Page 171 - Workshop Manual - Aumark (BJ1051)

04-27
Diagnose- ABS system

4-1 ABS Sensor/Shorted (Right Front Wheel)

4-2 ABS Sensor/Shorted (Left Front Wheel)

4-3 ABS Sensor/Shorted (Right Rear Wheel)

4-4 ABS Sensor/Shorted (Left Rear Wheel)

Tip:

Since the 4 ABS sensors use same control mode, the diagnostic procedure for ABS sensors of left
front, right rear, and left rear wheels is the same as that for the sensor of right front wheel.
Description

1. Speed sensor detects wheel speed and
transmits signals to ABS control unit.
speed sensor 04
These signals are used to control ABS
Rotor magnet
coil control system. Both front and rear
to ABS rotors are provided with a serration.
2. When a rotor rotates, the magnetic
field formed by the permanent magnet

low speed on the speed sensor will generate an
High speed alternating voltage.
3. Frequency changes of this alternating
voltage is directly proportional to
rotor speed, so the ABS control unit
can use this frequency to detect speed
of each wheel.

Page 171