My Current Draw is Too High

If your ECU is drawing more current than expected, consider the following steps:

Disconnect all wires connected to the ECU except for Vpwr, ground, and ignition. Refer to the Technical Specification for the appropriate pins for these connections.

If the current is still too high, inspect your wiring harness for a short circuit between these pins and wires.

If your current measurement now aligns with expectations:

  • Reconnect each wire one at a time to isolate which circuit is responsible for the high current draw.

  • Check your wiring harness for short circuits.

  • Examine your inputs and actuators for short circuits.

My Current Draw is Too Low

If your ECU is drawing less current than expected, consider the following steps:

Ensure the ignition pin and Vpwr are connected to the same voltage source. The ECU will not wake if the voltage at the ignition pin isn’t high enough. Refer to the Technical Specification for the ignition pin.

Use a probe to ensure there’s at least 7V at Vpwr and the ignition sense pin.

Check the continuity in your wiring harness for the following signals. Refer to the Technical Specification for your ECU’s pin-out:

  • Vpwr

  • Ignition sense

  • Ground

While doing the above, confirm that each pin is located correctly. For example, if Vpwr should go to pin A27, ensure it’s not on A26 or A28.

Make sure the pins are properly seated in the harness connector. An improperly seated pin can lead to an intermittent or missing connection when plugged into the ECU.