1996 CHRYSLER VOYAGER suspension

(13) Lower the vehicle to the ground.Be sure
that the suspension is supporting the full
weight of the vehicle.
(14) Tighten the spring to front hanger pivot bolts
to a torque of 156 N´m (115 ft. lbs.).
(15) Tighten the shock absorber mounting bolts to
a torque of 101 N´m (75 ft. lbs.).
(16) Tighten the track bar mounting bolt to a
torque of 95 N´m (70 ft. lbs.).
(17) Road test vehicle to ensure that the prema-
ture rear wheel lockup condition has been corrected.
SPECIFICATIONS
BRAKE FLUID
The brake fluid used in this vehicle must conform
to DOT 3 specifications and SAE J1703 standards.No other type of brake fluid is recommended or
approved for usage in the vehicle brake system. Use
only Mopar brake fluid or an equivalent from a
tightly sealed container.
CAUTION: Never use reclaimed brake fluid or fluid
from an container which has been left open. An
open container will absorb moisture from the air
and contaminate the fluid.
CAUTION: Never use any type of a petroleum-
based fluid in the brake hydraulic system. Use of
such type fluids will result in seal damage of the
vehicle brake hydraulic system causing a failure of
the vehicle brake system. Petroleum based fluids
would be items such as engine oil, transmission
fluid, power steering fluid ect.
VEHICLE BRAKE SYSTEM COMPONENT SPECIFICATIONS
Brake System Component Specifications
5 - 82 BRAKESNS
ADJUSTMENTS (Continued)

BRAKE ACTUATION SYSTEM
ACTUATION:
Vacuum Operated Power Brakes.........Standard
Hydraulic System...........Dual-Diagonally Split
Antilock Brake Sytem (Teves Mark-20)...........
MASTER CYLINDER ASSEMBLY:
Supplier..............................Bosch
Type For Non-ABSAnd
ABS Brakes. . . .Conventional Compensating Port
Type For ABS Brakes
With Traction Control . . .Dual Center Port Design
Body Material...............Anodized Aluminum
Reservoir Material................Polypropelene
MASTER CYLINDER BORE /
STROKE AND SPLIT:
ABS W/Disc/Drum Brakes......23.8 mm x 36 mm
(.937 in. x 1.47 in.)
AWD W/Disc/Disc Brakes........25.4 mm x 39 mm
(1.00 in. x 1.50 in.)
Displacement Split.....................50/50
MASTER CYLINDER FLUID OUTLET PORTS:
Non-ABS And ABS . . .Primary 7/16±24 Secondary 7/
16±24
ABS With Traction Control.......Primary M12 x 1
Secondary M12 x 1
Outlet Fitting Type Non-ABS
AndABS...........Double Wall Inverted Flare
Outlet Fitting Type ABS With
Traction Control...................ISO Flare
ABS HYDRAULIC CONTROL UNIT:
Hydraulic Tube Fitting Type............ISO Flare
BOOSTER:
Make/Type.................Bosch Vacuum Assist
Mounting Studs.....................M8x1.25
Type .........................270 ZLT RSMV
Boost At 20 inches Of
Manifold Vacuum...........3800 N´m (850 lbs.)
PROPORTIONING VALVE:
Material...........................Aluminum
Function....................Hydraulic Pressure
Proportioning To Rear Brakes
BRAKE PEDAL
Pedal Ratio.............................3.36
BRAKE FASTENER TORQUE SPECIFICATIONS
DESCRIPTION TORQUE
BRAKE TUBES:
Tube Nuts To Fittings And
Components..............17N´m(145 in. lbs.)
BRAKE HOSE:
To Caliper Banjo Bolt..........48N´m(35ft.lbs.)
Intermediate Bracket.........12N´m(105 in. lbs.)
MASTER CYLINDER:
To Vacuum Booster
Mounting Nut............25N´m(225 in. lbs.)
FIXED PROPORTIONING VALVE:
To Frame Rail Attaching
Bolts....................14N´m(125 in. lbs.)
HEIGHT SENSING PROPORTIONING VALVE:
To Mounting Bracket
Attaching Bolts...........23N´m(200 in. lbs.)
Actuator Assembly
Adjustment Nut.............5N´m(45in.lbs.)
Mounting Bracket To Frame
Rail Bolts................17N´m(150 in. lbs.)
JUNCTION BLOCK (NON-ABS BRAKES)
To Suspension Cradle
Mounting Bolt............28N´m(250 in. lbs.)
VACUUM BOOSTER:
To Dash Panel Mounting
Nuts....................28N´m(250 in. lbs.)
