Pardon my poor english. I'm a Dutch Multipla user. I hope someone can help me.

Trouble strarted with the code sys failure. At the same time ecu can not be connected to by OBD device. That why we suspected a failure in power to the ECU.
We found out that the relay (red one at front of box next to battery) gets no switch signal from the thin orange wire. If I put ground on the connector of the relay it switches correctly and code sys failure is gone and ecu is up and running again it seems.

Questions:
Is it correct that the relay has a permananet plus and a switching ground?
Where does the switching ground comes from which is used to switch the relay?
What would go wrong if I create a new ground to the relay, which switches of and off by switching the keycontact?
Is there any ground available that switches on and off when turning contact (with key) on and off?

Thanks in advance!

ADDITION TO: Multipla JTD - code sys failure / problem with relay

I've added 2 photo's of the relay that is malfunctioning:
Photo01 shows the location of the relay. The yellow wire is the temporary extra minus/zoro to feed the relay directly from the minus/zero of the battery so the relay is permanent on.
Photo02 shows the wires to the relay. Below mid the in red the permanent plus. Below left the thinner yellowish-white wire that I suppose is used to switch zero/minus to the relay.

Looks like you could do with a wiring diagram. I'm not sure if there's one on ePER, but might be worth a look. Other than that, it might perhaps be worth posting the question on the Polish Multipla forum. There are guys there with far greater knowledge of it than you'll find on FF

I just got a MK2 multipla going by changing this red relay with orange wires to it.
Guy had ECU, transponder and all sorts changed and checked. Is it not getting power from key transponder circuit to switch the relay ?
Did you find a diagram you can share?
Many thanks for posting.

Where do you live in Holland, I'm Dutch too....