Technical Found Alarm Wiring Loom!

[Rich]

Ok, it appears I'm taking crap, well, a bit of crap mixed in!

From what eLEARN tells me, the alarm control module is INTEGRATED into the body computer. Since there is no difference between body computers for Stilo's with alarm from the factory or without, one assumes it's either in all body computers and not switched on, or just a software program that's activated or not as the case may be.

The siren and header console are NOT connected to the CAN network; they appear to be on the Serial line, hence aren't active nodes at all, just components.

One thing to try; is the fuse for the alarm in? If not, whack one in; it may be as simple as that (although I doubt it!)

 

[Argonought]

Good thought about the fuse but they're all in place

Is that socket at the top (on the body computer at the back) the place that Examiner is connected and if not what do you think it's for?


Just been reading some fault procedures on eLearn and it mentions that if you can't configure the alarm with Examiner then the siren may be disconnected. It wasn't connected the last time it was hooked up so perhaps there's still a chance :idea:

 

[Rich]

Yeah thats the socket for the Examiner and all OBD-II complaint testers.

Thats strange, from what you've written it would imply that the siren is in fact a node, whereas eLEARN on it's Description section says it's not

 

[Argonought]

What I can't grasp is the communication principle. I can understand the CAN network utilizing 2 wires (high & low) but how can the body computer talk to the siren via 3 wires if 2 of those are supply lines.

Is it not just a hold off line (as in conventional house alarms) or can the body computer transmit data (dis-arm code) to the siren.

This sounds way over the top for a car alarm - more like technology for a self-destruct device on a countdown timer

 

[Rich]

Yeah, it's not on the main CAN line, from what eLEARN says it's just on a separate Serial line.

Simple thing again; the siren connector, is it getting +12V feed? As in, have you verified it with a multimeter??

 

[Argonought]

As in, have you verified it with a multimeter??

Was afraid you might suggest something like that :bang:

Pretty sure it's OK but you're quite right I should've checked before replacing the scuttle cover for the 2nd time

Fancy giving any clues as to where I might find D97A (interestingly described as "short circuit coupling") ?

 

[Rich]

Well between the times of me collapsing asleep and now, I've lost my eLEARN CD! I'll go hunting later . . .

 

[Argonought]

Know exactly what you mean - nearly dozed off myself - and got footie later.

Mind you - thought of taking scuttle cover off perked me up a bit

 

[Rich]

thought of taking scuttle cover off perked me up a bit

You're insane!!!

 

[Argonought]

Actually worst part is having to order 3 new clips to replace those you break every time you take it off (and then waiting 4 days for the order to come in).

Getting quite good at fitting it now. At main agents the other day and 2 out of 4 Stilo's in car park didn't have it fitted properly (not sure if that was down to the garage or the owners)

Be a good time to look at eLEARN in the next 90 minutes

 

[Rich]

Do you mean the seal to the windscreen? When I replaced one I found it hard to get it back into place.

And now that it's half time I'll go eLEARN searching

 

[Argonought]

Blimey! That was a bit stressful! Felt sorry for the team. Thought they deserved to win!

Yep, The big plastic thing that covers up the wiper motor and stuff - do you not call that the "scuttle cover" - I can tell you it's a lot easier to fit the 2nd time around.

 

[Rich]

Yeah, it's the bit of the scuttle plate where it sits on the windscreen; I replaced the one on mum's Stilo, had trouble getting it to sit tight onto the windscreen without there being a gap - that was the "seal to the windscreen" I was referring to

 

[Argonought]

Mine didn't look too good on the first fitting either

On the 2nd attempt I checked it out more carefully:

1. Bend the ends 'down' to compensate for stress they go through on removal.
2. Locate center pin and while holding plate under windscreen, pop clip into middle hole.
3. Now the do the same for left and right side and push in a clip when it's in position.

It's very important to try to push the plate under the windscreen and if you do it right then you should hear a pop as it clicks into place. It's also critical to have a clip ready as otherwise it's likely to pop out again when you let go.

So why did you have to change the scuttle plate in the first place and how did you get on with removing the wiper arms

 

[Argonought]

OK, back on topic...

I was hoping a 'short circuit coupling' might provide any easy way to check out the wiring loom but from what I can see it's stuck way up behind the dashboard and you'd need to be a contortionist to access it

Pulled a few fuses out and killed power to the header console (main alarm module) so looks to me that it's safe to assume everything is wired OK

Still think best chance is to see if Examiner can now see any options made available to it, by addition of siren, to activate alarm.