REAR WHEEL CYLINDER:
To Support Plate Mounting
Bolts.....................8N´m(75in.lbs.)
Bleeder Screw...............10N´m(80in.lbs.)
BRAKE SUPPORT PLATE:
To Rear Axle Mounting Bolts . . .130 N´m (95 ft. lbs.)
DISC BRAKE CALIPER:
Guide Pin Bolts..............41N´m(30ft.lbs.)
Bleeder Screw..............15N´m(125 in. lbs.)
ABS HYDRAULIC CONTROL UNIT:
Mounting Bracket To
Suspension Cradle Bolts.....28N´m(250 in. lbs.)
To Mounting Bracket Isolator
Attaching Bolts............11N´m(97in.lbs.)
CAB To HCU Mounting Screws . . .2 N´m (17 in. lbs.)
WHEEL SPEED SENSOR:
To Axle Or Steering Knuckle
Mounting Bolt............12N´m(105 in. lbs.)
PARKING BRAKE:
Pedal Assembly Mounting
Bolts....................28N´m(250 in. lbs.)
REAR HUB AND BEARING:
To Axle Mounting Bolts........129 N´m (95 ft. lbs.)
WHEEL:
Stud Lug Nut........115±156 N´m (84-115 ft. lbs.)
NSBRAKES 5 - 83
SPECIFICATIONS (Continued)

ABS BRAKES OPERATION AND VEHICLE
PERFORMANCE
This ABS System represents the current state-of-
the-art in vehicle braking systems and offers the
driver increased safety and control during braking.
This is accomplished by a sophisticated system of
electrical and hydraulic components. As a result,
there are a few performance characteristics that may
at first seem different but should be considered nor-
mal. These characteristics are discussed below.
NORMAL BRAKING SYSTEM FUNCTION
Under normal braking conditions, the ABS System
functions the same as a standard brake system with
a diagonally split master cylinder and conventional
vacuum assist.
ABS SYSTEM OPERATION
If a wheel locking tendency is detected during a
brake application, the brake system will enter the
ABS mode. During ABS braking, hydraulic pressure
in the four wheel circuits is modulated to prevent
any wheel from locking. Each wheel circuit is
designed with a set of electric solenoids to allow mod-
ulation, although for vehicle stability, both rear
wheel solenoids receive the same electrical signal.
During an ABS stop, the brakes hydraulic system
is still diagonally split. However, the brake system
pressure is further split into four control channels.
During antilock operation of the vehicle's brake sys-
tem the front wheels are controlled independently
and are on two separate control channels and the
rear wheels of the vehicle are controlled together.
The system can build and release pressure at each
wheel, depending on signals generated by the wheel
speed sensors (WSS) at each wheel and received at
the Controller Antilock Brake (CAB).
ABS operation is available at all vehicle speeds
above 3 to 5 mph. Wheel lockup may be perceived at
the very end of an ABS stop and is considered nor-
mal.
VEHICLE HANDLING PERFORMANCE DURING
ABS BRAKING
It is important to remember that an antilock brake
system does not shorten a vehicle's stopping distance
under all driving conditions, but does provide
improved control of the vehicle while stopping. Vehi-
cle stopping distance is still dependent on vehicle
speed, weight, tires, road surfaces and other factors.
Though ABS provides the driver with some steer-
ing control during hard braking, there are conditions
however, where the system does not provide any ben-
efit. In particular, hydroplaning is still possible when
the tires ride on a film of water. This results in the
vehicles tires leaving the road surface rendering the
vehicle virtually uncontrollable. In addition, extremesteering maneuvers at high speed or high speed cor-
nering beyond the limits of tire adhesion to the road
surface may cause vehicle skidding, independent of
vehicle braking. For this reason, the ABS system is
termed Antilock instead of Anti-Skid.
NOISE AND BRAKE PEDAL FEEL
During ABS braking, some brake pedal movement
may be felt. In addition, ABS braking will create
ticking, popping and/or groaning noises heard by the
driver. This is normal due to pressurized fluid being
transferred between the master cylinder and the
brakes. If ABS operation occurs during hard braking,
some pulsation may be felt in the vehicle body due to
fore and aft movement of the suspension as brake
pressures are modulated.
At the end of an ABS stop, ABS will be turned off
when the vehicle is slowed to a speed of 3±4 mph.
There may be a slight brake pedal drop anytime that
the ABS is deactivated, such as at the end of the stop
when the vehicle speed is less then 3 mph or during
an ABS stop where ABS is no longer required. These
conditions will exist when a vehicle is being stopped
on a road surface with patches of ice, loose gravel or
sand on it. Also stopping a vehicle on a bumpy road
surface will activate ABS because of the wheel hop
caused by the bumps.
