2003 CHRYSLER CARAVAN ECU

punch and tap edge of sensor ear, rocking the sensor
side-to-side until free.
(8) Remove front wheel speed sensor from vehicle.
INSTALLATION
CAUTION: Proper installation of wheel speed sen-
sor cables is critical to continued system operation.
Be sure that cables are installed in retainers. Fail-
ure to install cables in retainers as shown in this
section may result in contact with moving parts and
over extension of cables, resulting in an open cir-
cuit.
(1) Connect the front wheel speed sensor cable to
the vehicle wiring harness connector. Be sure speed
sensor cable connector is fully seated and locked into
vehicle wiring harness connector.
(2) Install the bolts attaching the routing clamps
to the body of the vehicle. Tighten the bolts to a
torque of 14 N´m (125 in. lbs.).
(3) Insert speed sensor cable grommets into inter-
mediate bracket on strut.
(4) Install the wheel speed sensor head mounting
bolt (Fig. 1). Tighten the bolt to a torque of 13 N´m
(115 in. lbs.)
(5) Install the wheel and tire assembly on vehicle.
(6) Lower vehicle.
(7) Road test vehicle to ensure proper operation of
the base and ABS brake systems.
REAR WHEEL SPEED SENSOR
-AWD
REMOVAL
(1) Raise vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE)
CAUTION: When disconnecting speed sensor cable
from vehicle wiring harness be careful not to dam-
age pins on the electrical connectors. Also, inspect
connectors for any signs of previous damage.
(2) Remove grommet from floor pan of vehicle and
disconnect speed sensor cable connector from vehicle
wiring harness.
CAUTION: When removing rear wheel speed sensor
cable from routing clips, be sure not to damage the
routing clips. Routing clips that are molded onto
the brake hose will require replacement of the brake
hose if damaged during removal or installation of
the speed sensor cable.
(3) Carefully remove speed sensor cable from
press-in routing clips along brake hose and tubing.(4) Remove bolt securing wheel speed sensor cable
metal clip to rear of axle. Remove metal clip from
cable if necessary.
CAUTION: If speed sensor head has seized due to
corrosion, do not use pliers on speed sensor head
in an attempt to remove it. Use a hammer and a
punch and tap mounting flange edge side-to-side,
rocking the sensor until free.
(5) Remove wheel speed sensor head attaching
bolt.
(6) Remove wheel speed sensor head from the axle,
and remove sensor from vehicle.
INSTALLATION
CAUTION: Proper installation of wheel speed sen-
sor cables is critical to continued system operation.
Be sure that cables are installed in retainers. Fail-
ure to install cables in retainers as indicated may
result in contact with moving parts or over-exten-
sion of cables, resulting in an open circuit.
(1) Install wheel speed sensor head in axle flange.
CAUTION: Prior to installing the speed sensor head
attaching bolt, the plastic anti-rotation pin must be
fully seated into the bearing flange.
(2) Install wheel speed sensor head attaching bolt.
Tighten bolt to a torque 10 N´m (90 in. lbs.).
(3) Check the air gap between the face of the
wheel speed sensor and the top surface of the tone
wheel. (Refer to 5 - BRAKES - SPECIFICATIONS)
CAUTION: When installing wheel speed sensor
cable in the routing clips on rear brake flex hose,
be sure not to damage the routing clips. Routing
clips are molded onto the hose and will require
replacement of the brake hose if damaged.
(4) Install speed sensor cable under leaf spring
onto brake hose and tubing utilizing routing clips to
secure it in place.
(5) Install metal routing clip on speed sensor cable
and mount it to rear of axle with mounting bolt.
Tighten mounting bolt to 16 N´m (140 in. lbs.).
(6) Connect wheel speed sensor cable to vehicle
wiring harness.Be sure speed sensor cable con-
nector is fully seated and locked into vehicle
wiring harness connector.
(7) Install speed sensor cable grommet into the
floor pan, being sure the grommet is fully seated into
the access hole.
(8) Lower vehicle.
(9) Road test vehicle to ensure proper operation of
the base and ABS braking systems.
5 - 80 BRAKES - ABSRS
FRONT WHEEL SPEED SENSOR (Continued)
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REAR WHEEL SPEED SENSOR
- FWD
REMOVAL
(1) Raise vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE)
CAUTION: When disconnecting speed sensor cable
from vehicle wiring harness be careful not to dam-
age pins on the electrical connectors. Also, inspect
connectors for any signs of previous damage.
