How to diagnose a ABS sensor with a multimeter?

The ABS light comes on automatically, which means that this needs to be checked at any cost. The diverse braking system, including the ABS, must be considered one of the greatest parts of a vehicle. The owner should have faith as much as possible in checking the ABS sensor with the help of a multimeter. In this article, we will try to discuss the full diagnosis process of the ABS.

Summary of Contents

What is an ABS sensor?

The anti-lock brake sensor is always named the ABS sensor, which is one of the integral parts of the system. All the measurements are related to the rotational speed, the combination of the wheel, and the ignition. This is always best for sending the data directly to the engine control module (ECM).

In other words, we need to be more efficient in using the ABS system for the ABS sensor. ECM has the largest antipathy for consuming arbitral miscommunication. The ABS sensors have all the tools for interpreting the information to evaluate whether the wheels are making any necessary competence. You need to focus on the matter that the wheel rotation might not always be at the same speed.

How does ABS work?

The ABS brakes generate a grinding sound that negotiates the arbitral facilities in the main consuming activation chamber. The hydraulic valve has the overall automatic shocking aesthetics numerator. This has the core potential to diminish the pressure on the brake fluid. The speed sensor arbitrates a wheel lock that must initiate the pump activation mechanism. The braking pressure assures the accurate pressure influence. The ABS looks more attractive when the wheel rotates in a new dimension. The active generation of the braking system coordinates a new braking alternative.

The combination of these two makes the system unbeatable. The rear right wheel always performs a generous solid structure that monitors the real speed of the wheels. The job of the ABS sensors makes nothing more compliant as the ABS controller wins it all. When it sends a signal to the ingestion system, the ECM gets agitated, and thus all this makes the wheel start slipping and skidding.

Where is the ABS sensor located?

If you have proper knowledge about the location of the ABS wheel speed sensors, it will be so easy for you to find any problem in minutes. The location varies depending on the proper location of the ABS system.

Some of the ABS are located directly on the axle.

In some perspectives, the mounting bolts have all the credit for handling the ABS system.

You may also see the ABS behind the brake rotor.

In the Bugatti, you will see this section mounted at the wheel. The number of ABS wheel speeds always fluctuates as the internal perspective changes gradually.

There is a four-channel ABS system that might cause a large sensor devaluation. The ABS sensor is normally found at the heart of the main channel. The wheel hub or rotor greatly interprets managing such a vigorous sensor advancement. You will also find a rear differential in some rear wheel supposition. In each car, drive applications are installed exponentially. The ABS sensors give each wheel rotor a maximum front-wheel connotation. There is one sensor that makes the front right wheel consume the rear left wheel.

How to test an ABS sensor with a multimeter?

It is necessary to know the actual process of testing an ABS sensor with a multimeter. When you have an emergency with the ABS system, it is mandatory to insist on a large and quantitative measurement for the owner. Here is a complete process of testing an ABS sensor with a multimeter.

Instruments needed 

  • Clipping and wrench
  • A digital Multimeter
  • Tire rebel jacks
  • Aggressive ABS reading kit
  • ABS coding replacement
  • Floor sematic carpets
  • Brake set measurement kit
  • Battery charger stabilization set
  • Ramp meter and chronometer

The complete process:


You need to start by mounting the vehicle with a car-cracking jack. In the after process, always disconnect the ABS from the sensor cable. Now set the multimeter. The perfect ohms range needs perfect probes insulating on the sensor terminals. The appropriate reading between the Ohmmeter and the ABS condition makes emanating a greater and better outpost almost impossible. Digital multimeters are far away better than Analog ones for measuring the ideology of the Abs meters. Pointers need a massive and intricate performance area for dissecting the ultimate string.


The sensor’s AC voltage reading must be on top of the peak. Lifting the vehicle with a jack may seem so much painstaking, so you must be more attentive. You need to put the car transmission on the streak of massive outflow. The emergency braking system’s activation goes outside the park mode. The sensor diagnosis makes all the rough images. This is typically located at the back of all the wheel hubs.


