2006 MERCEDES-BENZ SPRINTER sensor

INSTALLATION - SINGLE REAR WHEEL
(1) Install sealing ring.
(2) Install axle shaft (1) in the axle tube (2) (Fig.
7).
(3) Installnewbearing cap (2) bolts (1) and
tighten to 72 N´m (53 ft. lbs.) (Fig. 8).
NOTE: Tighten bolts diagonally across.
(4) Install brake control cable lock.
(5) Install parking brake shoes.
(6) Install brake disk and calipers.
(7) Coat clamping bush with acid-free grease.
Insert ABS sensor with clamping bush fully into the
mounting hole.
(8) Install front brake cable.(9) Operate brake pedal several times until brake
pads contact brake discs (brake pressure built up).
(10) Install wheels.
BEARING / SEAL - AXLE
REMOVAL
(1) Remove rear axle shaft.
(2) With a punch (2) and hammer straighten bear-
ing (4) nut (1) locking ring (3) (Fig. 9).
(3) Install two wheel mounting bolts into the axle
shaft (1) and clamp in vise. Loosen bearing (4) nut
(2) with Wrench 9279 (3) (Fig. 10).
Fig. 7 AXLE SHAFT AND TUBE
1 - AXLE SHAFT
2 - AXLE TUBE
3 - AXLE BEARINGS
4 - DUST SHIELD
Fig. 8 BEARING CAP BOLTS
1 - BEARING CAP BOLTS
2 - BEARING CAP
3 - AXLE SHAFT FLANGE
Fig. 9 LOCKING RING
1 - BEARING NUT
2 - PUNCH
3 - LOCKING RING
4 - BEARING
Fig. 10 BEARING NUT WRENCH
1 - AXLE SHAFT
2 - BEARING NUT
3 - WRENCH
4 - BEARING
3 - 24 REAR AXLEVA

(7) Pry out ABS sensor ring (1) and seal (2) from
hub (Fig. 23).
(8) Remove hub bearings (1) (3) from hub (2) (Fig.
24).
(9) Remove inner and outer bearing cups from hub
with a hammer and drift.
INSTALLATION
(1) Install hub bearing cups with Installer 9291
and a hammer.
(2) Clean and thoroughly grease bearings with
Multi-purpose grease.
(3) Install inner wheel bearing.
(4) Coat outer circumference ofnewseal (2) with
Hylomar SQ 32 M sealant.
CAUTION: Do not coat seals rubberized sealing sur-
faces with sealant.
(5) Install seal (2) into hub with an appropriate
installer.
NOTE: Seal ring should be flush with wheel hub or
max. 3mm (0.12 in.) deep.
(6) Coat contact surface of ABS sensor ring (1)
with Hylomar SQ 32 M sealant (Fig. 25).
(7) Drive ABS sensor ring (1) in as far as the stop
with a plastic hammer (Fig. 25).
(8) Install hub on axle tube.
Fig. 23 SENSOR RING & OIL SEAL
1 - ABS SENSOR RING
2 - SEAL
Fig. 24 AXLE HUB BEARINGS
1 - REAR BEARING
2 - HUB
3 - FRONT BEARING
4 - ROTOR
Fig. 25 SENSOR RING & OIL SEAL
1 - ABS SENSOR RING
2 - SEAL
VAREAR AXLE 3 - 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