TIRE NOISE AND MARKS
Although the ABS system prevents complete wheel
lock-up, some wheel slip is desired in order to
achieve optimum braking performance. Wheel slip is
defined as follows, 0 percent slip means the wheel is
rolling freely and 100 percent slip means the wheel is
fully locked. During brake pressure modulation,
wheel slip is allowed to reach up to 25 to30%. This
means that the wheel rolling velocity is 25 to 30%
less than that of a free rolling wheel at a given vehi-
cle speed. This slip may result in some tire chirping,
depending on the road surface. This sound should not
be interpreted as total wheel lock-up.
Complete wheel lock up normally leaves black tire
marks on dry pavement. The ABS System will not
leave dark black tire marks since the wheel never
reaches a fully locked condition. Tire marks may
however be noticeable as light patched marks.
START UP CYCLE
When the ignition is turned on, a popping sound
and a slight brake pedal movement may be noticed.
Additionally, when the vehicle is first driven off a
humming may be heard and/or felt by the driver at
approximately 20 to 40 kph (12 to 25 mph). The ABS
warning lamp will also be on for up to 5 seconds
after the ignition is turned on. All of these conditions
are a normal function of ABS as the system is per-
forming a diagnosis check.
5 - 86 BRAKESNS
DESCRIPTION AND OPERATION (Continued)

The ICU is located on the driver's side of the vehi-
cle, and is mounted to the front suspension cradle
(Fig. 3). TheABS onlyICU contains the following
components for controlling the brake system hydrau-
lic pressure during ABS braking: The CAB, eight
valve solenoids, (four inlet valves and four outlet
valves) fluid accumulators a pump, and an electric
motor. TheABS with traction controlICU con-
tains the following components for controlling the
brake system hydraulic pressure during ABS braking
and traction control operation: The CAB, four sole-
noid controlled inlet valves, four solenoid controlled
outlet valves, two hydraulic shuttle valves, two ASR
valves, fluid accumulators a pump and an electric
motor. Also attached to the hydraulic control unit are
the master cylinder primary and secondary brake
tubes and the brake tubes going to each wheel of the
vehicle. (Fig. 3).
CAUTION: No components of the ICU are service-
able. If any component that makes up the ICU is
diagnosed as not functioning properly it MUST be
replaced. The replaceable components of the ICU,
are the HCU and the CAB (Fig. 2) and (Fig. 3). The
mounting bracket is also replaceable as a separate
component of the ICU. The remaining components
of the ICU are not serviceable items. No attempt
should ever be made to remove or service any indi-
vidual components of the HCU. This is due to the
concern of contamination entering the HCU while
performing a service procedure. Also no attempt
should ever be made to remove or service any indi-
vidual components of the CAB.
CAUTION: At no time when servicing the ICU
should a 12 volt power source be applied to any
electrical connector of the HCU or the CAB.INLET VALVES AND SOLENOIDS
There are four inlet solenoids, one for each wheel.
In the released position they provide a fluid path
from the master cylinder to the wheel brakes of the
vehicle. When the ABS cycle has been completed the
inlet solenoids will return to their released (open)
position.
OUTLET VALVES AND SOLENOIDS
There are four outlet solenoids, one for each wheel.
In the released position they are closed to allow for
normal braking. In the actuated (open) position, they
provide a fluid path from the wheel brakes of the
vehicle to the hydraulic control unit HCU accumula-
tors and pump motor. The outlet solenoids are spring
loaded in the released (closed) position during normal
braking.
ASR VALVE (ABS WITH TRACTION CONTROL
ONLY)
On vehicles equipped with ABS having traction
control, there are two special ASR valves located in
the HCU portion of the ICU. The ASR valves are a
normally open type valve and are solenoid actuated.
The special ASR valves are used to isolate the rear
(non-driven) wheels of the vehicle from the hydraulic
pressure that the HCU pump motor is sending to the
front (driven) wheels, when the traction control sys-
tem is in operation. The rear brakes need to be iso-
lated from the master cylinder when traction control
is in operation so that the HCU can build the
required hydraulic pressure to the front brakes.
HCU BRAKE FLUID ACCUMULATORS AND NOISE
DAMPING CHAMBER
There are two brake fluid accumulators in the
HCU. There is one brake fluid accumlator for the pri-
mary and secondary hydraulic circuits. The brake
Fig. 2 Teves Mark 20 ICUFig. 3 ICU Mounting Location
5 - 88 BRAKESNS
DESCRIPTION AND OPERATION (Continued)

hoist. See Hoisting in the Lubrication And Mainte-
nance section of this service manual.
