What Are the Differences Between ECU & PCM in Ford

Ford ECU & Ford PCM, are explained herewith complete with their features, functions, and benefits to help readers understand the role and importance of each in running Ford in top condition.

Ford like any other modern car has computerized and programmed components to monitor engine functions and maintain optimal operational efficiency. Ford manufacturers take all the steps to ensure that it is a fuel efficient vehicle and has the power and control to cut through highways and city traffic. All this has become possible because of ECU, i.e. Engine Control Unit or PCM, the powertrain control module.

PCM means Power Control Module; ECM stands for Engine Control Module. Then there is something called TCM, Transmission Control Module. When ECM & TCM are combined in Ford we get PCM. Thus when we place control of transmission as well as engine into one unit, the PCM coordinates better and what we get is better power delivery and better fuel efficiency.

Ford Engine control unit (ECU), also known as Engine Control Module (ECM) is an electronic control unit that controls all the actuators on an internal combustion engine which helps engine to attain optimal or top performance. The fuel injection system plays an important role to control the engine's fuel supply. View Details from here.

The Ford ECM, Electronic Control Module in Ford is a computer fitted and programmed in it that is responsible for controlling all its engine management functions. It is the central control unit that controls functions like electrical system power distribution, emissions, ignition, fuel efficiency etc.

Ford PCM does the work of two modules; the ECU and the transmission control unit as explained earlier. The PCM transfers signals to the body control module to ensure gauges, warning lights and audible signals send signals in turn to the driver about the Ford’s running condition. The PCM can be a combination of three or more different computers.

Ford PCM made in modern times are very different from how ECUs were made its initial stages. PCMs function with help of advanced automatic transmissions and multi-port fuel injection systems. They assist engine and transmission management systems to bring down emissions and improve fuel economy. They also help vehicle acceleration to become smooth, 

improve cold weather starts and enhance engine life. Get more details about Ford PCM from here.

How to Test the PCM on a Ford

A Ford's Powertrain Control Module (PCM) works like the central computer for diagnostic system of the vehicle it is used on. The PCM scrutinizes both, the sensor readings as well as the way engine functions. When a component within the engine or fueling system begins to conk or malfunctions, the PCM immediately issues a code which leads to appearance of the problem label. If the PCM stops working, your Ford's diagnostic system will render unreliable. You can test PCM device within a few minutes.

Before you throw money on testing the PCM on a Ford, or take risks with such an important component, read this post. It should hopefully provide you with some helpful practical tips as you reach out to a technician who can help you test it. PCM Ford is tested with a voltmeter; however you have to know the right procedure to be able to find the right answer.

Playing safe is wise thing to do. Because if you do things based on good guesses and blind shots, chances are you will complicate the matter even further. So doing your homework and keeping yourself informed is the way to go.

Keep a few important materials handy before you begin your own investigation on Ford's PCM. Refer to your OBD-II, i.e. on-board diagnostic scanner's handbook to access your list of generic trouble codes. Look for Chrysler's supplemental OBD-II codes on the net and take its printout. Identify trouble codes that are relevant to your problems. Before getting into the vehicle's driver's seat place the codes you’ve identified in your Ford's navigation seat.

Ford's computer outlet is beneath the dashboard. Connect OBD-II scanner to Ford's computer outlet. Then switch on Dodge’s electronic system. Keep an eye on scanner brand before taking any steps as their working differs depending on their make.  Keep an eye on device display screen. Perform manual code scan unless PCM Ford you have is automatic. Once you generate problem code, solution can be identified and problem can be fixed.