Iveco PC2ED – EDC: Actuator Pump Contact on Actuator Power Supply May Cause Sporadic Re-Initialisations

This fault indicates an intermittent power supply problem causing the Engine Control Unit (EDC) to sporadically reboot or re-initialize. A poor electrical contact or short circuit in the power supply circuit for an actuator (such as the fuel metering unit, fuel lift pump, or turbocharger actuator) causes a voltage drop across the circuit, leading to the module losing and regaining power.

• Daily
• Eurocargo
• Stralis

1. 1

   Check the vehicle's battery to ensure it is fully charged and terminals are clean, tight, and free of corrosion

2. 2

   Inspect the main fuses located in the engine compartment fuse box and near the battery terminal for signs of failure

3. 3

   Visually inspect the wiring harnesses connected to the EDC, fuel pump, and turbo actuator for damage, chafing, or corrosion

1. 1

   Locate the EDC main relay

   Identify the EDC main relay location for your specific model (e.g., T09 on 2006-2011 Daily, or fuses F11/F17 on 2011-2021 Daily).

2. 2

   Test the main relay

   Listen for rapid clicking when the ignition is on. Swap the EDC main relay with an identical non-critical relay. Test the socket terminals to ensure there is a constant battery positive feed and a switched ignition signal.

3. 3

   Check EDC power and ground wires

   Back-probe the EDC connector with the ignition on to verify stable voltage. Perform a voltage drop test on the ground wires between the EDC connector and the chassis ground point. If a poor ground is found, consider adding a supplementary ground wire to the body of the EDC unit.

4. 4

   Isolate the actuator pump circuit

   Trace the power supply circuit from the EDC main relay to the fuel pump and turbo actuators. Disconnect the high-pressure fuel pump actuator, fuel lift pump, and turbo actuator one at a time to see if the sporadic re-initialisation stops. If it stops, the fault lies within that specific component or its dedicated wiring.