brake MERCEDES-BENZ SPRINTER 2006 Service Manual

INSTALLATION - REAR
NOTE: Route the park brake cable free of tension
and the risk of chafing.
(1) Install the hand brake cable to the anchor
plate (Fig. 31).
(2) Install the park brake cable lock (Fig. 31).
(3) Install all connections on the hardware cable
(Fig. 31).
(4) Install the park brake cables to the shoe (Fig.
31).
(5) Install the park brake shoes.
(6) Install the rear wheels.
(7) Adjust the park brakes.
(8) Lower the vehicle.
ADJUSTMENTS
ADJUSTMENT - PARKING BRAKE CABLES
(1) Loosen the bolts of the mounting brackets (Fig.
33).
(2) Insert a drill bit or an allen wrench with a 6
mm diameter between the mounting bracket and
front lever (Fig. 33).
(3) Push the mounting bracket back until the front
brake cable is free of play and without tension (Fig.
33).
(4) Tighten the bolts to the mounting bracket
Tighten to 25 N´m (221 in. lbs.) (Fig. 33).
(5) Remove the 6 mm diameter drill bit or allen
wrench (Fig. 33).
(6) Tighten the hand brake lever one notch (Fig.
33).(7) Clamp the eccentric clockwise until the wheels/
disc brake rotors can still be turned with the force of
the hand (Fig. 34).
(8) Tighten the clamp bolt (Fig. 34).
(9) Release the hand brake lever.
(10) Check the wheel for free movement.
LEVER
REMOVAL
(1) Disconnect the front brake cable from the pul-
ley unit.
(2) Remove the front brake cable from the hand
brake lever (Fig. 29).
(3) Remove the circle cover (Fig. 35).
Fig. 32 FRONT PARK BRAKE CABLE
1 - RETAINING CLIP
2 - LOCKING PIN
3 - FRONT PARK BRAKE CABLE
4 - RETAINING CLIP
5 - PARK BRAKE CABLE ADJUSTER
Fig. 33 PARK BRAKE ADJUSTER
1 - LOOSEN MOUNTING BOLTS
2-6mmALLEN WRENCH
3 - MOUNTING BOLTS TIGHTENED
4 - FREEPLAY WITH NO TENSION
Fig. 34 PARK BRAKE ADJUSTMENT
1 - ECCENTRIC CLOCKWISE
2 - CLAMP SCREW TIGHTENED
5 - 26 BRAKES - BASEVA

(4) Remove the bolts on the hand brake lever (Fig.
35).
(5) Pull the cover off the hand brake lever (Fig.
35).
(6) Disconnect the hand brake check switch and
wiring harness from the hand brake lever (Fig. 35).
(7) Remove the hand brake lever (Fig. 35).
INSTALLATION
(1) Install the hand brake lever (Fig. 35).
(2) Reconnect the hand brake check switch and the
wiring harness to the hand brake lever (Fig. 35).
(3) Install the cover to the hand brake lever (Fig.
35).
(4) Install the bolts on the hand brake lever.
Tighten to 25 N´m (221 in. lbs.) (Fig. 35).
(5) Install the circle cover (Fig. 35).
(6) Install the front brake cable to the hand brake
lever.
(7) Connect the front brake cable to the pulley unit
(Fig. 35).
SHOES
REMOVAL
REMOVAL - (SRW)
(1) Raise and support the vehicle.
(2) Remove the rear wheels.
(3) Remove the disc brake rotor.(4) Disconnect the front park brake cable from the
pulley unit.Do not remove the rear park brake
cables.
(5) Remove the retracting springs using special
tool 9280 (Fig. 36).
(6) Remove the adjuster (Fig. 36).
(7) Remove the pressure springs using special tool
9281 (Fig. 36).
(8) Remove the rear park brake shoes (Fig. 36).
Pull the park brake shoes apart at the bottom
and remove them together with the adjuster.
REMOVAL - (DRW)
(1) Raise and support the vehicle.
(2) Remove the rear wheels.
(3) Remove the wheel flange ring.
(4) Remove the disc brake rotor.
(5) Disconnect the front park brake cable from the
pulley unit.Do not remove the rear park brake
cables.
(6) Remove the retracting springs (Fig. 37).
(7) Remove the adjuster (Fig. 37).
(8) Remove the pressure springs (Fig. 37). by
depressing with your fingers and twisting.
(9) Remove the rear park brake shoes (Fig. 37).
Pull the park brake shoes apart at the bottom
and remove them together with the adjuster.
Fig. 35 HAND BRAKE LEVER
1 - LOCKING PIN
2 - COVER
3 - HAND BRAKE LEVER
4 - HAND BRAKE CHECK SWITCH
5 - WIRING HARNESS
6 - BOLT
7 - HAND BRAKE CABLE
8 - BOLT
9 - RETAINING CLIP
10 - CIRCLE COVER
Fig. 36 PARK BRAKE SHOES
1 - PARK BRAKE SHOES
2 - PRESSURE SPRING
3 - RETRACTING SPRING (SHORT HOOK EYE)
4 - RETRACTING SPRING (LONG HOOK EYE)
5 - CABLE LOCK
6 - ADJUSTER
VABRAKES - BASE 5 - 27