(2) Remove grommet from floor pan of vehicle and
disconnect speed sensor cable connector from vehicle
wiring harness (Fig. 2).
CAUTION: When removing rear wheel speed sensor
cable from routing clips, be sure not to damage the
routing clips. Routing clips that are molded onto
the brake hose will require replacement of the brake
hose if damaged during removal or installation of
the speed sensor cable.
(3) Carefully remove speed sensor cable from
press-in routing clips (Fig. 3).
(4) Remove bolt securing metal routing clip to rear
of axle and remove sensor cable from metal clip (Fig.
3).
(5) Remove secondary (yellow) retaining clip at
rear of wheel speed sensor head (Fig. 4).
(6) Push up on metal retaining clip (Fig. 4) until it
bottoms. This will release wheel speed sensor head
from hub and bearing. While holding metal clip up,
pull back on wheel speed sensor head removing it
from hub and bearing.(7) Remove wheel speed sensor assembly from
vehicle.
INSTALLATION
CAUTION: Proper installation of wheel speed sen-
sor cable is critical to continued system operation.
Be sure that cable is installed in routing retainers/
clips. Failure to install cable in retainers may result
in contact with moving parts or over extension of
cable, resulting in an open circuit.
Fig. 2 Wheel Speed Sensor Connector
1 - CONNECTOR
2 - FLOOR PAN
3 - GROMMET
Fig. 3 SPEED SENSOR CABLE ROUTING
1 - METAL CLIP AND MOUNTING BOLT
2 - ROUTING CLIPS
Fig. 4 SENSOR CONNECTION AT HUB AND
BEARING
1 - SECONDARY SENSOR RETAINING CLIP
2 - METAL SENSOR RETAINING CLIP
3 - HUB AND BEARING
RSBRAKES - ABS5-81
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(Fig. 12). The ICU is located below the master cylin-
der in the engine compartment (Fig. 13).
Two different ICU's (HCU and CAB) are used on
this vehicle depending on whether or not the vehicle
is equipped with traction control. The HCU on a
vehicle equipped with traction control has a valve
block that is approximately one inch longer than a
HCU on a vehicle that is equipped with ABS only.
The ABS-only ICU consists of the following compo-
nents: the CAB, eight (build/decay) solenoid valves
(four inlet valves and four outlet valves), valve block,
fluid accumulators, a pump, and an electric motor.
The ABS-with traction control ICU consists of the
following components: the CAB, eight (build/decay)solenoid valves (four inlet valves and four outlet
valves), two traction control (ASR) valves, two
hydraulic shuttle valves, valve block, fluid accumula-
tors, a pump, and an electric motor.
The replaceable components of the ICU are the
HCU and the CAB. No attempt should be made to
service any individual components of the HCU or
CAB. For information on the CAB, (Refer to 8 -
ELECTRICAL/ELECTRONIC CONTROL MOD-
ULES/CONTROLLER ANTILOCK BRAKE -
DESCRIPTION).
OPERATION
For information of the ICU, refer to these individ-
ual components of the ICU:
²CONTROLLER ANTILOCK BRAKE (CAB)
(Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/CONTROLLER ANTILOCK
BRAKE - OPERATION)
²HYDRAULIC CONTROL UNIT (HCU) (Refer to
5 - BRAKES - ABS/HYDRAULIC/MECHANICAL/
HCU (HYDRAULIC CONTROL UNIT) - OPERA-
TION)
For information on the ICU's hydraulic circuits,
refer to HYDRAULIC CIRCUITS AND VALVE
OPERATION. (Refer to 5 - BRAKES - ABS/HY-
DRAULIC/MECHANICAL - OPERATION)
REMOVAL
REMOVAL - LHD
(1) Disconnect the negative (ground) cable from
the battery and isolate cable.
(2) Remove the battery shield.
(3) Remove the battery (Refer to 8 - ELECTRI-
CAL/BATTERY SYSTEM/BATTERY - REMOVAL).
(4) Disconnect the vacuum hose connector at the
tank built into the battery tray.
(5) Remove the screw securing the engine coolant
filler neck to the battery tray.
