Removal and installation
The pulsator wheels are integral with the front CV joints or the rear hub assemblies. If the pulsator requires replacement, a new joint or hub must be installed. The gear wheels can be inspected for damaged teeth without removing them.
Checking the air gap
The air gap between the sensor tip and the pulsator is very important for the correct operation of the system. The gap is determined by the correct installation of the speed sensor; it can be measured but cannot be regulated.
Use a non-metallic probe to measure. Slowly rotate the hub by hand and take several measurements in different positions. The gap should be between 0.4-1.0 mm. If it exceeds 1.0 mm in any position, there is a high probability of damage to the suspension knuckle.
Accessing the Prelude's rear pulsator and sensor requires removing the wheel, caliper, and brake rotor.