CLEANING - REAR DRUM IN HAT BRAKE
Clean the individual brake components, including
the support plate exterior, with a water dampened
cloth or with brake cleaner. Do not use any other
cleaning agents. Remove light rust and scale from
the brake shoe contact pads on the support plate
with fine sandpaper.
INSTALLATION
INSTALLATION - (SRW)
NOTE: Preassemble the retracting spring with the
short hook eye from the inside together with the
adjuster wheel at the bottom. Fit the preassembled
park brake shoes on the brake carrier.
(1)Ensure that the cable lock moves easily
before installing shoes.Install the park brake
shoes.
(2) Install the lower retracting spring using special
tool 9280.
(3) Install the hold down springs using special tool
9281.
(4) Install the upper retracting spring using spe-
cial tool 9280.
(5) Install the adjuster.
(6) Install the front park brake cable to the pulley
unit.
(7) Install the disc brake rotor.
(8) Install the rear wheels.
(9) Adjust the parking brakes.(10) Lower the vehicle.
(11) Pump the brake pedal several times to check
the operation of the brakes before moving vehicle.
INSTALLATION - (DRW)
NOTE: Preassemble the retracting spring with the
short hook eye from the inside together with the
adjuster wheel at the bottom. Fit the preassembled
park brake shoes on the brake carrier.
(1)Ensure that the cable lock moves easily
before installing shoes.Install the park brake
shoes.
(2) Install the lower retracting spring.
(3) Install the pressure hold down springs by
depressing with your fingers and twisting to lock in
place.
(4) Install the upper retracting spring.
(5) Install the adjuster.
(6) Install the front park brake cable to the pulley
unit.
(7) Install the disc brake rotor.
(8) Install the rear wheel flange ring. Tighten to
200 N´m (148 ft. lbs.).
(9) Install the rear wheels.
(10) Adjust the parking brakes.
(11) Lower the vehicle.
(12) Pump the brake pedal several times to check
the operation of the brakes before moving vehicle.
ADJUSTMENTS
ADJUSTMENT
(1) Raise and support the vehicle.
(2) Remove the rear wheels.
(3) Turn the adjusting wheel through the hole of
the wheel lug bolt until it is no longer possible to
rotate the rear wheel (Fig. 38).
(4) Loosen the adjusting wheel 3-4 teeth divisions
(Fig. 38).
Fig. 37 PARK BRAKE SHOES WITH DUAL REAR
WHEELS
1 - HOLD DOWN PIN
2 - PRESSURE SPRING
3 - ADJUSTER
4 - UPPER RETRACTING SPRING
5 - LOWER RETRACTING SPRING
6 - CABLE LOCK
7 - LOCKING PIN
8 - BRAKE CABLE
9 - PARK BRAKE SHOE
5 - 28 BRAKES - BASEVA

(5) Inspect the clearance, or a slight drag when
rotating the wheel/rear disc brake rotor (Fig. 39).
(6) Install rear wheels.
(7) Lower the vehicle and test the park brake sys-
tem to hold the vehicle.
Fig. 38 STAR WHEEL ADJUSTER
1 - LEFT HAND PARK BRAKE SHOES APPLIED
2 - RIGHT HAND PARK BRAKE SHOES RELEASED
3 - FLAT BLADED TOOL
Fig. 39 ADJUSTING REAR PARK BRAKE SHOES
1 - FRONT BRAKE CABLE
2 - SHOE ADJUSTER
3 - REAR BRAKE CABLES
4 - PARK BRAKE CABLE ADJUSTER
VABRAKES - BASE 5 - 29