(6) Remove the battery tray (Refer to 8 - ELEC-
TRICAL/BATTERY SYSTEM/TRAY - REMOVAL).
(7) 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 once the
brake tubes are removed from the HCU.
CAUTION: Do not apply a 12±volt power source to
any terminals of the 24-way CAB connector when
disconnected.
(8) Disconnect the wiring harness connector from
the speed control servo.
(9) Remove the speed control servo mounting nuts
and move the servo out of the way.
Fig. 12 INTEGRATED CONTROL UNIT (ICU)
1 - PUMP/MOTOR
2 - HCU
3 - PUMP/MOTOR CONNECTOR
4 - CAB
Fig. 13 ICU LOCATION IN VEHICLE
1 - POWER BRAKE BOOSTER
2 - MASTER CYLINDER
3 - ICU
5 - 90 BRAKES - ABSRS
ICU (INTEGRATED CONTROL UNIT) (Continued)
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(10) Disconnect the 24±way connector from the
CAB. To disconnect the 24±way connector, grasp the
lock on the 24±way connector and pull it as far up as
possible. This will unlock the 24±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.
(11) Thoroughly clean all surfaces of the ICU and
brake tube nuts. Use only a solvent such as Mopart
Brake Parts Cleaner or equivalent to clean the ICU.
(12) Remove the brake tubes (4) from the outlet
ports on the HCU (Fig. 14).
(13) Remove the primary and secondary brake
tubes from the inlet ports on the HCU (Fig. 14).
(14) Center and prop the steering wheel.
(15) Remove the pinch bolt and disconnect the
steering shaft coupling.
(16) If equipped, remove the two clips securing
silencer to dash seal (Fig. 15). Remove silencer.
(17) Remove the three screws securing the dash
seal (Fig. 15). Remove seal.
(18) Remove the 3 bolts attaching the ICU to its
mounting bracket (Fig. 16).
(19) Remove ICU from the vehicle through engine
compartment.
(20) If required, to separating the CAB from the
HCU, (Refer to 5 - BRAKES - ABS/HYDRAULIC/ME-
CHANICAL/ICU (INTEGRATED CONTROL UNIT) -
DISASSEMBLY).
REMOVAL - RHD
NOTE: Before proceeding, (Refer to 5 - BRAKES -
WARNING)(Refer to 5 - BRAKES - CAUTION)
(1) Disconnect the negative (ground) cable from
the battery and isolate cable.
Fig. 14 Brake Tube Nuts At ICU
1 - PRIMARY BRAKE TUBE
2 - SECONDARY BRAKE TUBE
3 - CHASSIS BRAKE TUBES
Fig. 15 Lower Coupling And Dash Seal
1 - COUPLING
2 - DASH SEAL
3 - SILENCER
4 - MOUNTING SCREWS
5 - RETAINING CLIPS
6 - DASH
Fig. 16 ICU Mounting Bolts
1 - ICU MOUNTING BOLTS
2 - COUPLER
RSBRAKES - ABS5-91
ICU (INTEGRATED CONTROL UNIT) (Continued)
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ASSEMBLY - ICU
(1) Install the CAB (Fig. 24) on the HCU.
(2) Install the 4 bolts mounting the CAB (Fig. 23)
to 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.
(4) Install the ICU in the vehicle and bleed the
base and ABS hydraulic systems. (Refer to 5 -
BRAKES/HYDRAULIC/MECHANICAL/ICU (INTE-
GRATED CONTROL UNIT) - INSTALLATION)
INSTALLATION
INSTALLATION - LHD
(1) Place the ICU in its bracket below the master
cylinder. Start the upper mounting bolt to hold it in
place.
(2) Inside the vehicle, install the remaining 2
mounting bolts attaching the ICU to the mounting
bracket (Fig. 16). Tighten all 3 mounting bolts to a
torque of 11 N´m (97 in. lbs.).
(3) Install the dash seal and three mounting
screws (Fig. 15).
(4) If equipped, install the silencer on top of the
dash seal (Fig. 15).
(5) Connect the steering shaft coupling and install
the pinch bolt (Fig. 15). Tighten the pinch bolt to 28
N´m (250 in. lbs.).
(6) Remove the steering wheel holder.
CAUTION: Because of the flexible section in the pri-
mary and secondary brake tubes, the brake tubes
must be held in proper orientation when tightened
and torqued. These tubes must not contact eachother or other vehicle components when installed.
