Wheel Speed Sensors - Ford 2007 WQ Fiesta Repair Manual

206-09A-6 Anti-Lock Control 206-09A-6
DESCRIPTION AND OPERATION
Wheel speed sensors
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The wheel speed sensors are active sensors. They
are supplied with a voltage from the ABS control
unit after the ignition is switched on.
Item Description
The ABS control unit can be diagnosed via the
The pulses are picked up from a mechanically
encoded ring, which is built into the wheel bearings
on the front wheels while for the rear wheels it is
a metal ring which is mounted on the stub axle.
The registered wheel speed is converted into a
digital (square-wave) signal by the electronics
integrated in the sensor and is then transmitted to
the ABS control unit.
Data Link Connector (DLC).
The hydraulic unit is pre-filled for service.
1
2
Data transmissions to the ABS control unit take
place via a 2-stranded connecting cable.
NOTE: The wheel speed sensors must not be
checked for voltage with an ohmmeter.
Sensor
Installation position.
It also supplies the vehicle speed signal, which is
calculated from the wheel speed sensor signals.
This is transmitted via the CAN bus to the
Powertrain Control Module (PCM)
2006.0 Fiesta
1212006
GI 63291 en