(4) Remove the routing clip attaching the HCU
wiring harness to the HCU mounting bracket (Fig.
19).
CAUTION: Do not apply a 12 volt power source to
any terminals of the 25 way HCU connector when
disconnected.
(5) Remove the 25 way connector (Fig. 19) from
the CAB. The 25 way connector is removed from the
CAB using the following procedure. Grasp the lock
on the 25 way connector (Fig. 19) and pull it as far
out as possible (Fig. 20). This will raise and unlock
the 25 way connector from the socket on the CAB.
CAUTION: Before removing the brake tubes from
the HCU, the HCU must be thoroughly cleaned. This
must be done to prevent dirt particles from falling
into the ports of HCU or entering the brake tubes.(6) Thoroughly clean all surfaces of the HCU, and
all brake tube nuts located on the HCU. Use only a
solvent such as Mopar Brake Parts Cleaner or an
equivalent to clean the HCU.
(7) Remove the brake tubes (6) from the inlet and
outlet ports on the HCU. (Fig. 21).
(8) Remove the 3 bolts (Fig. 22) attaching the
HCU mounting bracket to the front suspension cross-
member.
(9) Remove HCU and the mounting bracket as a
unit from the vehicle.
(10) Remove the 3 bolts (Fig. 23) mounting the
HCU to the mounting bracket. Separate the HCU
from the mounting bracket.
(11) Remove the CAB (Fig. 19) from the bottom of
the HCU for installation on the replacement HCU.
Refer to Controller Antilock Brakes (CAB) in the
Removal And Installation Section in this group of the
service manual for the required procedure.
Fig. 19 CAB 25 Way Connector
Fig. 20 Unlocked 25 Way CAB Connector
Fig. 21 Brake Tube Connections To HCU
Fig. 22 HCU To Suspension Cradle Mounting Bolts
NSBRAKES 5 - 101
REMOVAL AND INSTALLATION (Continued)

INSTALL
(1) Install the CAB (Fig. 19) on the bottom of the
HCU. Refer to Controller Antilock Brakes (CAB) in
the Removal And Installation Section in this group of
the service manual for the required procedure.
(2) Install the HCU on the mounting bracket (Fig.
23). Install the 3 bolts (Fig. 23) attaching the HCU to
the mounting bracket. Tighten the 3 mounting bolts
to a torque of 11 N´m (97 in. lbs.).
CAUTION: The HCU mounting bracket to front sus-
pension cradle mounting bolts have a unique corro-
sion protection coating and a special aluminum
washer. For this reason, only the original, or origi-
nal equipment Mopar replacement bolts can be
used to mount the HCU bracket to the front suspen-
sion crossmember.
(3) Install the HCU and its mounting bracket as
an assembly on the front suspension crossmember.
Install the 3 bolts attaching the HCU bracket to the
crossmember (Fig. 22). Tighten the 3 mounting bolts
to a torque of 28 N´m (250 in. lbs.).
CAUTION: Because of the flexible section in the
primary and secondary brake tubes, and the brake
tubes between the HCU and the proportioning
valve, the brake tubes must be held in proper ori-
entation when tightened and torqued. These tubes
must not contact each other or other vehicle com-
ponents when installed. Also, after the brake tubes
are installed on the HCU, ensure all spacer clips are
reinstalled on the brake tubes.
CAUTION: When installing the chassis brake tubes
on the HCU valve block, they must be located cor-
rectly in the valve block to ensure proper ABS oper-
ation. Refer to (Fig. 21) for the correct chassis
brake tube locations.NOTE: The chassis brake tube attachment loca-
tions to the HCU, are marked on the bottom of the
HCU mounting bracket.
(4) Install the 6 chassis brake tubes into their cor-
rect port locations on the HCU valve block as shown
in (Fig. 21). Tighten the tube nuts to a torque of 17
N´m (145 in. lbs.).
NOTE: Before installing the 25 way connector in
the CAB be sure the seal is properly installed in the
connector.
(5) Install the 25 way connector (Fig. 19) on the
CAB using the following procedure. Position the 25
way connector in the socket of the CAB and carefully
push it down as far as possible. When connector is
fully seated by hand into the CAB socket, push in the
connector lock (Fig. 20). This will pull the connector
into the socket of the CAB and lock it in the installed
position.
NOTE: The CAB wiring harness must be clipped to
the HCU mounting bracket. This will ensure the wir-
ing harness is properly routed and does not contact
the brake tubes or the body of the vehicle.
