1993 CHEVROLET PLYMOUTH ACCLAIM ECU

DRIVESHAFT IDENTIFICATION
Driveshafts are identified by the manufacturer. Vehi-
cles can be equipped with any of these driveshaft as-
semblies. Each assembly can be identified as shown in
(Fig. 2).
SERVICE PROCEDURES
Procedures for the removal and installation of the
driveshafts are essentially the same for all front
wheel drive vehicles. Each driveshaft has a spring
within the inboard Tripod C/V joint that maintains
constant engagement with the transaxle. This allows
the drive shaft to be removed without dismantling
part of the transaxle.
CAUTION: Boot sealing is vital to retain special lu-
bricants and to prevent foreign contaminants from
entering the C/V joint. Mishandling, such as allow-
ing the assemblies to dangle unsupported, pulling
or pushing the ends can cut boots or damage C/V
joints. During removal and installation procedures
always support both ends of the driveshaft to pre-
vent damage.
DRIVESHAFTS, REMOVE INSTALL
HUB NUT REMOVAL
Hub nut removal and installation is the same for
all front wheel drive vehicles. For installation see
Hub Nut Assemblies Install. (1) Remove cotter pin, lock and spring washer (Fig.
3).
(2) Loosen hub nut and wheel nuts while vehicle is
on floor and brakes applied (Fig. 4). (3) Raise vehicle, see Hoisting in Lubrication and
Maintenance, Group 0 of this service manual. (4) Remove hub nut, washer, wheel and tire as-
sembly (Fig. 5).
DRIVESHAFT ASSEMBLIES REMOVE
Inboard C/V joints have stub shafts splined into the
differential side gears, or splined into the intermedi-
ate shaft on the right side of an equal length system.
Driveshafts are retained in the side gears by a con-
stant spring force provided by a spring contained
within the inboard C/V joints. (1) For removal of right driveshaft, the speedome-
ter pinion must be removed BEFORE shaft removal
(Fig. 6). (2) Remove clamp bolt securing ball joint stud into
steering knuckle (Fig. 7). (3) Separate ball joint stud from steering knuckle
by prying against knuckle leg and control arm.
CAUTION: Do not damage ball joint or C/V joint
boots (Fig. 8). (4) Separate outer C/V joint splined shaft from hub
by holding C/V housing while moving knuckle(hub)
assembly away (Fig. 9).
Fig. 3 Remove Cotter Pin, Nut Lock, & Spring Washer
Fig. 4 Loosen Hub Nut & Wheel Nuts
Fig. 5 Remove Hub Nut & Washer Loosen Shaft
Ä SUSPENSION AND DRIVESHAFTS 2 - 27

CAUTION: Do not pry on or otherwise damage wear
sleeve on outer C/V joint. (5) Support assembly at C/V joint housings. Re-
move by pulling outward on the inner joint housing. DO NOT PULL ON SHAFT (Figs. 10 and 11).
The driveshaft, when installed, acts as a bolt and
secures the hub/bearing assembly. If the vehicle is to
be supported or moved on its wheels, install a bolt
through the hub to ensure that the hub bearing as-
sembly cannot loosen.
DRIVESHAFT ASSEMBLIES INSTALL
CAUTION: See Wear Sleeve and Seal Lubrication in
Front Suspension and at end of this Group BE-
FORE driveshaft installation.
Fig. 6 Remove Speedometer Pinion Clamp (For Right Driveshaft).
Fig. 7 Remove Ball Joint to Steering Knuckle Clamp Bolt
Fig. 8 Separate Ball Joint from Knuckle
Fig. 9 Separate Outer C/V Joint Shaft from Hub
Fig. 10 Removing Driveshaft Assembly UnequalLength
2 - 28 SUSPENSION AND DRIVESHAFTS Ä

CAUTION: Do not dent or bend the slinger during
this installation, since it could prevent the bearing
assembly from seating properly. (2) Press bearing assembly into position on the
shaft, there should be a minimum of 1 mm (1/32 in.)
clearance between slinger and bearing assembly
when properly installed.
CAUTION: Apply pressure only to the inner race of
the bearing during this procedure. Or damage may
result which could cause premature bearing failure. (3) Press the outer slinger into place with the
same tool used for bearing installation. The slinger
must bottom out on the shoulder of the shaft.
INTERMEDIATE SHAFT ASSEMBLY
Install
(1) Securely fasten bracket to bearing assembly
and tighten to 28 N Im (21 ft. lbs.) torque (Fig. 7)
(Also see Fig. 1).
(2) Hold the stub yoke while aligning and guiding
the splined end into the transaxle (Fig. 8).
Fig. 4 Disassemble Universal Joint
Fig. 5 Assemble Universal Joint
Fig. 6 Slinger Installation Intermediate Shaft
Fig. 7 2.5L Turbo III Intermediate Driveshaft Bracket
Ä SUSPENSION AND DRIVESHAFTS 2 - 43

