Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 814

Speed sensor
ABS rotor
Thickness gauge
Front Rear
ABS <2WD> –
Wheel Speed Sensor
INSTALLATION SERVICE POINT
AA REAR SPEED SENSOR INSTALLATION
Caution
Be careful that the pole piece at the end of the speed
sensor and the ABS rotor teeth do not become damaged
by striking them against the metal parts.
Insert a thickness gauge into the space between the speed
sensor's pole piece and the ABS rotor's toothed surface, and
check the clearance is the standard value all around.
Standard value: 0.1–0.9 mm
INSPECTION
SPEED SENSOR
1. Check whether any metallic foreign material has adhered
to the pole piece at the speed sensor tip, and if so, remove
it.
Also check whether the pole piece is damaged, and if
so, replace it with a new one.
NOTE
The pole piece can become magnetized because of the
magnet but into the speed sensor, with the result that
metallic foreign material easily adheres to it. Moreover,
the pole piece may not be able to function to correctly
sense the wheel rotation speed if it is damaged.
2. Measure the resistance between the speed sensor
terminals.
Standard value: 1.28–1.92 kΩ
If the internal resistance of the speed sensor is not within
the standard value, replace with a new speed sensor.
35B-25