You need to find the exact location as it will specify all other specific ABS sensor junctions. If you must avoid mixing the sensor, implement all other subjunctive manipulative specifications. While you operate these tests, be sure that you set The Multimeter to the perfect Ohms Range. You must also maintain all these fluctuations, as the omega symbol is much more diverse than these.

The expected resistance assists with the simplicity of the ABS sensor quality. Detach the ABS Cable from the actual range of the anti-lock braking system. After the disconnection of the sensor cable, you need to expose the terminals to make a self-absorbing technology. The wire harnesses have a smooth and flexible pulling apart emotion, so they have a pure connection with the persecuted focus.


The wheel side relies on the probes Of ABS Terminals. The polarity of these measuring Ohms as well as the meter probes, has large sensor terminals. In the end, Evaluate Results like ABS sensors must have a reading between 800 Ohms and 2000 Ohms. Check the meter to see if there are any sorts of bad crumbling.


The car’s sensor model must have the right specifications as well as it needs a proper determination to evaluate whether it is right or not. The 20k Ohms range is almost ideal for consuming the perfect constant value. If the reading is between 0.8 and 2.0, then it is a decent prospect for the device ABS. If you are getting a fluctuating value, it needs a proper replacement. The excessive amount of resistance might be harmful to the overall suspension.

How to test Continuity In the ABS Circuit?

To check the continuity of the ABS Circuit, you need to ensure that the diode is well prepared on the detachment of the negative battery cable. Locate the ABS sensor as well as check for continuity between these two terminals, like the Continuity test. If the sensor is working well, then there is no need to replace the ABS. A multimeter needs to be implemented at each terminal for testing the connections. It is another parameter to verify the wires for the correct connectors.

Check each terminal harness to see if it is contacting the ground. If the multimeter display opens a loop during a continuity test, there must have been something fishy going on in the system. If the wire is defective, then check the receiving and ground stations. The DC Voltage is attached to the metal component of the vehicle. The negative battery terminal must be with a black probe, and the ground must be inserted with the cable formation, as the red probes need a proper connection. There is a 12-volt power supply within the fuse box under the hood. If you find any loose wires, search in the wiring again. The lack of power goes up with evaluating voltage.

The multimeter needs to be amplified to the sensor. Touch the probes as soon as you find appropriate wirings. The proper setting adjusts about 5 volts. Double-check the connections as well as the continuity. The ECU will detect any breakages in the circuit and adjust the fail-safe mode. Each sensor side must defer the end of each wire. Interruptions in the signal may hamper the whole thing. If there are null circuit breaks, then an insufficient atonement within the system.

How to Reset an ABS Sensor?

The process of Resetting an ABS Sensor is so crucial as the performance of the ABS is dependent on the system. The very first thing is to locate the ABS control module. The module is situated near the battery. Discontinue the negative battery cable.

The proper modulation of the ABS Sensor needs to have a core potential as it removes the aggrandized resentment. Press the brake pedal and hold that for quite a few minutes. This will allow the system as well as it captures a bleed off the residual pressure. Reconnect the negative battery cable with the vehicle and the inner amplification system. If it reaches the utmost default location, then it has all been reset.

Final Words

The vehicle’s ABS is a complex system with one-way sensor testing. The multimeter here is so stiffened that The tools must be so much more accurate for diminishing the altitude. The recommended range must cooperate between screening and sampling. If nothing appears, then reassemble the core values. An error message is like a bad indication that must be reassured with core potentialities. Replacing the sensor is the most converging thing that illuminates all the way to the potential aspect.

Using a diagnostic tool for inserting fault codes is essential for the system’s growth. Visual inspection of the sensors also showed a faulty ABS system is so coarse for the entire system. So keep all ABS sensors clean. Replace them in case of a bad and faulty ABS mechanism. That is how you can take the help of a digital multimeter to test the ABS system of a car.

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