Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

Testing of the coil pack and ECU on the Fiat 500

Model: Fiat 500 312 - Years: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
Part: Control unit

See other generations:
Video tutorial

In this video, we are explained how to perform the test of the coil and the ECU functionality on the Fiat 500: these are defects that occur with a certain frequency on this car, so being able to perform a test is important; a faulty coil can also damage the ECU. To test it, we must test all four pins of the coil compared to the first one, which is the common input at 12 Volts and the output should be between 0.3 and 1 Ohm. If these measurements are correct, we must check that there is no internal short circuit between the primary and secondary coil.

If the reading is not good, it means that the ECU has been damaged and will need to be replaced, after which a relearning procedure must be followed: we start the engine and let it warm up above 77°C, and with the gear lever in neutral, we accelerate three times up to 4000 rpm, then release the pedal completely, bringing the rpm down to idle.

We turn off the engine and wait for a minute to let the information be stored.


Posted on 28 February 2025 by ScegliAuto


Related tutorials

Replacing Coil, Leads, and Spark Plugs on a Fiat 500
Replacing Coil, Leads, and Spark Plugs on a Fiat 500
Fiat 500 (2007-2024 / 312) In this video, see how to replace the coil, leads, and spark plugs on a Fiat 500: open the bonnet and remove the air filter located above the engine …
Replacing and Installing the ECU on the Fiat 500 Abarth
Replacing and Installing the ECU on the Fiat 500 Abarth
Fiat 500 (2007-2022 / 312) In this video tutorial, you will learn how to remove and replace the ECU of the Fiat 500 Abarth, following the instructions below. First, open the bo…
How to Replace the ECU in the Abarth 500?
How to Replace the ECU in the Abarth 500?
Fiat 500 (2007-2022 / 312) In this tutorial, see how to replace the ECU in the Abarth 500, a very simple and quick operation. First, ensure the key is not inserted, then open t…

    Frequently Asked Questions

    • 500 2007-2024 - Where is the bluetooth control unit of the Fiat 500 located? Read answer
    • 500 2007-2024 - Ebd failure on Fiat 500, what does it mean? Read answer

How to Activate or Deactivate 4x4 Traction on a Toyota RAV4

Below are the steps to activate or deactivate the 4x4 traction on a Toyota RAV4, following the instructions provided. First, get in the vehicle and start the engine; then press the 4x4 traction button located on the left side of the steering wheel to deactivate it. With the 4x4 traction deactivated, the warning light will illuminate on the instrument panel; simply press the button again to activate the vehicle's four-wheel drive, allowing you to tackle off-road or rough terrain.

Watch the video!


by ScegliAuto

More videos