BRAKES - ABS
TABLE OF CONTENTS
page page
BRAKES - ABS
SPECIFICATIONS - TORQUE CHART........30
ELECTRICAL
DESCRIPTION.........................30
OPERATION...........................30
FRONT WHEEL SPEED SENSOR
REMOVAL.............................31
INSTALLATION.........................31
REAR WHEEL SPEED SENSOR
REMOVAL.............................31
INSTALLATION.........................32
TONE WHEEL
REMOVAL.............................32
INSTALLATION.........................32
STEERING ANGLE SENSOR
DESCRIPTION.........................32REMOVAL.............................33
INSTALLATION.........................33
LATERAL ACCELERATION SENSOR
DESCRIPTION.........................33
REMOVAL.............................33
INSTALLATION.........................34
YAW RATE SENSOR
DESCRIPTION.........................35
REMOVAL.............................35
INSTALLATION.........................36
HCU (HYDRAULIC CONTROL UNIT)
DESCRIPTION.........................36
REMOVAL.............................36
INSTALLATION.........................37
BRAKES - ABS
SPECIFICATIONS - TORQUE CHART
TORQUE SPECIFICATIONS
DESCRIPTION N´m Ft. Lbs. In. Lbs.
Brake Lines To Hydraulic
unit16 Ð 12
ELECTRICAL
DESCRIPTION
NOTE: Wheel speed sensor should be installed all
the way into the clamping bushings, the wheel
speed sensor will self adjust when the vehicle is
moved.
The ABS brake system uses 4 wheel speed sensors.
A sensor is mounted to each front hub/bearings in
the front. A rear sensor is mounted to each rear sup-
port plate.
OPERATION
The Wheel Speed Sensor consists of a magnet sur-
rounded by windings from a single strand of wire.
The sensor sends a small AC signal to the CAB. This
signal is generated by magnetic induction. The mag-netic induction is created when a toothed sensor ring
(exciter ring or tone wheel) passes the stationary
magnetic WSS.
When the ring gear is rotated, the exciter ring
passes the tip of the WSS. As the exciter ring tooth
approaches the tip of the WSS, the magnetic lines of
force expand, causing the magnetic field to cut across
the sensor's windings. This, in turn causes current to
flow through the WSS circuit (Fig. 1) in one direc-
tion. When the exciter ring tooth moves away from
the sensor tip, the magnetic lines of force collapse
cutting the winding in the opposite direction. This
causes the current to flow in the opposite direction.
Every time a tooth of the exciter ring passes the tip
of the WSS, an AC signal is generated. Each AC sig-
nal (positive to negative signal or sinewave) is inter-
preted by the CAB. It then compares the frequency of
the sinewave to a time value to calculate vehicle
speed. The CAB continues to monitor the frequency
5 - 30 BRAKES - ABSVA

to determine a deceleration rate that would indicate
a possible wheel-locking tendency.
The signal strength of any magnetic induction sen-
sor is directly affected by:
²Magnetic field strength; the stronger the mag-
netic field, the stronger the signal
²Number of windings in the sensor; more wind-
ings provide a stronger signal
²Exciter ring speed; the faster the exciter ring/
tone wheel rotates, the stronger the signal will be
²Distance between the exciter ring teeth and
WSS; the closer the WSS is to the exciter ring/tone
wheel, the stronger the signal will be.
FRONT WHEEL SPEED SEN-
SOR
REMOVAL
(1) Raise and support the vehicle.
(2) Remove the front wheels.
(3) Pull the wheel speed sensor out of the front
wheel hub (Fig. 2).
(4)Only do this step if sensor replacement is
necessary.Cut through the wheel speed sensor
cable at an easily accessible point (Fig. 2).
(5) Remove clamping sleeve from the knuckle if
damaged or being replaced with new sensor (Fig.
2).
INSTALLATION
(1) Connect separate wheel speed sensor cables
with shrink-fit sleeves and shrink-fit tubing (Fig. 2).
Only do this step if replacing the sensor.
(2) Install the clamping bushing into the knuckle
(Fig. 2)Only do this step if replacing the sensor
or the clamping bushing was damaged.
(3) Install the wheel speed sensor all the way into
the front wheel hub the wheel speed sensor will self
adjust when the vehicle is moved (Fig. 2).
(4) Install the front wheels.
(5) Lower the vehicle.
REAR WHEEL SPEED SENSOR
REMOVAL
(1) Raise and support the vehicle.
(2) Remove the rear wheels.
(3) Pull the wheel speed sensor out of the mount-
ing hole in the axle supporting tube (Fig. 3).
(4)Only do this step if sensor replacement is
necessary.Cut through the wheel speed sensor
cable at an easily accessible point (Fig. 3).
(5) Remove clamping sleeve from the knuckle if
damaged or being replaced with new sensor (Fig.
3).
Fig. 1 Operation of the Wheel Speed Sensor
1 - MAGNETIC CORE
2 - CAB
3 - AIR GAP
4 - EXCITER RING
5 - COIL
Fig. 2 FRONT WHEEL SPEED SENSOR
1 - SHRINK-FIT SLEEVE
2 - CLAMPING BUSHING
3 - SPEED SENSOR
4 - SHRINK TUBE
VABRAKES - ABS 5 - 31

