEX
Name Group-page Name Group-page
BODY ................................... 23-1
AA-VEHICLE BODY COMPONENT SERVICE .......23-11
AC-VEHICLE BODY COMPONENT SERVICE .......23-37
AG-VEHICLE BODY COMPONENT SERVICE .......23-52
AJ/27-VEHICLE CONVERTIBLE BODY COMPONENT SERVICE ............................ 23-86
AJ-VEHICLE BODY COMPONENT SERVICE .......23-71
AP-VEHICLE BODY COMPONENT SERVICE .......23-97
AY-VEHICLE BODY COMPONENT SERVICE .......23-133
BODY DIAGNOSTIC PROCEDURES .............23-2
GENERAL SERVICE INFORMATION .............23-1
PAINT ................................. 23-4
POWER SUNROOF ........................ 23-6
WINDSHIELD ............................ 23-9
BRAKES ..................................5-1
ANTI-LOCK BRAKE SYSTEMÐBENDIX ANTI-LOCK 10 AC/Y BODY ......................... 5-72
ANTI-LOCK BRAKE SYSTEMÐBENDIX ANTI-LOCK 6 AA,AG,AJ,AP BODY .................... 5-113
BRAKE DISC (ROTOR) ...................... 5-53
BRAKE SUPPORT ASSEMBLY .................5-25
FRONT DISC BRAKES ...................... 5-31
GENERAL INFORMATION .....................5-1
HYDRAULIC SYSTEM CONTROL VALVES .........5-26
KELSEY HAYES DOUBLE PIN FAMILY CALIPER .....5-35
KELSEY HAYES DOUBLE PIN NON-FAMILY CALIPER ............................. 5-38
MASTER CYLINDER ....................... 5-66
PARKING BRAKES ........................ 5-57
POWER BRAKES ......................... 5-68
REAR DISC BRAKES ....................... 5-45
REAR WHEEL DRUM BRAKES ................5-18
SERVICE ADJUSTMENTS .....................5-4
WHEEL BEARINGS ........................ 5-70
WHEEL CYLINDERS ....................... 5-23
COOLING SYSTEM ...........................7-1
ACCESSORY DRIVE BELTS ................... 7-24
ENGINE BLOCK HEATER .................... 7-28
GENERAL INFORMATION .....................7-1
SERVICE PROCEDURES ..................... 7-10
SPECIFICATIONS ......................... 7-29
ENGINE ..................................9-1
2.2/2.5L ENGINES .........................9-8
3.0L ENGINE ............................ 9-66
3.3/3.8L ENGINE ......................... 9-98
STANDARD SERVICE PROCEDURES .............9-1
EXHAUST SYSTEM AND INTAKE MANIFOLD .........11-1
GENERAL INFORMATION .................... 11-1
SERVICE PROCEDURES ..................... 11-4
TORQUE SPECIFICATION ................... 11-25
FRAME AND BUMPERS ....................... 13-1
BUMPER AND FASCIA ...................... 13-1
FRAME ................................ 13-9
HEATING AND AIR CONDITIONING ...............24-1
AUTOMATIC TEMPERATURE CONTROL (ATC) .....24-66 COMPONENT SERVICE PROCEDURES
..........24-47
FIXED DISPLACEMENT COMPRESSORÐMODEL 10PA17............................. 24-24
FIXED DISPLACEMENT COMPRESSORÐMODEL SD709P ............................. 24-38
FIXED DISPLACEMENT COMPRESSORÐMODEL TR105 .............................. 24-32
GENERAL INFORMATION .................... 24-1
HEATER AND A/C PERFORMANCE TESTS .........24-6
REFRIGERANT SERVICE PROCEDURES ..........24-8
VACUUM CONTROL SYSTEM DIAGNOSIS .........24-4
VARIABLE DISPLACEMENT COMPRESSORÐMODEL 6C17 ............................... 24-13
INTRODUCTION .......................... Intro.-1
LUBRICATION AND MAINTENANCE ................0-1
CHASSIS AND BODY ....................... 0-19
DRIVETRAIN ............................ 0-16
ENGINE ................................0-8
GENERAL INFORMATION .....................0-1
MANUAL TRANSAXLE CLUTCH ...................6-1
STEERING ................................ 19-1
ACUSTAR STANDARD AND TILT STEERING COLUMN ............................ 19-28
AUTOMATIC TRANSMISSION SHIFTER/IGNITION INTERLOCK .......................... 19-36
GENERAL INFORMATION .................... 19-1
POWER STEERING GEAR ................... 19-25
POWER STEERING PUMPS ..................19-1
SPECIFICATIONS AND TIGHTENING REFERENCE . . . 19-42
SUSPENSION AND DRIVESHAFTS .................2-1
AUTOMATIC AIR LOAD LEVELING SYSTEM ........2-59