BRAKE HOSE AND TUBING
INSPECTION OF BRAKE HOSE AND TUBING
Flexible rubber hose is used at both front brakes and
at the rear axle. Inspection of brake hoses should be
performed whenever the brake system is serviced and
every 7,500 miles or 12 months, whichever comes first
(every engine oil change). Inspect hydraulic brake
hoses for severe surface cracking, scuffing, or worn
spots. Should the fabric casing of the rubber hose be
exposed due to cracks or abrasions in the rubber hose
cover, the hose should be replaced immediately. Even-
tual deterioration of the hose can take place with
possible burst failure. Faulty installation can cause
twisting and wheel, tire or chassis interference. The steel brake tubing should be inspected periodi-
cally for evidence of physical damage or contact with
moving or hot components.
INSTALLATION OF BRAKE HOSE
Always use factory recommended brake hose to en-
sure quality, correct length and superior fatigue life.
Care should be taken to make sure that the tube and
hose mating surfaces are clean and free from nicks and
burrs. Front right and left side hoses are not
interchangeable. Connections should be correct and properly made.
Use new copper seal washers on all connections using
Banjo Bolts and tighten all fittings to their specified
torques. The flexible front hydraulic brake hose should al-
ways be installed on the vehicle by first attaching the
Banjo connector to the caliper assembly. Then bolt the
intermediate hose bracket to the strut assembly allow-
ing the bracket to position the hose to prevent twisting.
Attach the hose to the body bracket and steel brake
tubing. Tighten all fittings to specified torque. The
body bracket and hose end are keyed so that they will
only fit one way. Install rear brake hoses first to the trailing arm
tubes and then to the floor pan tubes. Minimize hose
twisting. Vehicles equipped with rear disc brakes have
brake hoses attached to the caliper on each side. The
brake hose should be first attached by the Banjo bolt to
the caliper and then secured to the hose bracket with
the retaining clip. The attach the steel brake tubing to
the hose fitting.
REPAIR AND INSTALLATION OF BRAKE TUB- ING
Only double wall 4.75mm (3/16 in.) steel tubing
should be used for replacement. Care should be taken
when replacing brake tubing, to be sure the proper
bending and flaring tools and procedures are used, to
avoid kinking. Do not route the tubes against sharp edges, moving components or into hot areas. All
tubes should be properly attached with recommended
retaining clips.
TYPES OF TUBING FLARES
Two different tubing flares (Fig. 13) are used on 93
M.Y. vehicles. On some ABS brake systems the tub-
ing connections made to the hydraulic assembly use
an ISO flare. All other ABS brake system compo-
nent, tubing connections are made using a double in-
verted flare. On non-ABS brake systems all
component tubing connections use only the double in-
verted flare. No ISO flares are used.
CAUTION: ALWAYS USE THE PROPER FLARING
TOOL AND PROCEDURE, FOR THE TYPE OF
BRAKE SYSTEM THAT IS BEING SERVICED TO IN-
SURE THE INTEGRITY OF THE HYDRAULIC SYS-
TEM.
TO REPAIR OR FLARE TUBING
Using Tubing Cutter, Special Tool C-3478-A or
equivalent, cut off damaged seat or tubing (Fig. 14).
Ream out any burrs or rough edges showing on in-
side of tubing (Fig. 15). This will make the ends of
tubing square (Fig. 15) and ensure better seating of
flared end tubing. PLACE TUBE NUT ON TUB-
ING BEFORE FLARING THE TUBING.
DOUBLE INVERTED TUBING FLARES.
To make a double inverted tubing flare (Fig. 13 &
16). Open handles of Flaring Tool, Special Tool
C-4047 or equivalent. Then rotate jaws of tool until
the mating jaws of tubing size are centered between
vertical posts on tool. Slowly close handles with tub-
Fig. 13 Identifying Hydraulic Brake Tubing Flares
Ä BRAKES 5 - 11