INSTALLATION
(1) Connect separate wheel speed sensor cables
with shrink-fit sleeves and shrink-fit tubing (Fig. 3).
Only do this step if replacing the sensor.
(2) Install the clamping bushing into the knuckle
(Fig. 3)Only do this step if replacing the sensor
or the clamping bushing was damaged.
(3) Install the wheel speed sensor all the way into
the axle tube, the wheel speed sensor will self adjust
when the vehicle is moved (Fig. 3).
(4) Install the rear wheels.
(5) Lower the vehicle.
TONE WHEEL
REMOVAL
(1) Remove the hub/bearing assembly (DRW)
(Refer to 3 - DIFFERENTIAL & DRIVELINE/REAR
AXLE/AXLE BEARINGS - REMOVAL).
(2) Insert a hooked prybar between the hub/bear-
ing and the inside of the tone wheel and pry upwards
slightly and work your way around the tone wheel
until the wheel is loose (Fig. 4).
(3) Remove the tone wheel.
INSTALLATION
(1) Install the tone wheel to the hub/bearing with
a thin bead of silicone around the tone wheel.
(2) Tap the tone wheel down with a soft hammer
until seated.
(3) Install the hub/bearing (DRW) (Refer to 3 -
DIFFERENTIAL & DRIVELINE/REAR AXLE/AXLE
BEARINGS - INSTALLATION).
STEERING ANGLE SENSOR
DESCRIPTION
Fig. 3 REAR WHEEL SPEED SENSORS
1 - SHRINK-FIT SLEEVE
2 - SPEED SENSOR
3 - CLAMPING BUSHING
4 - SHRINK TUBE
Fig. 4 TONE WHEEL REMOVAL
1 - HOOKED PRYBAR
2 - TONE WHEEL
3 - HUB/BEARING ASSEMBLY
Fig. 5 STEERING ANGLE SENSOR
1 - UPPER STEERING COLUMN COVER
2 - CLOCKSPRING
3 - STEERING ANGLE SENSOR
4 - LOWER STEERING COLUMN COVER
5 - FRONT COVER
6 - STEERING ANGLE SENSOR ELECTRICAL CONNECTION
5 - 32 BRAKES - ABSVA