Also, after the brake tubes are installed on the HCU,
ensure all spacer clips are reinstalled on the brake
tubes.
(7) Install the primary and secondary brake tubes
into their correct port locations on the HCU valve
block (Fig. 14). Tighten the tube nuts to a torque of
17 N´m (145 in. lbs.).
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.
NOTE: The chassis brake tube attachment locations
to the HCU, are marked on the bottom of the CAB.
(8) Install the (4) chassis brake tubes into their
correct port locations on the HCU valve block as
shown (Fig. 14). Tighten the tube nuts to a torque of
17 N´m (145 in. lbs.).
NOTE: Before installing the 24±way connector in
the CAB be sure the seal is properly installed in the
connector.
(9) Install the 24±way connector on the CAB by,
first, positioning the 24±way connector in the socket
of the CAB and carefully pushing it down as far as
possible. Once connector is fully seated by hand into
the CAB socket, push down on connector lock. This
will pull the connector into the socket of the CAB
and lock it in the installed position.
(10) Install any routing clips on the brake tubes.
(11) Remove the brake pedal holder.
(12) Install the speed control servo with its mount-
ing nuts.
(13) Connect the wiring harness to the speed con-
trol servo.
(14) Install the battery tray (Refer to 8 - ELEC-
TRICAL/BATTERY SYSTEM/TRAY - INSTALLA-
TION).
(15) Install the screw securing the coolant filler
neck to the battery tray.
(16) Reconnect the vacuum hose connector at the
tank built into the battery tray.
(17) Install the battery (Refer to 8 - ELECTRI-
CAL/BATTERY SYSTEM/BATTERY - INSTALLA-
TION).
(18) Install the battery shield.
(19) Remove the brake pedal holder.
(20) Connect negative cable back on negative post
of the battery.
(21) Bleed the Base and ABS brake hydraulic sys-
tems (Refer to 5 - BRAKES - STANDARD PROCE-
DURE).
Fig. 24 (TYPICAL) Remove/Install CAB
1 - CAB
2 - HCU VALVES
3 - HCU VALVE BLOCK
5 - 94 BRAKES - ABSRS
ICU (INTEGRATED CONTROL UNIT) (Continued)
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INSTALLATION
(1) Carefully route master cylinder plumbing into
engine compartment as removed and position master
cylinder to dash panel hole.
(2) Rotate master cylinder 45É clockwise, insert
into dash panel hole, engaging clutch pedal bracket.
Rotate master cylinder 45É counter-clockwise, secur-
ing it to pedal bracket (Fig. 13).
(3) Install and secure grommet to dash panel.
(4) Connect pushrod to clutch pedal pin. Install
retainer clip (Fig. 13).
(5) Secure master cylinder plumbing to retainers
in engine compartment.
(6) Connect clutch master cylinder plumbing to
slave cylinder ªquick connectº fitting. An audible
ªclickº should be heard. Verify connection by pulling
outward.
(7) Connect A/C suction/discharge line to evapora-
tor junction block.
(8)Diesel models:Install wiper module assembly.
(Refer to 8 - ELECTRICAL/WIPERS/WASHERS/
WIPER MODULE - INSTALLATION)
(9) Install battery and tray.
(10) Connect battery negative cable
(11) Charge Air Conditioning system. (Refer to 24 -
HEATING & AIR CONDITIONING/PLUMBING/RE-
FRIGERANT - STANDARD PROCEDURE)
MASTER CYLINDER - LHD
REMOVAL
(1) Disconnect battery cables.
(2) Remove instrument panel lower silencer (Fig.
14).
(3) Remove knee bolster (Fig. 15).
(4) Remove clutch master cylinder pushrod
retainer clip (Fig. 16).
(5) Disconnect pushrod from clutch pedal (Fig. 16).
(6) Remove battery shield.
(7) Remove battery.
(8) Remove battery tray.
(9) Remove windshield wiper module assembly
(Refer to 8 - ELECTRICAL/WIPERS/WASHERS/
WIPER MODULE - REMOVAL).