AUTOMATIC AIR SUSPENSION ................2-73
DRIVESHAFTS ........................... 2-25
FRONT SUSPENSION .......................2-2
FRONT SUSPENSION SERVICE PROCEDURES .......2-5
GENERAL INFORMATION .....................2-1
REAR (STUB) AXLE ALIGNMENT ALL MODELS .....2-89
REAR SUSPENSION ....................... 2-50
SPECIFICATIONS ......................... 2-91
TRANSAXLE .............................. 21-85
41TE FOUR SPEED AUTOMATIC TRANSAXLE ......21-85
41TE FOUR SPEED TRANSAXLE HYDRAULIC SCHEMATICS ........................ 21-170
41TE ON-BOARD DIAGNOSTICS .............21-145
A-523, A-543, and A-568 MANUAL TRANSAXLE ....21-1
SPECIFICATIONS ........................ 21-183
THREE SPEED TORQUEFLITE AUTOMATIC TRANSAXLE .......................... 21-35
THREE SPEED TRANSAXLE HYDRAULIC SCHEMATICS ........................ 21-162
WHEELSÐTIRES ........................... 22-1
SPECIFICATIONS ......................... 22-8
TIRE SERVICE PROCEDURES .................22-1
WHEELS SERVICE PROCEDURES ..............22-6
Page 52 of 2438
DRIVETRAIN INDEX
page page
Automatic Transaxle ...................... 16
Automatic Transaxle Floor Shift .............. 16
Clutch and Gearshift Linkage ............... 16
Drive Shaft Cv and Tripod Joint Boots ........ 17 Front Wheel Bearings
..................... 17
Manual Transaxle ........................ 16
Tires .................................. 17
CLUTCH AND GEARSHIFT LINKAGE
If the clutch or gearshift begins to operate with dif-
ficulty, squeak or grunt, the cables and linkage
should be lubricated before service replacement is
performed. For proper lubrication and service proce-
dures refer to Group 6, Clutch, or Group 21, Manual
Transaxle.
MANUAL TRANSAXLE
The manual transaxle should be inspected for oil
leaks and proper oil level when other under vehicle
service is performed. To inspect the transaxle oil
level, position the vehicle on a level surface. Remove
fill plug (Fig. 1) from the transaxle side cover. The
oil level should not be below 4 mm (3/16 in) from the
bottom of the oil fill opening. The manual transaxle does not require periodic
maintenance. The oil should be changed only when
water contamination is suspected. If oil has a foamy
or milky appearance it probably is contaminated. A
circular magnet located behind the differential cover
collects metallic particles circulating in the oil. For
proper diagnostic and service procedures, refer to
Group 21, Manual Transaxle.
SELECTING MANUAL TRANSAXLE OIL
Chrysler Corporation recommends Mopar Engine
Oil, SG or SG/CD SAE 5W-30, or equivalent, be used
to fill a 5-speed transaxle.
AUTOMATIC TRANSAXLE FLOOR SHIFT
If the automatic transaxle floor shift mechanism
becomes difficult to operate or starts to make objec-
tionable noise, the mechanism should be lubricated
before service repair is performed. To lubricate the
shift mechanism, remove console as necessary. Refer
to Group 23, Body. Apply a film of Mopar Multipur-
pose Grease or equivalent, to slide surfaces and pawl
spring. For additional information, refer to Group 21,
Transaxle.
AUTOMATIC TRANSAXLE
The automatic transaxle should be inspected for
fluid leaks and proper fluid level when other under
hood service is performed.
CAUTION: To minimize fluid contamination, verify
that dipstick is seated in the fill hole or tube after
fluid level reading is taken.
TO INSPECT THE TRANSAXLE FLUID LEVEL: (1) Position the vehicle on a level surface.
(2) Start engine and allow to idle in PARK for at
least 60 seconds. The warmer the transaxle fluid, the
more accurate the reading. (3) While sitting in driver seat, apply brakes and
place gear selector in each position. Return gear se-
lector to park. (4) Raise hood and remove transaxle fluid level in-
dicator (dipstick) and wipe clean with a suitable
cloth. (5) Install dipstick and verify it is seated in fill
hole or tube (Fig. 2 or 3).
