Same as the ECU supply. But when the PDM digital input function Ignition on is turned off, the engine is turned off, but the ECU is automatically kept on for some additional time to allow it to run fans and other functions after the engine is turned off.
The additional time is set by the ECU, see power hold. No additional wiring is needed to use this function with the PDM (no relays etc. as would be necessary without the PDM).
