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Honda CRV Abs Speed Sensor

How to Spot Problems with Your Honda CR-V ABS Speed Sensor

Like many of its contemporaries, your Honda CR-V has an anti-lock braking system (ABS) that helps you control the wheels to avoid skidding. This system has three main components: a controller, a couple of valves, and a speed sensor for each wheel. The sensors take note of whether your tires are rotating properly or not. When it senses that the wheels have suddenly stopped turning while the car is still moving, then the controller will tell the valves to release a little brake fluid so that the wheels can rotate again. But, this safety system isn't foolproof, and things can go wrong with its components. Here's how you can diagnose any issues with your Honda CR-V ABS speed sensor:

The ABS light

The first sign that you'll notice when something goes wrong will be a bright ABS light on your dashboard. This can indicate a lot of problems, but you will first need to make sure that it isn't just a glitch in the controller. Just turn your ignition off and then back on again. If the light does not go out, use a scanning tool to find out where the problem lies.

You might get a hint that there's a problem with your ABS speed sensors if your ABS lights come on after you drove over a rough road or through wet weather. But, the scanning tool will be able to find out what the actual problem is with your sensors.

The ABS speed sensors

Get your CR-V up on a couple of jack stands and remove one of your rear wheels so you can test its ABS speed sensor, which is located near the strut housing in the wheel well. Then, remove the sensor with a ratchet and examine its ends. There might be some fur-like contaminants disrupting your sensor, so you'll need to clean them off with some brake cleaner and a rag.

Afterwards, you'll need to check if your sensor still works by using a voltage meter. Make sure that you disconnect the engine harness from the sensor wiring harness beforehand. Then, just use the meter on both the input and output ends of the sensor. If the meter shows a reading of infinity ohms, then your sensor needs to be replaced. Meanwhile, if you get a reading of more than 5 volts, then your sensor is failing and it has to be replaced soon.

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    Losing traction while driving your Honda CR-V can be a heart-stopping moment. As you feel the brake pedal pulse under your foot and as you hear a grinding noise, you can be thankful that you've got an anti-lock brake system (ABS) that will help you regain control on your crossover's wheels. This system has a controller that monitors four speed sensors, one behind each wheel. When one of your wheels rapidly decelerates or stops moving even as your CR-V continues to move, then the sensor tells the controller that something is wrong. The controller then tells a couple of valves to release the brake fluids for that faulty wheel so that you can regain control of the wheel.


    The science of your ABS speed sensors

    Your Honda CR-V ABS speed sensors are able to do this because each one is made up of a magnet that is attracted to a reference ring. The ring spins at the same speed as the wheel the sensor is monitoring. The ring produces a signal that the magnet interprets for the ABS controller. Because of this important job, it's essential that you take care of your four Honda CR-V ABS speed sensors.


    Determining your ABS speed sensor type

    The best way of maintaining your speed sensors is to free them from the miniscule contaminants that can make them harder to read the speed of your wheels. But before you can do so, you will first need to determine the type of speed sensor that you have. To do so, lift up your CR-V on some jack stands and remove one of your wheels. Then, check if the reference ring is visible behind the brake rotor of your wheel. If it is, then you have an exposed type speed sensor. If it isn't, then you've got a concealed sensor that's located inside the differential housing.


    Cleaning exposed ABS speed sensors

    Because it is exposed to the elements, your speed sensors are more likely to pick up metal contaminants that are attracted to the magnet inside it. So, you'll need to clean the sensors regularly. Begin doing so by removing the sensor from its mounting bracket before wiping it gently with a rag sprayed with a de-greasing agent. Afterwards, clean the reference ring with a non-metallic brush and the de-greaser. Don't forget to rotate the hub so that you can clean the entire ring before re-installing the sensor.


    Cleaning hidden ABS speed sensors

    Cleaning a hidden speed sensor is almost the same as cleaning an exposed sensor. But, you will need to work through the mounting hole so that you can access the reference ring. Use a brush that's small enough to fit the hole and some compressed air to help you remove the contaminants. The good news is that you don't need to do this often because the sensor isn't that vulnerable to the elements.