The amber ABS fault light is illuminated on a vehicle's instrument panel. The vehicle contains a four channel permanent magnet sensor ABS brake system. All of these are true except.
The gap between the sensor and the tone ring is critical with PM sensor operation.
Oversized tires will have an adverse effect on this ABS system.
Permanent magnet sensors and companion tone rings produce a AC frequency converted to DC pulses by the ABS controller.
Permanent magnet sensor systems function well at speeds below 5 mph.