Not too keen on spending another £40 just to find that it can’t see anything so looks like it will have to wait until the Stilo has to go in for something serious (best not tempt fate )

 

[Rich]

Funnily enough I also need to find D97 now, will see if it's easy tomorrow, although I very much doubt it!

 

[Argonought]

Re: Factory fitted alarm - UPDATE

Finally managed to get hooked up to Examiner for nearly an hour.

I explained to the tech exactly what I’d done and he seemed quite enthusiastic about sorting out the body computer to accept the factory alarm I’d fitted.

...but one hour later he’d given up!

He went through just about every single option on Examiner but nothing could persuade it to see any faults with the alarm installation (the idea being that if Examiner reports a fault then it follows that it can see the alarm). The only thing it consistently reported was “OPTION NOT AVAILABLE” (or similar message).

The tech finally asked Examiner to interrogate the BC itself and this produced the interesting result.

Alarm: Inhibited

It seems very clear that the BC on my Stilo cannot support an alarm and that basically is the end of it.

The tech finally made a request to Fiat for a Body Computer with Alarm Option installed. The problem is there’s no such option :bang: You can request a replacement BC (identical to the one I already have) or order a brand new Stilo with the alarm option and that’s it.

The tech and I were both stunned. Despite most Stilos having a full wiring loom which would fully support the factory fitted alarm and the fact that all add-on items can be freely purchased it seems that a decision was made quite early that the Alarm could ONLY ever be installed during production. A different BC being fitted which is security locked into the body of the car - thus making any lucrative after-market sales effectively impossible.

I suppose I shouldn’t be too surprised at the outcome as at least one dealer suggested this was the case and of course it also explains why Fiat sell an after market alarm which is quite different (and in my view inferior) to the factory fitted version.

As far as my Stilo goes I intend to leave it as it is. Mine has all the stickers and it’s impossible to tell the difference between it and a Stilo with the factory fitted alarm (even all the switches light up). The only minor detail being that the alarm doesn’t work at all

So it anyone else wants to try all this then here’s your answer - DON’T

 

[PNL]

Re: Factory fitted alarm - UPDATE

Finally managed to get hooked up to Examiner for nearly an hour.

I explained to the tech exactly what I’d done and he seemed quite enthusiastic about sorting out the body computer to accept the factory alarm I’d fitted.

...but one hour later he’d given up!

He went through just about every single option on Examiner but nothing could persuade it to see any faults with the alarm installation (the idea being that if Examiner reports a fault then it follows that it can see the alarm). The only thing it consistently reported was “OPTION NOT AVAILABLE” (or similar message).

The tech finally asked Examiner to interrogate the BC itself and this produced the interesting result.

Alarm: Inhibited

It seems very clear that the BC on my Stilo cannot support an alarm and that basically is the end of it.

The tech finally made a request to Fiat for a Body Computer with Alarm Option installed. The problem is there’s no such option :bang: You can request a replacement BC (identical to the one I already have) or order a brand new Stilo with the alarm option and that’s it.

The tech and I were both stunned. Despite most Stilos having a full wiring loom which would fully support the factory fitted alarm and the fact that all add-on items can be freely purchased it seems that a decision was made quite early that the Alarm could ONLY ever be installed during production. A different BC being fitted which is security locked into the body of the car - thus making any lucrative after-market sales effectively impossible.

I suppose I shouldn’t be too surprised at the outcome as at least one dealer suggested this was the case and of course it also explains why Fiat sell an after market alarm which is quite different (and in my view inferior) to the factory fitted version.

As far as my Stilo goes I intend to leave it as it is. Mine has all the stickers and it’s impossible to tell the difference between it and a Stilo with the factory fitted alarm (even all the switches light up). The only minor detail being that the alarm doesn’t work at all

So it anyone else wants to try all this then here’s your answer - DON’T

Nows the time then to fit that fiat compatable alarm system I linked to you

 

[Argonought]

Re: Factory fitted alarm - UPDATE

Nows the time then to fit that fiat compatable alarm system I linked to you

Absolutely NO WAY!

I'm through with alarms now and everything is staying as it is

 

[Deckchair5]

Has anyone ever had their Stilo actually stolen?
As for breaking into one, am i being too cruel with a can of Mace pepper spray on the dash wired up to blipper controlled pressure sensor on the driver's seat?
Cheap, effective and so much more fun
click here
You almost want to leave the doors unlocked