What should the resistance be on a wheel speed sensor?
What should the resistance be on a wheel speed sensor?
The resistance specs will vary depending on the application, but most sensors should read 450 to 2200 ohms (always look up the exact specifications because they can vary a great deal from one vehicle application to another). If a sensor reads open, shorted or is out of specifications, it can’t generate an accurate signal and must be replaced.
How does the scan tool work on a wheel speed sensor?
The scan tool will display a speed input in miles per hour (mph) for each wheel speed sensor. Most wheel speed sensors (except for the latest generation of “active” WSS sensors) won’t generate a readable signal until a vehicle is traveling 3 to 5 mph or faster.
Is the tone ring on a wheel speed sensor the same as the original?
To produce an accurate signal, the sensor’s tone ring must have the correct number of teeth for the application. Make sure the tone ring on a replacement rotor, drum, axle shaft or outboard CV joint is the same as the original if any of these parts have been recently replaced, or need to be replaced.
What is the ABS sensor on a Mercedes?
Find and fix Mercedes ABS sensor also known as the wheel speed sensor or the anti-lock brake system. Step by step detailed video showing how to fix this annoying problem that can cause cruise control, tire pressure, abs sensor read problems Loading…
How many ohms does a wheel speed sensor need?
The specification for active sensors is between 1,000 and 2,500 ohms. With the meter set to AC voltage, spin the wheel by hand. The sensor should produce between .5 to 1 volt of AC current. The faster the wheel is spun, the more voltage is produced. Some vehicles will send a DC voltage to the sensor through the ground wire.
Where is the sensor located on a wheel?
This is a typical reading from a wheel sensor. Configuration of the sensor mounting is different for each manufacturer but follow the same operation. In the image below a stator ring or as it is sometimes called a reluctor can be located inside the bearing hub, rear axle housing, or on the CV joint itself.
How does the speed sensor work on an ABS wheel?
With the meter set to AC voltage, spin the wheel by hand. The sensor should produce between .5 to 1 volt of AC current. The faster the wheel is spun, the more voltage is produced. Some vehicles will send a DC voltage to the sensor through the ground wire.
How does the voltage in a wheel sensor vary?
This voltage will vary according to the speed in which the hub or wheel is spun. As the hub begins to spin the voltage will rise and then decrease as it stops. Slowly spin the hub or axle which will produce the voltage, if no readings can be found the sensor has failed and replacement is required. This is a typical reading from a wheel sensor.
