mass air flow sensor testing procedure

See your meter users manual if necessary to connect the red lead to the correct jack on your meter. They compare the readings to the specifications or to the readings of a known-good mass airflow sensor.

Mass Airflow Maf Sensors

How to test a MAF Sensor using a basic multimeter without having to look up a wiring diagram.

. How the mass air flow sensor is tested. Testing The MAF Sensor With A Multimeter. Sensor testing performs two purposes.

You need clear access to the mass air flow sensor housing without removing it from the vehicle. To test the mass sensor first thing you need to do is to put off the ignition switch and then plug the MAF electrical connector. 000 959.

Follow along and let me teach you some fundamental tests that I use on every vehicle that has a low power complaint. In modern cars the only way to test the mass air flow sensor is with a scan tool. The Mass Air Flow Sensors Ground Wire Test.

In the case of the MAF sensor the code will be between P0100 to P0199. Disconnect the connector of the MAF sensor. Here is a video on how you can test your MAF Sensor using a basic 5 Multimeter.

Mass air flow sensor performance is often characterized by frequency testing. Backprobe the sensors signal wire with your meters red lead and the ground - wire with your meters black lead. How the mass air flow sensor is tested In modern cars the only way to test the mass air flow sensor is.

Set your DMM to the Frequency scale. If the MAF is bad either because its not producing a signal or producing an erratic one the cars idle will return to normal and the car will seem to run fine. Mechanics measure the amount of air flow mass air flow sensor readings at different RPMs.

If you liked this video you may find these other videos useful. Once you have access to the mass air flow sensor carefully remove any larger pieces of dirt such as leaves or small stones etc. Set the multimeter to 20 volts.

The following test is an on-car test that checks the performance of the MAF sensor with the engine running. Low power lean conditions cracked air intake tube GM. Physically Inspect the MAF Sensor for Debris.

Mass Air Flow SensorsMAF are one of the most important sensors used to control your vehicles engine. How to test a GM MAF Sensor Part 2 How to test a GM MAF Sensor Part 1 Page 1 of 2. Remove the air filter housing cover and check the condition of the engine air filter.

Connect the black lead of the multimeter to the ground terminal of the MAF sensor and connect the red lead to the battery positive source or the positive wire inside the MAF sensor connector. Although MAF sensors will vary in their setup from one car to another generally there are 3 basic test that are done to see if it has failed or not. Making sure the MAF sensor is getting power.

Inspect the sensors electrical connectors terminals for discoloring or damage. This is also a chance to carry out any required calibrations. The first is to verify that the device definitely works at its desired specifications and the second is to define the working specifications.

These codes indicate an issue with the fuel and air metering system. With a digital multimeter. The procedures shown in this video can be applied to all 3-wire General Motors MAF sensors.

In this article I am going to briefly explain the three basic multimeter tests that are done to find out if its bad or not. Making sure that the sensor is getting Ground. In this test tutorial Ill show you how to test the mass air flow sensor to see if its bad and lighting up the check engine light or not.

Youll test this GM MAF sensor with a multimeter that can read Hertz Hz frequency. Plug in the MAF sensors electrical connector. No scan tool is required or any other expensive testing equipment.

Yes a digital multimeter can be used in testing the mass air flow MAF sensor. The affected part may be the mass airflow sensor or throttle body. Using a suitable scanner perform a MAF sensor data reset procedure to reset the adaption values in the ECU.

Low power lean conditions cracked air. I also show you how you can figure out the wires without a wiring diagram. Dirty MAF Sensor Case Study.

Remove the mass air flow sensor. You may need to remove the air filter box completely. Turn the ignition switch to OFF position.

A Mass Air Flow Sensor costs 100 and 400 and you can expect the labor costs to be 40 to 150. These three tests are. Chevy Buick Olds GMC Cadillac The frequency specification I quote in this video will differ depending on engine size but the electrical tests shown particularly in part 2 are universal and apply to ALL GM MAF sensors.

Although Im not going to be going into details about each of the different type types of MAF sensors I will show you where you can find tutorials to. VW Mass Air Flow MAF Sensor Test 5 Wire Type The most common way to test the 5 wire VW Mass Air Flow MAF sensor is just to unplug it with the engine running. Make sure it is clean and clean the air box if needed since that can also affect the air flow.

Then black probe the ground wire which is usually with the negative sign with a meters black lead and also the sensor signor wire the one with the positive sign with the meters red lead. Wait for 5 secs. This is one of the easiest mass air flow sensors to test.

Perform KOER self-test procedure. View More About This Video. This MAF test is done in 3 easy steps.

Power is in the form of 10 to 12 Volts DC. You can use an onboard diagnostics scanner to read the code from the engine control unit. Mass air flow sensor testing with a multimeter without dismantling.

All youll need to test the MAF sensor with this tutorial is a multimeter that can read Hertz frequency if you dont have one Ive made a recommendation on where you can buy a reasonably priced. Perform KOEO self-test procedure. How to test your mass air flow sensor MAF and to quickly know if it is defective.

Learn how they work as well as how to clean them for.

Mass Airflow Maf Sensors