Mystery wire help and suspension fault on 355 2.7

Hello all -

I come again seeking help in my low knowledge/skill Ferrari DIY maintenance. I have two issues that I doubt are related but would appreciate thoughts on:
1) Suspension fault which is consistently on. I recently (about 2-3 months ago) had all 4 actuators overhauled by Captain Z and all was well since then until yesterday. I pulled all 4 and the gears on the dampers all look fine and turn normally through their range. Looking inside the actuators, the internal 'gears' all look OK as well. I will shortly do the test for seeing the internal gears moving by turning the car on but need an assistant for that. Assuming all looks normal on both damper gears and actuators, what are my next diagnostic steps? In searching older threads, it seems brake pressure sensor or speedo wiring could contribute... Maybe the damper ECU?

2) I found a cut wire that looks like a grounding wire of some sort and have no idea whether this is a relic of some prior aftermarket device or something important. I have no idea what the cut end was connected to. I can not find any visible other cut end anywhere in the vicinity. Anyone know what this is? It is located on the right side (passenger side for US car) in the frunk area under the carpet that I removed to access the front actuators. See pictures below - in the second picture I drew where the wire was because I have removed it.

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I was able to scrounge up an assistant and checked that all 4 actuators seem to go through their range of motion routine when turning ignition key to accessory position.

Would it be useful to drive the car a bit with the 4 actuators loose (not mounted onto the dampers) to make sure the issue is not there? What is the feedback loop from that initial self test rotation? Is the car simply looking for the actuators to be able to turn through their range or is there some secondary signal of damper function from somewhere else?

TIA!

 

If you cycle the ignition a few times without the car moving, it will throw a suspension fault. If you take the car for a drive and it goes out, that's all it was.

No idea on the cut wire but that looks like somebody added a ground (for something), and it could have been removed. Could have been anything, my guess would be a battery tender pig tail with the other end tied to the battery plus cable where the kill switch is.

 

Thanks Pete - but the fault showed up when on a normal drive and has been there ever since on at least a half dozen separate drives and none of those were just cycling the ignition without driving. I have since done the ignition cycle thing but that’s a diagnostic step to try to track down the issue after the problem surfaced.

Good thought on the wire - i imagine you are right!

 

Right next to that earth bolt, I believe is the suspension system brake pressure switch. You could do some resistance checks on it. I've been told that the no brake pressure resistance of the switch is 2.2k ohms. With the brake pushed, zero ohms.

The wire is not an earth for the brake pressure sensor as both wires go directly to the Suspension ECU.

 

When the actuators move during their power up test cycle, they are looking for the clockwise/anticlockwise endstops of the little cogs on top of the suspension struts. If they can't find the endstops, they will flag a fault.

 

OK thanks so no benefit to leaving them disconnected for a test drive. I reconnected them but have left all the carpet/covers off and am going to go for a drive on the offhand chance that taking them off and putting them back on somehow helped (unlikely)

 

I thought so too, until I discovered that I didn't reseat one of my actuators, properly

 

...well, it turns out that after putting them back together the fault is now gone!

So something got 'fixed' through manipulation. Odd as I was careful to verify they were correctly seated and well retained by the metal spring clips when I put them back together 3 months ago and I have had many drives since with no faults until this weekend.

I swear these cars have a mind (and moods) of their own...

Thanks for the help as always!