Front Wheel Speed Sensor; Rear Wheel Speed Sensor; Operation Of The Wheel Speed Sensor; Rear Wheel Speed Sensors - Mercedes-Benz 2005 Sprinter Service Manual

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BRAKES - ABS

ELECTRICAL (Continued)
Fig. 1 Operation of the Wheel Speed Sensor
1 - MAGNETIC CORE
2 - CAB
3 - AIR GAP
4 - EXCITER RING
5 - COIL
• Number of windings in the sensor; more wind-
ings provide a stronger signal
• Exciter ring speed; the faster the exciter ring/
tone wheel rotates, the stronger the signal will be
• Distance 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
SENSOR

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 due this step if sensor replacement is
necessary. Cut through the wheel speed sensor
cable at an easily accessible point (Fig. 2)

INSTALLATION

(1) Connect separate wheel speed sensor cables
with shrink-fit sleeves and shrink-fit tubing (Fig.
2).Only due this step if replacing the sensor.
(2) 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).
(3) Install the front wheels.
Fig. 2 FRONT WHEEL SPEED SENSOR
1 - SHRINK-FIT SLEEVE
2 - CLAMPING BUSHING
3 - SPEED SENSOR
4 - SHRINK TUBE
(4) 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 due this step if sensor replacement is
necessary. Cut through the wheel speed sensor
cable at an easily accessible point (Fig. 3)
Fig. 3 REAR WHEEL SPEED SENSORS
1 - SHRINK-FIT SLEEVE
2 - SPEED SENSOR
3 - CLAMPING BUSHING
4 - SHRINK TUBE
VA