Fig. 13 Clutch Master Cylinder at Pedal Bracket
1 - CLUTCH MASTER CYLINDER
2 - RETAINER CLIP
3 - CLUTCH PEDAL PIN
4 - PUSH RODFig. 14 Instrument Panel Lower Silencer
1 - INSTRUMENT PANEL LOWER SILENCER
Fig. 15 Knee Bolster
1 - KNEE BOLSTER
RSCLUTCH6-9
MASTER CYLINDER - RHD (Continued)
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(10) Using Tool 6638A, disconnect clutch master
cylinder ªquick connectº fitting (Fig. 17). Disengage
plumbing retainer from body stud.
(11) Remove master cylinder reservoir-to-strut
tower nuts (Fig. 18). Reposition reservoir off to side.
(12) Remove clutch master cylinder from dash
panel by rotating clockwise 45É and removing from
dash panel (Fig. 18).(13) Remove master cylinder and plumbing from
engine compartment. Use care not to bend or kink
plumbing. Note plumbing routing to aid in installa-
tion.
INSTALLATION
(1) Install master cylinder into position, while
routing plumbing as originally installed.
(2) Insert master cylinder pushrod through dash
panel (Fig. 18) and rotate 45É counter-clockwise to
secure.
(3) Connect master cylinder plumbing quick-con-
nect fitting. An audible ªclickº should be heard. Ver-
ify connection by pulling outward.
(4) Install master cylinder reservoir onto strut
tower. Install and tighten two (2) master cylinder
reservoir-to-strut tower nuts to 11 N´m (100 in. lbs.)
(Fig. 18).
(5) Install windshield wiper module assembly
(Refer to 8 - ELECTRICAL/WIPERS/WASHERS/
WIPER MODULE - INSTALLATION).
(6) Install battery tray.
(7) Install battery.
(8) Install battery shield.
(9) Connect master cylinder pushrod to clutch
pedal lever (Fig. 16). Install retainer clip.
(10) Install knee bolster and instrument panel
lower silencer (Fig. 15) (Fig. 14).
(11) Connect battery cables.
Fig. 16 Master Cylinder Pushrod at Pedal
1 - MASTER CYLINDER PUSHROD
2 - CLUTCH/BRAKE PEDAL ASSEMBLY
3 - PUSHROD RETAINER
Fig. 17 Disconnect Quick-Connect Using Tool 6638A
1 - QUICK CONNECT FITTING
2 - TOOL 6638A
Fig. 18 Clutch Master Cylinder Removal/Installation
1 - CLUTCH MASTER CYLINDER
2 - RESERVOIR
3 - NUT (2)
6 - 10 CLUTCHRS
MASTER CYLINDER - LHD (Continued)
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INSTALLATION
LHD
(1) Install interlock switch into pedal bracket hole,
and secure harness with retainer as shown in (Fig.
28). Make sure switch wing tabs are fully expanded.
(2) Connect interlock switch connector.
(3) Install knee bolster (Fig. 24).
(4) Install instrument panel lower silencer (Fig.
23).
(5) Connect battery negative cable.
(6) Verify function of starter interlock switch.
Switch must actuate when pedal is depressed.
RHD
(1) Install interlock switch to pedal bracket assem-
bly as shown in (Fig. 28). Secure connector with
retainer to hole in bracket.
(2) Install clutch pedal bracket assembly into posi-
tion. Install pedal bracket mounting nuts and torque
to 28 N´m (250 in. lbs.).
(3) Connect interlock and upstop switch connec-
tors.
(4) Install clutch master cylinder into position and
rotate 45É counter-clockwise to secure to pedal
bracket (Fig. 26). Secure dash panel grommet and
secure hydraulic pluming into dash panel retainers.
(5) Connect master cylinder pushrod to clutch
pedal pin and secure with retainer clip (Fig. 26).
(6) Install knee bolster (Fig. 24).
Fig. 26 Clutch Master Cylinder at Pedal Bracket
1 - CLUTCH MASTER CYLINDER
2 - RETAINER CLIP
3 - CLUTCH PEDAL PIN
4 - PUSH ROD
Fig. 27 Clutch Pedal/Bracket Assembly
1 - CLUTCH PEDAL/BRACKET ASSY.
2 - NUT (4)
Fig. 28 Clutch Pedal Interlock Switch
1 - CLUTCH INTERLOCK SWITCH
2 - CLUTCH PEDAL/BRACKET ASSY.
6 - 14 CLUTCHRS
CLUTCH PEDAL INTERLOCK SWITCH (Continued)
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