BEST OF 2018: How To Probe A Wheel Speed Sensor Harness
In one of the best videos of 2018, Andrew Markel explains the proper way to probe a wheel speed sensor harness without damaging the insulation of the harness. Sponsored by BCA Bearings.
Active Wheel Speed Sensor Logic
Firing the “parts cannon” at an active ABS wheel speed sensor code often results in 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.
VIDEO: Wheel Speed Sensor Harness Repair And Electron Flow
Andrew Markel follows up on a previous video on wheel speed sensor harness repair, focusing on how voltage and electricity flow through the harness and how a splice may not last forever. Sponsored by BCA Bearings.
VIDEO: Don’t Try To Repair A Wheel Speed Sensor Harness
Andrew Markel discusses wheel speed sensors, and how a repair should generally not be attempted on its wiring. Sponsored by BCA Bearings.
VIDEO: Wheel Speed Sensors And Steering
Andrew Markel discusses wheel speed sensors, and how they determine the turning state of a vehicle. Sponsored by BCA Bearings.
Thinking Through False ABS/ESC Activation Events
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.
Testing Active Wheel Speed Sensors
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.
VIDEO: Probing A Wheel Speed Sensor Harness
Andrew Markel explains the proper way to probe a wheel speed sensor harness without damaging the insulation of the harness. Sponsored by BCA Bearings.
Replacing Wheel Bearing Hubs Equipped With Wheel Speed Sensors
When engineers came up with the idea of putting the wheel speed sensor (WSS) and tone ring inside a sealed wheel bearing hub assembly, it seemed like a great idea. The sealed environment would help protect the sensor and make it less vulnerable to damage or contamination from the outside.
VIDEO: Diagnosing And Replacing Wheel Speed Sensors
Andrew Markel goes over passive and active wheel speed sensors and shows why replacing one may be a better solution than repairing. Sponsored by Standard.
Impact Damage On Wheel Hubs
When a driver hits a pothole or curb hard enough, extreme forces are put onto the balls or rollers and races of the bearing. This can result in the formation of a very small mark on the surfaces. The driver might go 1,000 miles or more before these components start making noise.
Servicing Wheel Bearings & Wheel Speed Sensors
If you are replacing a wheel bearing on a late-model vehicle, you’ll be dealing with a wheel speed sensor. In the past decade, wheel speed sensors have been moving from differentials, axles and knuckles to inside or on the wheel bearing or hub unit. At this location, the sensors are more accurate and often more protected from the elements.
