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Old 15-09-2018   #1
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Facelift door on pre facelift car

Iím fixing a 2014 Sport for a colleague which needs a new door. Her car is a pre facelift car and the door I have is a facelift one. The inside of the door is different and so is the wiring loom.

The door has a crash sensor on it which is wired into the loom and the apertures inside are different. The door card holes seem to all be in the same place so Iím hoping that if I use the old loom from the car that all the other internal wiring is the same so I can just take the crash sensor off. From what I can see the plugs are the same.

Does anyone know whether this will cause any issues?
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Old 15-09-2018   #2
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Re: Facelift door on pre facelift car

If her car is not expecting to find a crash sensor, and it is not connected, it should not create any issues.
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Old 16-09-2018   #3
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Re: Facelift door on pre facelift car

Quote Originally Posted by typecastboy View Post
Does anyone know whether this will cause any issues?
If anyone else had posted this question, you'd have been the first person I'd have asked .

Unless anyone else here has done what you're proposing, you'll be breaking ground on this one. Like PB, I'd have expected it to work, but you won't know for sure if there's a problem until you've transferred all the old trim and internal mechanisms into the new door shell. If you need a hole for a fixing that isn't there, then you can always drill one, but if you've got an aperture in the new door where you need to fix something, it won't be that simple.

Let us know how it goes.
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Old 16-09-2018   #4
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Facelift door on pre facelift car

I donít intend to change anything internally. The plugs all look the same except for the extra one for the crash sensor. I assume the newer cars donít have the crash sensor behind the seat belt reel but have it on the door instead.

The plug into the car is different too. Thereís not a length of cable that goes into the car to plug in, it appears it plugs directly in where door meets car. I will have to strip the loom out and replace it from the car one. The apertures in the New door look like thereís easier access to everything including the horrible job of changing the door handle.

Iíll do a little video when I do it.
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Old 16-09-2018   #5
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Re: Facelift door on pre facelift car

Does the door have a door ECU? You may find that this is also different.
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Old 16-09-2018   #6
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Re: Facelift door on pre facelift car

Quote Originally Posted by 306maxi View Post
Does the door have a door ECU? You may find that this is also different.


A door ECU? never heard of such a thing!
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Old 16-09-2018   #7
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Quote Originally Posted by typecastboy View Post
A door ECU? never heard of such a thing!
https://en.m.wikipedia.org/wiki/Door_control_unit

such a thing does exist, but to be fair youíre more likely to see them in something that has KESSY, electric folding mirrors, dimming mirrors, mood lighting on the door and so on.
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Old 16-09-2018   #8
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Facelift door on pre facelift car

Quote Originally Posted by 306maxi View Post
https://en.m.wikipedia.org/wiki/Door_control_unit



such a thing does exist, but to be fair youíre more likely to see them in something that has KESSY, electric folding mirrors, dimming mirrors, mood lighting on the door and so on.


Oh right, I see. No, Fiat 500s certainly donít have them. No ECU is shown in MES and thereís nothing within the door itself.
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Last edited by typecastboy; 16-09-2018 at 10:35.
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Old 16-09-2018   #9
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Re: Facelift door on pre facelift car

Itís a thing on newer and higher end cars tbh. But itíll come to lower end cars in time as people expect to get things like KESSY on cars at that end of the market.
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Old 16-09-2018   #10
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Re: Facelift door on pre facelift car

Quote Originally Posted by 306maxi View Post
Itís a thing on newer and higher end cars tbh. But itíll come to lower end cars in time as people expect to get things like KESSY on cars at that end of the market.


I imagine my 500x has got one. Itís still in the local garage having the abs/epb/esr problems sorted out before I do the bodywork.
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Old 16-09-2018   #11
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Quote Originally Posted by typecastboy View Post
I imagine my 500x has got one. Itís still in the local garage having the abs/epb/esr problems sorted out before I do the bodywork.
Would be surprised if it did tbh, itís a rather old platform.
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Old 16-09-2018   #12
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Re: Facelift door on pre facelift car

Quote Originally Posted by 306maxi View Post
Would be surprised if it did tbh, itís a rather old platform.


Is it? What, you mean Jeep? It has fold in mirrors etc.
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Old 16-09-2018   #13
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Quote Originally Posted by typecastboy View Post
Is it? What, you mean Jeep? It has fold in mirrors etc.
Ah, it has keyless entry, seems Fiat have moved into the 21st century! Suspect it might have them then.
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Old 16-09-2018   #14
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Re: Facelift door on pre facelift car

Quote Originally Posted by 306maxi View Post
Ah, it has keyless entry, seems Fiat have moved into the 21st century! Suspect it might have them then.


Yeah it seems much more technologically advanced and better screwed together than the 500.
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Old 17-09-2018   #15
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Re: Facelift door on pre facelift car

Quote Originally Posted by typecastboy View Post
The plug into the car is different too. Thereís not a length of cable that goes into the car to plug in, it appears it plugs directly in where door meets car. I will have to strip the loom out and replace it from the car one. The apertures in the New door look like thereís easier access to everything including the horrible job of changing the door handle.

Iíll do a little video when I do it.

I wonder if they've done this to prevent the opportunities for more wiring breakages? I've not known Fiat to have problems with wiring breaking in this area, but we all know about the boot wiring and I've known Vauxhalls and VW Group to have wiring breakages in the front door hinge area. Good to know they've made repair access easier too. Perhaps they are learning - the other bits of the 500 facelift (glovebox, useable cupholders) were also answers to criticisms of the earlier cars.


Quote Originally Posted by 306maxi View Post
Ah, it has keyless entry, seems Fiat have moved into the 21st century! Suspect it might have them then.

The 500x has loads of kit, albeit mostly as options - lane departure warning, AEB (to be fair even the Panda has that) keyless & capless refueling, keyless entry & start. With the latest facelift they've now added LED front lights - a first on any Fiat or Alfa, who've persisted with xenons until now, traffic sign recognition & auto dipping high beam. They seem to be using the 500x & Renegade to roll out a lot of this stuff - I don't think even the new Alfa Giulia or Stelvio have the traffic sign recognition and they definitely don't have LED front lights.


I think this is possibly why this otherwise dependable (but fairly dull to drive) platform exhibits some electronic failures in the 500x & little Jeep.
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