Skylark L4-144 2.4L DOHC VIN T SFI (1997)
Wheel Speed Sensor: Description and Operation
Front Sensors
DESCRIPTION
The front wheel speed sensors are of a variable reluctance type. Each sensor is attached to the knuckle assembly in close proximity to a toothed ring.
An AC voltage is generated when the toothed ring passes by the sensor. The magnitude and frequency are proportional to the speed of the wheel and
both will increase with increasing speed. The sensor is not repairable, nor is the air gap adjustable. However, air gap should be between 0.5 mm
(0.020 inches) and 1.7 mm (0.070 inches).