How to Repair VW POLO Engine ECU?

The owner of the VW Polo 1.4 petrol 2004 model crashed vehicle called our garage and said that he had an unfortunate accident and that the ECU (Ecu Repair) was broken.

We wanted him to send the ECU with us. When we got it, we observed that the ECU was Magneti Marelli-IAW4MW.DD.
Repair of VW POLO ECU (Magneti Marelli-IAW4MW.DD)

We made a connection between the pins of the Magneti Marelli-IAW4MW.DD engine ecu and the Ecutest Ecu Simulation and Test Device.

We made this connection with the Universal Socket, which is provided when you buy the Ecutest Ecu Simulation and Test Device, which allows you to easily connect to all heavy vehicle and passenger engine ecu.

Upon the request of our customers, we can make it in the original socket of each engine ecu, so you can connect the socket directly to the ECU and make your connection.

After we make our connection, we pain our simulation of the Ecutest Ecu Simulation and Test Device from the computer. After selecting the vehicle brand and model, we approve the ECU Magneti Marelli-IAW4MW.DD and enter our simulation screen.


When we run our simulation screen, when we check the injectors and ignition coils, we observe that the ignition coil numbered 1 and 4 do not ignite, do not work, and malfunction as a red light on the simulation screen.

Later, when we checked the valves, sensors and supply voltages of the Magneti Marelli-IAW4MW.DD ecu, we found that there was no problem. We see the circuit element that controls the ignition coils by clicking the “Component Description” button on our simulation screen.

Then, by clicking on “Electric Diagram”, we see the pin ends and signal types that ignition coils numbered 1 and 4 are connected.

Thus, thanks to the Ecutest Ecu Simulation and Test Device, we easily learn the circuit element, pins and pin information of the ignition coils.

With the help of the multimeter, we follow the path from the pins of the ignition coils numbered 1 and 4 to the circuit element to which they are connected, and we see that there is no problem on the way.

Then, when we check the integrated integrated to which it is connected, we find that the integrated has lost its function.

With the help of a soldering iron, we remove the defective integrated without damaging the ECU and place the solid one in its place.

When we checked the Magneti Marelli-IAW4MW.DD ecu by reconnecting it to the Ecutest Ecu Simulation and Tester, we observed that the problem was resolved and the ignition coils numbered 1 and 4 were working without any problems.

Thus, Ecutest Ecu Simulation and Testing Machine enables us to solve the problem of the Magneti Marelli-IAW4MW.DD engine ecu in the fastest, easiest and lowest cost. We deliver the ECU to our customer.

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