PJZook shows diodes on his baleno wiring diagram and looking in the FSM they are in the junction box, But I've already binned mine so I can't crack it open and have a look.
The last thing I want to do is fry my ECU.

EDIT: Showing my noob here, Are the diodes there to stop other conneted loads from turning on? E.G, rear demister and headlights both connect to ECU idle up and the diodes stop the headlights turning on if the demister is turned on?