PUMP/MOTOR SERVICE (FIG. 4)
REMOVE (1) Fully de-pressurize the hydraulic accumulator
by pumping the pedal a minimum of 40 times. Use
the procedure described in De-Pressurizing Hydraulic
Accumulator listed earlier in this section.
WARNING: FAILURE TO DE-PRESSURIZE HYDRAU-
LIC ACCUMULATOR, BEFORE PERFORMING THIS
OPERATION, MAY RESULT IN PERSONAL INJURY
AND/OR DAMAGE TO PAINTED SURFACES.
(2) Remove the fresh air intake ducts from the en-
gine induction system. (3) Loosen the low pressure hose clamp (Fig. 5) at
the hydraulic assembly. (4) Disconnect any routing clips which attach the
high and low pressure fluid lines to the body or com-
ponents of the vehicle (Fig. 5). (5) Unclip the pump/motor assembly wiring har-
ness electrical connector from the left side engine
mount (Fig. 5). Disconnect the pump/motor assembly
wiring harness from the underhood wiring harness. (6) Loosen the high pressure hose tube nut at the
hydraulic assembly fitting (Fig. 5). (7) Remove the high and low pressure hose assem-
bly (Fig. 5) from the hydraulic assembly. Cap all
open ports on reservoir and hydraulic assembly to
prevent brake fluid from leaking out. (8) Remove the pump/motor assembly front heat
shield to mounting bracket attaching bolt, from front
of pump/motor bracket (Fig. 5). (9) Remove front heat shield from the pump/motor
assembly. (10) Lift pump/motor assembly from mounting
bracket and remove assembly from the vehicle.
INSTALL
CAUTION:Be sure all high and low pressure hose
routing clips. Are securely fastened to the vehicle
body or component they were removed from when
hose assembly is reinstalled (Fig. 5).
(1) Install pump/motor assembly in reverse order of
removal. (2) Tighten the pump/motor assembly fluid lines to
the torque values shown below.
² Low pressure hose clamp. 1 N Im (10 in. lbs.)
² High pressure hose fitting to pump/motor assembly.
16 N Im (145 in. lbs.) Fig. 5.
Note: It is not necessary to bleed the founda-
tion brakes of the vehicle when the pump/motor
assembly and high and low pressure fluid hoses
are serviced. Any other service to the brake
system unless stated otherwise will require
bleeding of the complete brake system.
BRAKE FLUID PRESSURE AND RETURN HOSES (FIG. 6)
REMOVE
(1) Remove the pump/motor assembly from its
mounting bracket, see Pump/Motor Service. (2) Cut the 4 tie straps that secure the high and low
pressure hoses and pump/motor assembly wiring har-
ness together Fig. 6. (3) Remove the banjo bolt and spray shield from the
pump/motor assembly Fig. 6.
Fig. 4 Pump/Motor Assembly MountingFig. 5 Brake Tube and Hose Routing
5 - 96 ANTI-LOCK 10 BRAKE SYSTEM Ä

SYSTEM RELAY, ANTI-LOCK WARNING LAMP RELAY AND PUMP/MOTOR RELAYS (FIG. 2)
REMOVE
See (Fig. 2) Power Distribution Center. Find the lo-
cation of the pump/motor relay in the (PDC). Remove
pump/motor relay by pulling upward and install by
pushing firmly into position. Do not twist the relay
when removing or installing it. See (Fig. 10) in the Relay And Warning Lamp Sec-
tion of this group, for the location of the Anti-Lock
system relay and the Yellow Lamp relay. Remove
the relay from the vehicle using the following proce-
dure. (1) Disconnect the wiring harness connectors from
the relays. Connectors are removed from the relays
by disengaging the connector locking tab from relay
and pulling strait off relay, do not twist. (2) Then remove the relay pack to inner fender at-
taching bolt.
INSTALL The Anti-Lock system and Yellow Lamp relay are
installed using the following procedure. (1) Mount the relay pack to the inner fender with
the anti-rotation tab on the bracket around lip of in-
ner fender hole (Fig. 10). (2) Install the relay pack to inner fender mounting
bolt and torque to 4 N Im (35 in. lbs.). (3) Connect the wiring harness connectors onto the
relays until the locking tabs on the connectors and
relays are fully engaged. Do not twist connectors when
installing them on the relays.
WHEEL SPEED SENSORS
INSPECTION
Inspect tone wheels (Fig. 3) for any missing or broken
teeth, this can cause erratic speed sensor signals.
Tone wheels should show no evidence of contact with
the wheel speed sensor. If contact was made, determine
cause and correct. Excessive runout of the tone wheels can cause erratic
wheel speed sensor signals. Replace assembly if runout
exceeds approximately 0.25 mm (0.010 inch).
FRONT WHEEL SPEED SENSOR
REMOVAL
(1) Raise vehicle and remove front wheel and tire
assembly. (2) Remove screw from clip (Fig. 4) that holds sensor
assembly grommet into fender shield. (3) Carefully, pull sensor assembly grommet from
fender shield. When removing grommet from
fender shield, do not pull on speed sensor cable. (4) Unplug speed sensor cable connector, from ve-
hicle wiring harness. (5) Remove the 2 screws (Fig. 4) that secure the
speed sensor cable, routing tube to the fender well. (6) Remove the 2 sensor assembly grommets from
the retainer bracket, on the strut damper (Fig. 4). (7) Remove speed sensor assembly to steering
knuckle attaching bolt (Fig. 4). (8) Carefully, remove sensor head from steering
knuckle. If the sensor has seized, due to corrosion, use
a hammer and punch to tap edge of sensor ear
Fig. 2 Pump/Motor and Anti-Lock System Relays
Fig. 3 Tone Wheel (Typical)
5 - 104 ANTI-LOCK 10 BRAKE SYSTEM Ä

