Another method to test BMW wheel speed sensors is to use a digital multimeter and measure resistance. Remove each wheel one at a time. Disconnect the ABS sensor wire and measure the resistance of each sensor. ABS sensor resistance should measure around 1000 ohms.
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How do you know if your ABS speed sensor is bad?
Five Common Signs of ABS Wheel Speed Sensor Failure
- Sign #1: The ABS Light Stays On.
- Sign #2: Traction and/or Stability Control is Disabled.
- Sign #3: It Takes Longer to Stop Your Vehicle.
- Sign #4: Your Vehicle Becomes Unstable During Braking.
- Sign #5: ABS Works Erratically.
What are the symptoms of a bad ABS module?
Signs Of A Faulty ABS Module
- The ABS Warning Light Glows. This is the most common sign of problems with the ABS system.
- The Brakes Lock Up. The ABS system is specifically designed to prevent any wheel from locking up during heavy braking.
- An Unresponsive Brake Pedal.
- Increased Pedal Effort.
- Speedometer Failure.
What happens when ABS wheel speed sensor goes bad?
loss of stability and traction control: if it detects a bad wheel speed sensor, the abs computer will usually disable the stability and traction control systems, as well. on some vehicles, a bad wheel speed sensor may affect other functions as well, such as hill-start assist and roll stability.
How many ohms should a speed sensor read?
The typical reading for a passive wheel speed sensor is between 1,000 and 2,500 ohms. This is a normal range for all passive sensors. The specification for active sensors is between 1,000 and 2,500 ohms.
What is the resistance of a wheel speed sensor?
A wheel speed sensor and circuit will usually have a resistance of 800 to 1400 ohms. Measure the resistance across the sensor itself if it has too much resistance.
How many ohms should a ABS sensor have?
On a passive ABS sensor, measuring resistance across the signal and ground leads generally produces a reading of 800-2000 ohms. A steady reading within this range indicates a good sensor. If the resistance is constantly changing or increasing on the meter, the sensor is faulty.