CAUTION: Do not overfill automatic transaxle, leak-
age or damage can result.
(6) Remove dipstick, with handle above tip, take
fluid level reading (Fig. 4). If the vehicle has been
driven for at least 15 minutes before inspecting fluid
level, transaxle can be considered hot and reading
should be above the WARM mark. If vehicle has run
for less than 15 minutes and more than 60 seconds
transaxle can be considered warm and reading
Fig. 1 Manual Transaxle Fill Plug
0 - 16 LUBRICATION AND MAINTENANCE Ä
Page 53 of 2438
should be above ADD mark. Add fluid only if level is
below ADD mark on dipstick when transaxle is
warm.The automatic transaxle does not require periodic
maintenance when used for general transportation. If
the vehicle is subjected to severe service conditions,
the automatic transaxle will require fluid/filter
change and band adjustments every 24 000 km
(15,000 miles). For additional information, refer to
Severe Service paragraph and Lubrication and Main-
tenance Schedules in General Information section of
this group. The fluid and filter should be changed
when water contamination is suspected. If fluid has
foamy or milky appearance, it is probably contami-
nated. If the fluid appears brown or dark and a foul
odor is apparent, the fluid is burned, transaxle re-
quires maintenance or service. A circular magnet lo-
cated in the transaxle pan, collects metallic particles
circulating in the oil. For proper diagnostic and ser-
vice procedures, refer to Group 21, Automatic Tran-
saxle.
SELECTING AUTOMATIC TRANSAXLE FLUID
Chrysler Corporation recommends Mopar ATF Plus
(automatic transmission fluid type 7176) be used to
add to or replace automatic transaxle fluid. If ATF
Plus is not available use Mopar Dexron II tAuto-
matic Transmission Fluid or equivalent.
DRIVE SHAFT CV AND TRIPOD JOINT BOOTS
The front drive shaft constant velocity and tripod
joint boots (Fig. 5) should be inspected when other
under vehicle service is performed. Inspect boots for
cracking, tears, leaks or other defects. If service re-
pair is required, refer to Group 2, Suspension.
FRONT WHEEL BEARINGS
The front wheel bearings are permanently sealed,
requiring no lubrication. For proper diagnostic and
service procedures refer to Group 2, Suspension.
TIRES
The tires should be inspected at every engine oil
change for proper inflation and condition. The tires
should be rotated at the distance intervals described
in the Lubrication and Maintenance Schedules of the
General Information section in this group. For tire
inflation specifications refer to the Owner's Manual.
A Tire Inflation sticker is located in the driver door
opening. For proper diagnostic procedures, see Group
22, Wheels and Tires.Fig. 2 3-speed Automatic Transaxle Fill hole
Fig. 3 4-speed Automatic Transaxle Fill tube
Fig. 4 Automatic Transaxle DipstickÐTypical
Fig. 5 Drive Shaft Boots
Ä LUBRICATION AND MAINTENANCE 0 - 17
Page 63 of 2438
FRONT SUSPENSION SERVICE PROCEDURES INDEX
page page
Ball Joints .............................. 13
Hub and Bearing Assembly ................. 20
Knuckle (Front Suspension) ................. 16
Lower Control Arm ....................... 10
Lower Control Arm Pivot Bushings ........... 11 Shock Absorbers (Strut Damper)
............. 10
Strut Damper Assembly ..................... 7
Suspension Coil Springs .................... 9
Sway Bar .............................. 14
Wheel Alignment .......................... 5
WHEEL ALIGNMENT
Front wheel alignment is the proper adjustment of
all interrelated front suspension angles. These angles
are what affects the running and steering of the
front wheels of the vehicle. The method of checking front alignment will vary
depending on the type of equipment being used. The
instructions furnished by the manufacturer of the
equipment should always be followed. With the ex-
ception that the alignment specifications recom-
mended by Chrysler Corporation be used. There are six basic factors which are the founda-
tion to front wheel alignment. These are height,
caster, camber, toe-in, steering axis inclination and
toe-out on turns. Of the six basic factors only camber
and toe in are mechanically adjustable (Fig. 1)
CAUTION: Do not attempt to modify any suspen-
sion or steering components by heating or bending
of the component.