(6) Clip the cab wiring harness (Fig. 19) to the
HCU mounting bracket.
(7) Install the routing clips (Fig. 24) on the brake
tubes.
(8) Lower vehicle.
(9) Connect negative cable back on negative post of
the battery.
(10) Bleed the base brakes and the ABS brakes
hydraulic system. Refer to the Bleeding ABS System
in this section of the manual for the proper bleeding
procedure.
(11) Road test vehicle to ensure proper operation of
the base and ABS systems.
Fig. 23 HCU Mounting Bolts
Fig. 24 Brake Tube Routing Clips
5 - 102 BRAKESNS
REMOVAL AND INSTALLATION (Continued)

CONTROLLER ANTILOCK BRAKES (CAB)
REMOVE
(1) Disconnect the negative (ground) cable from
the battery and isolate cable.
(2) Using a brake pedal depressor, move and lock
the brake pedal to a position past the first inch of
pedal travel.This will prevent brake fluid from
draining out of the master cylinder when the
brake tubes are removed from the HCU.
(3) Raise vehicle. Vehicle is to be raised and sup-
ported on jackstands or on a frame contact type
hoist. See Hoisting in the Lubrication And Mainte-
nance section of this service manual.
CAUTION: Do not apply a 12 volt power source to
any terminals of the 25 way HCU connector when
disconnected.
(4) Remove the 25 way connector (Fig. 25) from
the CAB located on the bottom of the HCU. The 25
way connector is removed from the CAB using the
following procedure. Grasp the lock on the 25 way
connector (Fig. 25) and pull it as far out as possible
(Fig. 26). This will unlock and raise the 25 way con-
nector from the socket on the CAB.
CAUTION: Before removing the brake tubes from
the HCU, the HCU must be thoroughly cleaned. This
must be done to prevent dirt particles from falling
into the ports of HCU or entering the brake tubes.
(5) Thoroughly clean all surfaces of the HCU, and
all brake tube nuts located on the HCU. Use only a
solvent such as Mopar Brake Parts Cleaner or an
equivalent to clean the HCU.
(6) Remove the brake tubes (6) from the inlet and
outlet ports on the HCU. (Fig. 27).(7) Remove the 3 bolts (Fig. 28) attaching the
HCU mounting bracket to the front suspension cross-
member.
Fig. 25 CAB 25 Way Connector
Fig. 26 Unlocking CAB 25 Way Connector
Fig. 27 Brake Tube Connections To HCU
Fig. 28 HCU To Suspension Cradle Mounting Bolts
NSBRAKES 5 - 103
REMOVAL AND INSTALLATION (Continued)

(8) Remove HCU and the mounting bracket as a
unit from the vehicle.
(9) Remove the 3 bolts (Fig. 29) mounting the
HCU to the mounting bracket. Separate the HCU
from the mounting bracket.
(10) Unplug the pump motor wiring harness (Fig.
30) from the CAB.
(11) Remove the 4 bolts (Fig. 31) attaching the
CAB to the valve block of the HCU.
(12) Remove the CAB from the valve block of the
HCU (Fig. 32).
INSTALL
(1) Install the CAB (Fig. 32) on the valve block of
the HCU.
(2) Install the 4 bolts mounting the CAB (Fig. 31)
to the valve block of the HCU. Tighten the CAB
mounting bolts to a torque of 2 N´m (17 in. lbs.).
(3) Plug the pump/motor wiring harness into the
CAB (Fig. 30).(4) Install the HCU on the mounting bracket (Fig.
29). Install the 3 bolts (Fig. 29) attaching the HCU to
the mounting bracket. Tighten the 3 mounting bolts
to a torque of 11 N´m (97 in. lbs.).
CAUTION: The HCU mounting bracket to front sus-
pension cradle mounting bolts have a unique corro-
sion protection coating and a special aluminum
washer. For this reason, only the original, or origi-
nal equipment Mopar replacement bolts can be
used to mount the HCU bracket to the front suspen-
sion crossmember.
(5) Install the HCU and its mounting bracket as
an assembly on the front suspension crossmember.
Install the 3 bolts attaching the HCU bracket to the
crossmember (Fig. 28). Tighten the 3 mounting bolts
to a torque of 28 N´m (250 in. lbs.).
Fig. 29 HCU Mounting Bolts
Fig. 30 Pump Motor To CAB Wiring Harness
Fig. 31 CAB Attaching Bolts
Fig. 32 Remove/Install CAB
5 - 104 BRAKESNS
REMOVAL AND INSTALLATION (Continued)