how to test mass air flow sensor with scanner

How To Test The GM Mass Air Flow Sensor Early Type. The procedures shown in this video can be applied to all 3-wire General Motors MAF sensors.

Mass Air Flow Sensor Maf Testing Without Dismantling Youtube

The trouble code are retrieved and analyzed via digital scanner.

. Set your DMM to the Frequency scale. Turn the ignition switch to the Off position. 000 959.

As stated before the mass air flow test is a very easy and simple test but there. Open the hood of the car. This list covers the majority of symptoms Ive seen on these types of Ford mass air flow sensors.

Disconnect the connector of the MAF sensor. The most common symptoms of a bad MAF sensor are. Below are the trouble codes associated with a mass air flow sensor.

This wire is heated by the MAF with a pre-calculated voltagecurrent value. Fuel trim code s. The mass air flow MAF sensor reads the air flow entering the engine.

Its primary role is to detect the air mass flow rate getting into the engine. Vehicle may idle rough and stall. These codes indicate an issue with the fuel and air metering system.

Httpsamznto2DTTDuJEngine light is often triggered by bad or dirt. While pulling the connector squeeze the tab on either side of the harness. MASS AIR FLOW SENSOR TEST Scanner Used in the video.

A bad mass air flow sensor will usually trigger a check engine light. You can use an onboard diagnostics scanner to read the code from the engine control unit. HOW TO KNOW IF MAF SENSOR IS BAD.

Make sure you only pull on the connector and not the wires. How the mass air flow sensor is tested In modern cars the only way to test the mass air flow sensor is with a scan tool. The mass air flow sensor MAF has become a standard part on most engine applications and is mounted in the intake air stream just past the air filter.

MAF Codes that light up the check engine light CEL on your instrument cluster. Symptoms Of A Bad MAF Sensor. A tremendous lack of power upon acceleration.

Is there a way to test a mass air flow sensor. The coded signal will illuminate the Check Engine Light on the dash board. The MAFs report to the Engine Electronics DME aka ECU the amount of air that is drawn into the engine and what temperature this air is.

Connect the black lead of the multimeter to the ground terminal of the battery or chassis and the red one to. Mass Air Flow MAF Circuit Low Input. How it Works.

Performance range of Mass Air Flow Circuit. Wont pass the emissions test. All you need is a multimeter.

A lot of people dont completely understand mass airflow sensors and how to tell if they are working properly or not. Plug in the MAF sensors electrical connector. On some MAF sensors this reading should be 25 volts.

A MAF sensor code. Black smoke coming from the tail-pipe. Lean andor rich code s.

This is because the ECU will detect an out of range value coming from the MAF sensor and the check engine light is its way of letting you know that something is wrong. Trouble codes P0171 System Too Lean Bank 1 and P0174 System Too Lean Bank 2 are also often caused by a bad or contaminated mass air flow sensor. The MAFs Mass AirFlow meters are located in the M5 and Z8 air intake tubes.

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. The Mass Air Flow Sensors Power Wire Test. Having said that a scan tool is one of those MUST have tools to be able check and diagnose todays modern cars and trucks.

The engine can never work better than its MAFs. Malfunctioning of Mass Air Flow Circuit. To check the MAF sensors voltage signal and frequency connect a voltmeter across the MAF voltage signal wire and ground wire.

A defective MAF sensor can cause engine stalling a rough running engine and a check engine light for trouble codes like code P0171. Check Engine Light appearing on the dashboard. Mechanics measure the amount of air flow mass air flow sensor readings at.

Mass Air Flow MAF Circuit High Input. Ford has used a Hot-Wire type mass air flow sensor for many years that. Set the multimeter to 20 volts.

Start the engine and observe the voltmeter reading. Disconnect the mass airflow sensor from the electrical connector. The affected part may be the mass airflow sensor or throttle body.

In the case of the MAF sensor the code will be between P0100 to P0199. The MAFs are vital to the proper function of the S62 engine. MAF sensor malfunction that DOES NOT light up the check engine light CEL.

Find out how to test a MAF sensor and how to replace a defective one with these tips from our mechanics. I recommend using a digital multimeter but an analog multimeter can also be used. Because of this a lot of MAF sensors.

Plug in the MAF sensors electrical connector. As mentioned earlier you dont need an automotive scan tool to test the MAF sensor. How the mass air flow sensor is tested In modern cars the only way to test the mass air flow sensor is with a scan tool.

It measures the amount of air volume in the intake flow by way of a thin wire mounted in the air stream. Testing a MAF sensors frequency signal. Testing the Ford mass air flow MAF sensor on all of the Ford Lincoln and Mercury cars and trucks is a very simple test that can be done without a scan tool.

If your hands slip off the connector it is good to wear gloves with a. Open the hood of the car. Buick Chevy Olds Pontiac 31L 34L 43L 50L 57L V6 Engines 1996-2005.

See your meter users manual if necessary to connect the red lead to the correct jack on your meter.

How To Know If Maf Sensor Is Bad Mass Air Flow Sensor Test Youtube