Wheel alignment adjustments and checks should be
made in the following sequence. (1) Camber
(2) Toe
Camber is the number of degrees the top of the
wheel is tilted inward or outward from true vertical.
Inward tilt is negative camber. Outward tilt is posi-
tive camber. Excessive camber is a tire wear factor: negative
camber causes wear on the inside of the tire, while
positive camber causes wear to the outside. Toe
is measured in degrees or inches and is the
distance the front edges of the tires are closer (or far-
ther apart) than the rear edges. See Front Wheel
Drive Specifications for Toesettings.
PRE-ALIGNMENT
Before any attempt is made to change or correct
the wheel alignment factors. The following inspection
and necessary corrections must be made on those
parts which influence the steering of the vehicle. (1) Check and inflate tires to recommended pres-
sure. All tires should be the same size and in good
condition and have approximately the same wear.
Note type of tread wear which will aid in diagnosing,
see Wheels and Tires, Group 22. (2) Check front wheel and tire assembly for radial
runout. (3) Inspect lower ball joints and all steering link-
age for looseness. (4) Check for broken or sagged front and rear
springs. Front suspension must only be checked after the
vehicle has had the following checked or adjusted.
Tires set to recommended pressures, full tank of fuel,
no passenger or luggage compartment load and is on
a level floor or alignment rack. Just prior to each alignment reading. The vehicle
should be bounced (rear first, then front) by grasping
bumper at center and jouncing each end an equal
number of times. Always release bumpers at bottom
of down cycle.
Ä SUSPENSION AND DRIVESHAFTS 2 - 5
Page 107 of 2438
mount have been loosened for any reason, or if vehicle
has experienced front structural damage, driveshaft
lengths must be checked and corrected, if required. A
shorter than required driveshaft length can result in ob-
jectionable noise. A longer than required driveshaft
length may result in potential damage.
Use of the following procedure will ensure satisfac-
tory driveshaft engagement under all normal vehicle
operating conditions. (1) The vehicle must be completely assembled.
Front wheels must be properly aligned and in the
straight ahead position. The vehicle must be in a po-
sition so that the full weight of the body is distrib-
uted to all four tires. A platform hoist, or front end
alignment rack, is recommended.
(2) Using a tape measure or other suitable measuring
device. Measure the direct distance from the inner edge of the outboard boot to the inner edge of the inboard
boot on both driveshafts. This measurement must be
taken at the bottom (six o'clock position) of the drive-
shafts (Fig. 1).
Note that the required dimension varies with car-line,
engine, transaxle, and driveshaft manufacturer (Fig. 2).
(3) If the lengths of both shafts are within the
range specified, no further action is required. If either left or right driveshaft length is not
within the specified range. Refer to Group 09, Engine
Removal and Installation to properly position engine
according to specified driveshaft lengths.
(4) If proper driveshaft lengths cannot be achieved
within the travel limits available in the slotted engine
mounts. Check for any condition that could effect the
side to side position of the measurement locations (e.g.,
engine support brackets, siderail alignment, etc.).
(5) After ensuring proper driveshaft lengths the
transmission shift linkage must be adjusted to en-
sure proper operation. Refer to Transaxle, Group 21.
Fig. 2 Driveshaft Identification and Dimensions
Fig. 19 Left Driveshaft with Damper Weight
Fig. 1 Driveshaft Positioning
Ä SUSPENSION AND DRIVESHAFTS 2 - 49
Page 108 of 2438
REAR SUSPENSION INDEX
page page
Coil Springs and Jounce Bumper ............ 51
General Information ....................... 50
Pivot Bushing AC AG AJ AP Body ........... 55
Pivot Bushing AC and AY Body ............. 52 Rear Axle Assembly
...................... 57
Shock Absorbers ......................... 51
Track Bar-Brace-Bracket ................... 52
GENERAL INFORMATION
All front wheel drive passenger cars. Utilize a
Trailing Arm Twist Beam type rear axle in conjunc-
tion with coil (or air) springs (Fig. 1). The blade type
Trailing Arms, attached to body mounted pivots, pro- vide fore and aft location of the suspension while a
Track Bar provides lateral location. Located in line with the spindles. An open channel
section beam axle assures that the rear tires remain
parallel to each other, and essentially perpendicular
Fig. 1 Trailing Arm Rear Suspension
2 - 50 SUSPENSION AND DRIVESHAFTS Ä
Page 147 of 2438
REAR (STUB) AXLE ALIGNMENT ALL MODELS INDEX
page page
General Information ....................... 89 Rear Wheel Alignment..................... 89
GENERAL INFORMATION
Because front wheel drive vehicles are equipped with
rear suspension incorporating stub axles (or wheel
spindles). It is possible to align both the camber and toe
of the rear wheels.
