Fiat Punto 1.2 litre IAW 59F ECU year 2000 onwards

Fiat Punto ECU

The ECU for the Fiat Punto 1.2 Litre vehicle between 1999-2011 is a Magneti Marelli IAW 59F/5AF ECU type, and is located at the back of the throttle housing.

What goes faulty?

The engine ECU for the Fiat Punto 1999-2011 is prone to multiple failures, with one of the most common being related to the ignition coil. When the ignition coils starts to fail, it will create a voltage spike that travels back to the ECU, damaging the coil drivers inside of the unit. These blown coil drivers within the ECU will cause it to fail, resulting in engine misfires on two cylinders.

How to diagnose:

To diagnose a problem with the Fiat Punto ECU first connect a diagnostic tool to your vehicle to check for the presence of any error codes, which will help you to identify any specific issues that may be related to the ECU. Then look for any signs of damage, corrosion, and loose connections with the wiring and connectors, which are connected to the ECU, as this can cause issues.

Furthermore, ensure that the ECU is receiving the proper power supply that it needs by checking the condition of the battery and alternator, as a weak or faulty battery or alternator can cause issues with the ECU. As a last step, check the ignition system, including the spark plugs and ignition coil, to make sure that they are functioning properly, a faulty ignition system can cause voltage spikes that can damage the ECU.

Solution

We no longer offer rebuild service for this type of ECU, if your Punto engine ECU has failed, the solution is to replace the ECU with a new or used unit. But, when doing so always ensure that the part numbers match exactly.

It is recommended, when replacing the ECU, to also replace the coils, by replacing the coils at the same time as the ECU, it well help to ensure the replacement unit operates properly, avoiding any further damage from a faulty coil, and preventing premature failure of the ECU.

Common Failure symptoms:

• Misfire on two cylinders
• Illuminated engine management light (EML)

Common fault codes:

• P0351 - Ignition Coil A Primary/Secondary Circuit Malfunction
• P0352 – Ignition Coil B Primary/Secondary Circuit Malfunction
• P0115 – Engine Coolant Temperature Sensor 1
• P0300 - Ignition Failure Generic

Affected Vehicles:

• Fiat Doblo 1999-2006
• Fiat Panda 2003-2011
• Fiat Punto 1999-2011
• Fiat Seicento 1999-2011

Common failing part numbers:

IAW 59F.E4 / IAW 59F.ET / IAW 59F.M1 / IAW 59F.M2 / IAW 59F.M3 / IAW 59F.M5 / IAW 59F.M7

IAW 59F.SC / IAW 59F.SC / IAW 5AF.DE / IAW 5AF.P3 / IAW 5AF.P4 / IAW 5AF.SM / IAW 5AF.SP

61600.376.02 / 61600.376.03 / 61600.376.05 / 61600.389.04 / 61600.376.06 / 61600.376.07

61600.389.06 / 61600.444.02 / 61600.376.09 / 61600.444.03 / 61600.389.09 / 61600.444.04

61600.468.02 / 61600.389.10 / 61600.444.05 / 61600.468.04 / 61600.468.05 / 61600.507.03

61600.507.05 / 61600.507.06 / 61600.590.02 / 61600.604.04 / 61600.651.02 / 61600.651.03

61600.651.04 / 61601.069.02 / 61601.070.02 / 61601.071.02 / 61601.069.03 / 61601.069.04