Hi All,
Recently I have been getting intermittent message my "Pedestrian protection system" needs checking and a triangular warning comes up on dash. (didn't know I had such a thing). It first came up when I was on a long country run and when I stopped I checked the front of car. There was a big dragonfly stuck to one of the sensors, I flicked it off and that seemed to work. BUT it has come back.
Any ideas?

TIA
Hugh
.

 

Pedestrian Protection System (PPS) also known as 'deployable bonnet' is fitted to European specification vehicles. Although Australia is also RHD, I didn't know it was was also fitted to Australian specification.

The most frequent cause of the fault is a failed impact sensor behind the front bumper. Other Jaguar models (such as the XK) have two spearate sensors but the X260 has a single sensor running across the front:





On my last XK, when I had the same fault, the warning message could be cleared a maximum of 99 times then became permanent. The X260 is likely to have a similar 'count'. Replacing the sensor did not require programming.

Graham

 

All three of my Jags (2010 XFS, 2010 XFR and 2014 F-Type) had/have that damnable PPS so it seems all Oz Jags had the same set-up as Blighty Jags and Hugh's X260 has it for sure.
Real easy to check if your Jag has it, just open the bonnet and take a squiz in the rear corners of the engine bay up by the windscreen, if fitted the airbag gubbins stick out like the proverbials.

 

AHAHA. thanks all.

 

Hey, but WAAAAIIT!
Have mercy, you can't talk about such an intriguing thing,... resolve it in a flash, and leave the rest of us hanging on your every word:

What IS a deployable bonnet? I mean, what does it do to protect pedestrians? During what kind of impact?
Our US models don't have it, as far as I am aware.

 

As far as I know, in the event of a collision crumple zones are activated and the Bonnet (Hood) is pushed up and back.

cheers

 

I should have done a search. There are plenty of posts already but not for x260.
Anyway, here is the actuator


Are those little round sensors on front bumper for parking? If so then you cant see where the PPS is from the outside. From your diagram above it looks like they are below the headlight.

 

From my copy of the F-Type Workshop Manual:

PEDESTRIAN PROTECTION SYSTEM
The bumper includes sensors that detect a
collision with a pedestrian and includes energy
absorbing foam and plastics in its construction,
to reduce leg injuries.
During a pedestrian collision, the sensors
initiate a bonnet deployment system that
releases the bonnet latches and raises the rear
edge of the bonnet by approximately 130 mm
(5.1 inches).
This increases the gap between the bonnet and
the components within the engine compartment
to create a cushion to mitigate injury caused to
the pedestrian.
The bonnet deployment system is active only
when the ignition is on and the vehicle is driven
between the speeds of approximately 20 km/h
(12 mph) and 50 km/h (31 mph).

All modern Jags have it, from at least 2008 when the XF came out and possibly earlier, and they all work the same way as spelled out above.
They use the weasel words "bonnet deployment system" but what they really mean is a pair of explosive airbags which, when they go off, shear the bonnet locks or hinges and blow the rear edge of the bonnet up in the air. Of course this destroys the bonnet and the locks (F-Type, XK) or hinges (XF, XJ, F-Pace etc) and the airbags have to be replaced so not a cheap fix.
Many reports over on the Pommy forum of false deployment of this system, eg no collision at all let alone with a pedestrian, instead a minor bump from a speed bump or a pot hole etc. But I have never read or heard a single report of a pedestrian being "saved" or at least their injuries reduced by this system.
You Muricans are very lucky not to have been lumbered with this worse than useless system!

 

YES - the round visible ones will be front parking sensors. The PPS sensor will be hidden behind the front bumper.

Graham

 

RELAX and be THANKFUL this abomination is NOT fitted to US specification vehicles.

Graham

 

I understand we can thank the EU for imposing this PPS system by law on all cars sold into the European market, unless they have a quite large gap between the top of the engine and the underside of the bonnet. Such a large gap would of course ruin the lines of most cars (and probably adversely affect the aerodynamics) so the PPS system has to be fitted.