REAR WHEEL ALIGNMENT
Alignment adjustment if required. Is made by adding
0.010 inch shims (from the service package kit) be-
tween the spindle mounting surface and axle mounting
plate. Each shim equals wheel change by .3É as shown
(for all car lines) in (Figs. 3 to 6). If rear wheel alignment is required, place vehicle on
alignment rack and check alignment specifications.
When recording rear toe-in (vehicle backed onto
alignment rack) REMEMBER to reverse sign
convention; a total toe-in on direct reading
charts is actually toe-out while driving. Maintain
rear alignment within Chrysler Motors recommenda-
tions, found in Specifications.
INSTALLATION OF REAR ALIGNMENT SHIMS
(1) Block front tires so vehicle will not move.
(2) Release parking brake.
(3) Hoist vehicle so that rear suspension is in full
rebound and tires are off the ground. See Hoisting in
Lubrication and Maintenance, Group 0. (4) Remove wheel and tire assembly.
(5) Pry off grease cap.
(6) Remove cotter pin and castle lock.
(7) Remove adjusting nut.
(8) Remove brake drum (Fig. 1). (9) Loosen four (4) brake assembly and spindle
mounting bolts enough to allow clearance for shim
installation (Fig. 2). Do not remove mounting
bolts.
(10) Install shims as shown in Figs. 3, 4, 5 and 6
for desired wheel change. No more than two shims
on each spindle should be used to bring alignment
within acceptable range. Wheel change by .3É per shim.
(11) Tighten down the 4 brake support plate and
spindle to axle mounting bolts until they are snug.
Then tighten the 4 bolts to the torque values listed
for the vehicle line which is being serviced.
² AA, AG, AJ, AP Bodies 75 N Im (55 ft. lbs.)
Fig. 2 Loosen Mounting Bolts
Fig. 3 Shim Installation for Toe-Out
Fig. 1 Remove Brake Drum
Ä SUSPENSION AND DRIVESHAFTS 2 - 89
Page 225 of 2438
ABS EQUIPPED VEHICLE PERFORMANCE
Anti-Lock Brakes provide the driver with some
steering control during hard braking. However there
are conditions where the system does not provide any
benefit. In particular, hydroplaning is still possible
when the tires ride on a film of water. Hydroplaning
results in the vehicle tires leaving the road surface
rendering the vehicle almost uncontrollable. In addi-
tion, extreme steering maneuvers at high speed or
high speed cornering beyond limits of tire adhesion
to the road surface may cause vehicle skidding. So,
the ABS system is termed Anti-Lock instead of Anti-
Skid. One of the significant benefits of the ABS system is
that of maintaining steering control during hard
braking or during braking on slippery surfaces. It is
therefore possible to steer the vehicle while braking
on almost any road surface.
ABS SYSTEM SELF-DIAGNOSTICS
The ABS system has been designed with Self Diag-
nostic Capability. There are two self checks the sys-
tems performs every time the vehicle is started.
First, when the key is turned on the system performs
an electrical check called Start-Up Cycle. During this
check, the Red Brake Warning Lamp and the Amber
Anti-Lock Warning Lamp are illuminated. Then
turned off at the end of the test, after about 1 to 2
seconds. When the vehicle reaches a speed of about 3
to 4 miles per hour. The system performs a func-
tional check called Drive-Off. During Drive-Off. hy-
draulic valves are activated briefly to test their
function. Drive-Off can be detected as a series of
rapid clicks upon driving off the first time the car is
started. If the brake pedal is applied during Drive-
Off, the test is by-passed. Both of these conditions
are a normal part of the system self test. Most fault
conditions will set a ABS Fault Code in the (CAB),
which can be retrieved to aid in fault diagnosis. De-
tails can be found in Diagnosis Section.
ABS WARNING SYSTEMS OPERATION
The ABS system uses two methods for notifying
the driver of a system malfunction. These include the
standard Red Brake Warning Lamp and an Amber
Anti-Lock Warning Lamp, both located in the instru-
ment cluster. The purpose of these two lamps are dis-
cussed in detail below.
