The vehicle which i have been assigned it used an analogue type sensor.
This is an inductive type sensor, and this type use a small internal magnet and coil of wire to generate a signal to the Electronic Brake Module. A gear shaped tone wheel that rotates near the sensor on each wheel. As the tone wheel rotates, a small magnetic field fluctuates around the sensor and induces AC voltage into the internal coil windings. AC voltage is sent to the EBCM, which is interprets the voltage and frequency as a wheel speed signal input.
As toothed ring passes by the wheel speed sensor changes in the electromagnetic filed cause the wheel speed sensor to produce voltage signal it high/low toggle rather an analogue voltage like with a passive sensor.
Measure the air gap for each wheel sensor .
Front Right : 0.8mm
Front Left : 0.8mm
Rear Right : 0.6mm
Rear Left : 0.6mm
Using an oscilloscope connect it to a wheel sensor and record the pattern shown if the sensor is an analogue sensor then just connect then probe and spin the wheel.If the sensor is digital you will need to have the ignition on before you turn the whell.
No comments:
Post a Comment