The Steering Angle Sensor is used to measure rate/
speed and direction of the steering wheel. This sen-
sor has 4 wires 12V, ground and 2 CAN Bus circuits.
This sensor is wired directly to the CAN Bus. This
sensor has to be programmed using the DRB IIIt
(Fig. 5).
REMOVAL
(1) Disconnect the battery.
(2) Remove the airbag (Refer to 8 - ELECTRICAL/
RESTRAINTS/AIRBAG CONTROL MODULE -
REMOVAL).
(3) Remove the steering wheel (Refer to 19 -
STEERING/COLUMN/STEERING WHEEL -
REMOVAL).
(4) Remove the front cover (Fig. 6).
(5) Remove the upper and lower steering column
covers (Fig. 6).
(6) Remove the clockspring (Refer to 8 - ELECTRI-
CAL/RESTRAINTS/CLOCKSPRING - REMOVAL)
(Fig. 6).
(7) Disconnect the electrical connector from the
steering angle sensor (Fig. 6).
(8) Remove the steering angle sensor (Fig. 6).
INSTALLATION
NOTE: The installation position of the steering
angle sensor must have the plug connection at the
bottom (Fig. 6).
(1) Install the steering angle sensor to the column
(Fig. 6).(2) Reconnect the electrical connector to the steer-
ing angle sensor (Fig. 6).
(3) Install the clockspring (Refer to 8 - ELECTRI-
CAL/RESTRAINTS/CLOCKSPRING - INSTALLA-
TION) (Fig. 6).
(4) Install the upper and lower steering column
covers (Fig. 6).
(5) Install the front cover (Fig. 6).
(6) Install the steering wheel (Refer to 19 -
STEERING/COLUMN/STEERING WHEEL -
INSTALLATION).
(7) Install the airbag (Refer to 8 - ELECTRICAL/
RESTRAINTS/AIRBAG CONTROL MODULE -
INSTALLATION).
(8) Reconnect the battery.
(9) Recalibrate the steering angle sensor using the
scan tool.
LATERAL ACCELERATION
SENSOR
DESCRIPTION
The Yaw Rate and Lateral Acceleration Sensor is
housed into one unit (Fig. 7)(each individual sen-
sor can not be replaced separately the whole
housing unit must be replaced when servicing).
The sensor is used to measure side to side (Lateral)
motion and vehicle rotational sensing (how fast the
vehicle is turning). This is a 6±wire sensor with all
six wires connected to the ESP/ABS module.
REMOVAL
(1) Disconnect the battery.
(2) Move the drivers seat forward and upwards.
Fig. 6 STEERING ANGLE SENSOR
1 - UPPER STEERING COLUMN COVER
2 - CLOCKSPRING
3 - STEERING ANGLE SENSOR
4 - LOWER STEERING COLUMN COVER
5 - FRONT COVER
6 - STEERING ANGLE SENSOR ELECTRICAL CONNECTION
Fig. 7 YAW/LATERAL ACCELERATION SENSOR
1 - SEAT BOX
2 - YAW RATE/ LATERAL ACCELERATION SENSOR
VABRAKES - ABS 5 - 33

(3) Remove the cover below the drivers seat (Fig.
8).
(4) Remove the bracket for the control modules
and set aside with the control modules (Fig. 9).
(5) Remove the screws securing the Yaw rate/lat-
eral Acceleration Sensor (Fig. 10).(6) Remove the metal cover over the sensor.
(7) Disconnect the electrical connector (Fig. 11).
(8) Remove the Yaw rate/lateral Acceleration Sen-
sor.
INSTALLATION
(1) Reconnect the yaw rate/lateral acceleration
sensor electrical connector (Fig. 11).
(2) Install the yaw rate/lateral acceleration sensor.
(3) Install the metal cover over top of the sensor.
(4) Install the screws securing the yaw rate/lateral
acceleration sensor (Fig. 10). Tighten to 6 N´m (53
in.lbs).
Fig. 8 COVER
1 - SCREWS
2 - COVER
Fig. 9 CONTROL MODULE BRACKET
1 - SEAT FRAME
2 - BRACKET FOR THE CONTROL MODULES
Fig. 10 SENSOR REMOVE/INSTALL
1 - SCREWS
2 - YAW RATE/LATERAL ACCELERATION SENSOR
Fig. 11 ELECTRICAL CONNECTOR
1 - YAW RATE/ATERAL ACCELERATION SENSOR
2 - ELECTRICAL CONNECTOR
5 - 34 BRAKES - ABSVA

(5) Install the bracket with the control modules
(Fig. 9).
(6) Install the cover for the drivers seat (Fig. 8).
(7) Return the drivers seat to normal position.
(8) Reconnect the battery.
(9) Perform diagnosis quick check and road test
the vehicle.
YAW RATE SENSOR
DESCRIPTION
The Yaw Rate and Lateral Acceleration Sensor is
housed into one unit (Fig. 12)(each individual sen-
sor can not be replaced separately the whole
housing unit must be replaced when servicing).
The sensor is used to measure side to side (Lateral)
motion and vehicle rotational sensing (how fast the
vehicle is turning). This is a 6±wire sensor with all
six wires connected to the ESP/ABS module.
REMOVAL
(1) Disconnect the battery.
(2) Move the drivers seat forward and upwards.(3) Remove the cover below the drivers seat (Fig.
13).
(4) Remove the bracket for the control modules
and set aside with the control modules (Fig. 14).
(5) Remove the screws securing the Yaw rate/lat-
eral Acceleration Sensor (Fig. 15).
Fig. 12 YAW/LATERAL ACCELERATION SENSOR
1 - SEAT BOX
2 - YAW RATE/ LATERAL ACCELERATION SENSOR
Fig. 13 COVER
1 - SCREWS
2 - COVER
Fig. 14 CONTROL MODULE BRACKET
1 - SEAT FRAME
2 - BRACKET FOR THE CONTROL MODULES
VABRAKES - ABS 5 - 35