(10) Using approved battery jumper cables, attach
battery, to the vehicles negative and positive battery
cables (Fig. 17). (11) Bleed the vehicles base brake and Antilock
brake hydraulic systems. Refer to Bleeding Bendix
Antilock 4 Brake System in this service manual
supplement for required bleeding procedure. (12) Install the battery acid shield (Fig. 18) onto
modulator assembly. Be sure acid shield is securely
attached to modulator assembly before installing
battery tray. (13) Install battery tray in vehicle. Then install the 4
bolts (Fig. 19) attaching battery tray to inner fender
and frame rail. Torque the 4 attaching bolts to 20 N Im
(175 in.lbs.). (14) If equipped, install speed control vacuum reser-
voir on battery tray. Then install the 2 speed control
vacuum reservoir attaching bolts (Fig. 20). Torque the
vacuum reservoir to attaching bolts to 4 N Im (30 in.
lbs.). (15) Install battery tray access cover (Fig. 21) on
battery tray. The access cover MUST be back on
battery tray, before battery is installed in battery
tray. (16) Install battery on battery tray. Then install and
securely tighten battery hold down clamp (Fig. 22).
Then install battery heat shield, on battery (Fig. 22). (17) Install battery cables on battery. Securely
tighten clamping bolts on battery cable terminals.
Fig. 15 Hydraulic Brake Line Connections at Modulator Assembly
Fig. 16 Torquing Brake Line Connections To Modulator Assembly
Fig. 17 Battery Connected To Vehicle For Bleeding Modulator Assembly
Fig. 18 Modulator Assembly Acid Shield Installed
Ä ANTILOCK 4 BRAKE SYSTEM 5 - 33

Antilock 4 Brake System in this service manual
supplement for required bleeding procedure.(9) Install battery acid shield (Fig. 14) onto the ABS
modulator assembly. Be sure acid shield is securely
attached to modulator assembly before installing
battery tray. (10) Install battery tray into vehicle. Then install
the 4 bolts (Fig. 15) attaching battery tray to inner
fender and frame rail. Torque the 4 battery tray attach-
ing bolts to 20 N Im (175 in.lbs.).
(11) If equipped, install speed control vacuum reser-
voir on battery tray. Install the 2 speed control vacuum
reservoir attaching bolts (Fig. 16). Torque the 2
vacuum reservoir attaching bolts to 4 N Im (30 in. lbs.).
(12) Install battery tray access cover (Fig. 17) on
bottom of battery tray. The access cover MUST be
on battery tray, before battery is installed. (13) Install battery on battery tray. Then install
and securely tighten the battery hold down clamp
(Fig. 18). Then install battery heat shield, on battery
(Fig. 18). (14) Install battery cables on battery. Securely
tighten clamping bolts on battery cable terminals. (15) Reset any electrical components of the vehicle
which were affected by the removal of the battery. (16) Road test vehicle to verify correct operation of
the vehicles's base and Antilock brake systems.
Fig. 13 Battery Connected To Vehicle For Bleeding Modulator Assembly
Fig. 14 Modulator Assembly Acid Shield Installed
Fig. 11 Hydraulic Brake Line Connections atModulator Assembly
Fig. 12 Torquing Brake Line Connections To Modulator Assembly
Ä ANTILOCK 4 BRAKE SYSTEM 5 - 37