 

Here it is. RH one I can see, not easily. I could probably access it from below after removing covers.


Thats it top right, just next to headlight washer. Looks like original model. It seems there is a reliability issue with these. There is a version 2 with singe bolt.

 

Correction, version 2 with single bolt appears to be for a different model.
I think the Jaguar Part Number is ;T4N3601
Number on the sensor; GX7314B750AB.

 

It seems they come as a pair connected by tubing. I imagine they are replaced together as an assembly. Makes replacement more tricky.

 

Hugh,
Before throwing money at new parts and probably a lot of messy and/or expensive labour I reckon you should get a code reader on it.
Probably won't show any more than what the error message already says but who knows.
Plenty of decent code readers out there for not a lot of $ and IMHO they are an essential diagnostic tool on a modern Jag, I know mine has saved me squillions.
I use an ICarsoft LR V2 but for a few more $ you can get an even better ICarsoft LR V3.

 

Thanks, I do have a little cheap OBD2 code reader that my son has borrowed so I will give that a go. It might identify if the left or right or both is faulty.
Incidentally car was fine today. Heat issue maybe?
I did speak to Solitaire today and as soon as I mention the fault they just said "oh that" then offered diagnostics at $220/hr.

Do you think I would need to replace both with the tubing or could one be replaced. Tubing is only held on with cable ties. I imagine they are pressure transducers and the tubing allows a differential measurement indicating a collision on one or other side.

 

Steer clear of Solitaire they charge like a wounded bull and their service is ordinary. Like all JLR dealerships these days they would not even bother to try to properly diagnose the problem (if there even is one), all they do is read codes and then throw new parts at the car and charge you a small fortune for the privilege.
I suggest you let it go for a while and see if the message comes back. If it stays away problem solved, if it comes back then maybe just let it go and keep clearing the message, it's only the useless PPS anyway. I know nothing about replacing those parts so I can't help you there.
If the message comes back and you really want to get it fixed I suggest you try Triumph Rover Spares, they are Jag and Land Rover specialists, I have used them a few times and their mechanics know what they are doing and their prices are reasonable, way less than what Solitaire would charge, see here: https://triumphroverspares.com.au
A bit of a hike down to Lonsdale but worth it in my opinion.

 

Well no faults yesterday. looks like temperature dependant. If that's true I should see more faults this coming week as it gets warmer.
It seems there are multiple instances of the system being deployed WITHOUT a collision. You would think this is a jaguar design flaw but it seems no one has had any luck getting them to admit liability even when it is still under warranty.
Here's hoping that doesn't happen and it is only an erroneous sensor indication.
Thanks Kim for good info.

 

Purely by accident (terrible pun not intended) I gave the false PPS deployment a test on my F-Type yesterday.
Pulling into the local shopping centre carpark and got blocked and hemmed in by masses of muppets going nowhere and just staring at each other as some of them very poorly attempted to reverse in or out of the tight parking spaces.
Eventually got a small gap so I turned hard left but it turns out I turned a little too hard and the left rear wheel rode up the corner of the kerb and crashed down to earth on the other side with an almighty thump.
It wasn't until I revisited this thread I thought "Jeez, that thump could have been enough to trigger the PPS but luckily it didn't".
I now realize that it didn't go bang because I was going real slow, well under the 20 km/h per the Manual.

 

Hugh,
I forgot to add, you can get the PPS disabled if you are worried about false deployment, it simply requires a tweak of the CCF (Car Configuration File) using SDD.
I had this done on both my XFS and XFR but I never bothered to do it on the F-Type as it seems that JLR fixed the over-sensitivity for the F-Type. Dunno about the X260 but I suspect it was fixed for that as well, seeing as the X260 came out two years after the F-Type, and I can't recall reading of a single false deployment on either the F-Type or X260.
No JLR dealership will do it but an independent with SDD just might.