RED BRAKE WARNING LAMP
The Red Brake Warning Lamp, located in the in-
strument cluster, will Turn On to warn the driver of
brake system conditions that may result in reduced
braking ability. The lamp is also turned on when the
parking brake is not fully released. Conditions which
may cause the Red Brake Warning Lamp to Turn On
include: ²
Parking brake not fully released. If the parking
brake is applied or not fully released. The switch on the
parking brake pedal assembly will ground the Red
Brake Warning Lamp circuit and cause the lamp to
turn on. On vehicles equipped with mechanical instru-
ment clusters, the Amber Anti-Lock Lamp will turn on
if the vehicle is driven above 3 miles per hour with the
Parking Brake applied.
² Low brake fluid. The fluid level sensor in the hy-
draulic assembly reservoir will ground the Red Brake
Warning Lamp circuit if low brake fluid level is de-
tected. In addition, ABS will be deactivated above 3
miles per hour and the Amber Anti-Lock Warning
Lamp will be illuminated. If the vehicle is equipped
with EVIC, a low fluid condition will also cause the
Low Brake Fluid message to appear.
² Low Accumulator Pressure. In the event of low
accumulator pressure, the dual function pressure
switch in the hydraulic assembly will signal the (CAB)
to ground the Red Brake Warning Lamp circuit. This
will cause the Red Brake Warning Lamp to turn on.
Low accumulator pressure also results in the activa-
tion of the Yellow Anti-Lock Warning Lamp. Low accu-
mulator pressure may result in loss of power assist.
² Modulator Or (CAB) Faults. The modulator assem-
bly or (CAB) may turn on the Yellow Anti-Lock Warn-
ing Lamp, if certain faults are detected in either the
modulator assembly or the (CAB).
² Bulb check. As a bulb check, the Red Brake Warning
Lamp will illuminate whenever the ignition switch is
placed in the crank position. Illumination of the red Brake Warning Lamp
may indicate reduced braking ability. A vehicle
that has the Red Brake Warning Lamp ON should
not be driven except to do diagnostic procedures
described in Section 2 of this manual. Most con-
ditions that turn on the Red Brake Warning
Lamp will also turn on the Amber Anti-Lock
Warning Lamp, consequently disabling the Anti-
Lock function.
ANTI-LOCK WARNING LAMP
The Anti-Lock Warning Lamp is located in the in-
strument cluster and is Amber in color. The Amber
Anti-Lock Warning Lamp is illuminated when the
(CAB) detects a condition that results in a shutdown of
Anti-Lock function. The Amber Anti-Lock Warning
Lamp is normally on until the (CAB) completes its self
tests and turns the lamp off. For example, if the (CAB)
is disconnected, the lamp is on. Display of the Amber Anti-Lock Warning Lamp
without the Red Brake Warning Lamp indicates
only that Anti-Lock function has been disabled.
Power assisted normal braking is unaffected.
Ä ANTI-LOCK 10 BRAKE SYSTEM 5 - 75
Page 230 of 2438
stant velocity joint housings. The rear Tone Wheels
are serviced as an assembly with the rear disc brake
rotor hub. Correct Anti-Lock System operation is dependent
on wheel speed signals from the wheel speed sensors.
The vehicles' wheels and tires must all be the same
size and type to generate accurate signals. In addi-
tion, the tires must be inflated to the recommended
pressures for optimum system operation. Variations
in wheel and tire size or significant variations in in-
flation pressure can produce inaccurate wheel speed
signals.
CONTROLLER ANTI-LOCK BRAKE (CAB)
The Anti-Lock Brake Controller is a small micro-
processor based device that monitors the brake sys- tem and controls the system while it functions in
Anti-Lock Mode. The CAB is located under the bat-
tery tray and is mounted to the left frame rail (Fig.
7) and uses a 60-way system connector. The power
source for the CAB is through the ignition switch to
pin 60 of the controller. With the ignition in the
RUN or ON position. IF THE (ABS) CONTROL-
LER NEEDS TO BE REPLACED BE SURE THE
CORRECT CONTROLLER IS USED. THE CON-
TROLLER ANTI-LOCK BRAKE (CAB) IS NOT
ON THE CCD BUS
Fig. 5 Rear Wheel Speed Sensor
Fig. 4 Front Wheel Speed Sensor
Fig. 6 Rear Tone Wheel
Fig. 7 Location Controller Anti-Lock Brake (CAB)
5 - 80 ANTI-LOCK 10 BRAKE SYSTEM Ä