There are two types of wheel speed sensors, active and passive.This video is sponsored by BCA Bearings by NTN.
The only way to diagnose the sensor and circuit is with a scan tool or scope.
Honda indirect TPMS systems do not have air pressure sensors inside the tires.
These types of bearings are used by Toyota, VW and many other import nameplates.
The company says the new wheel speed sensors undergo thermal, shock, vibration, durability and extreme temperature testing.
Firing the “parts cannon” at an active ABS wheel speed sensor code often results in a misdiagnosis and an unhappy customer. It may start with the wheel bearing hub unit or wheel speed sensor. If those parts do not resolve the problem, the technician may fire the parts cannon at the ABS hydraulic control module. Typically, the customer’s patience and wallet runs out before the car is fixed.
Electronic stability control (ESC) became a mandated safety feature for the 2012 model year. Along with all of these advancements, false activation complaints have surfaced. Solving them has been a diagnostic conundrum through the years. False activation incidents involve the ABS modulator taking over braking or intervening to restore vehicle stability. The customer may feel feedback in the brake pedal like a pulsation or sudden drop. Some may also experience a drop in power or the vehicle may suddenly pull in one direction.
The best tool for testing the active speed sensor is a good scanner, preferably one that can show the separate speed sensors in graph form. A lab scope is probably the best for a more precise answer and can be attached directly at the sensor to read the individual sensors or wires, rather than the entire system as with the scanner.