The warning came on about two years ago when the old battery was failing. Last Thursday in the queue to check in to a ferry there was a lot of long waits where I turned the engine off and then restarted and it came on, and has stayed on even after four days and about 550 miles of driving. The Ctec battery monitor is generally amber, was green after a few hours on a borrowed 4 amp battery charger but turned amber again very quickly. No voltmeter here to check voltage so I think its down to a weak battery. Has anyone had the same issue, and was it the battery or a real problem with the pedestrian system? I am now in deepest France and not back until 22nd. The car still starts first time.
Check Pedestrian System warning
Norman E
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Until the day you hit someone and your insurance is null and void.
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What Jimbo said. If it was the airbag light annoying you, would you disable the airbags? Or the same for seatbelts? I'd presume not, because they affects systems designed to protect the driver or passengers. The pedestrian protection system is designed to reduce the risk of fatality in a pedestrian impact (the clue is in the name!), wilfully defeating that on grounds of personal inconvenience or cost is the height of entitlement and arrogance.
If I had done this and then hit and killed a person - god forbid a child - knowing that potentially they'd have lived if the PPS system was working correctly I'm not sure I could live with myself. It worries me that there are those walk among us that apparently can.
I've never seen this warning light so i don't know if it would annoy me or not. What does annoy are the hundreds of idiots who ignore the 30 speed limit through our village. 50 or even 60 mph on a narrow country lane, no pavements or street lights with walkers, cyclists, horses, kids playing in the front garden etc all potential accidents waiting to happen. And of course, you can't get the police to come and do a speed check....
I had the PPS deploy on my XF when I hit a dead badger. It requires new hinges for the bonnet, new air bags and a new PPS module. AFAIK, the accelerometers don't need to be replaced.
The system is extremely robust and would not deploy just by hitting a pothole or speed bump. The bumper itself has to sustain the sudden shock.
Finally, I'm amazed to read that merely pulling the fuse "fools" and disables the PPS so that there is no warning message. When I investigated this possibility after my event and prior to the repair, I was informed it would need the CCF "adjusting".
There is a way to disable it but I will not reveal it here. It should not be disabled!
The system is extremely robust and would not deploy just by hitting a pothole or speed bump. The bumper itself has to sustain the sudden shock.
Finally, I'm amazed to read that merely pulling the fuse "fools" and disables the PPS so that there is no warning message. When I investigated this possibility after my event and prior to the repair, I was informed it would need the CCF "adjusting".
There is a way to disable it but I will not reveal it here. It should not be disabled!
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Other traffic moving too fast aside, the PPS is designed to reduce the likelihood of the other party being killed if you hit any of them in your car. I don't see why you would willingly modify your car in such a way that it becomes more dangerous to other road users. Have a word with yourself.
My understanding is that it is designed to stop the pedestrian's head coming into contact with the wipers and wiper studs as the come across the bonnet. This was mine after it deployed . .
![Image]()
The dashcam captured the moment the airbags fired. This is a still. The LH one is more obvious.
![Image]()
The vid is on YouTube if you're interested . .
The dashcam captured the moment the airbags fired. This is a still. The LH one is more obvious.
The vid is on YouTube if you're interested . .
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180 Posts
That may also be an effect, but I understood, primarily, it was to enable the design of the front of the car, bonnet etc to have a low profile. In the USA, there is a minimum gap required between the underneath of the bonnet and the solid lump of the engine - the PPS was a way to comply with this regulation but still keep the low design profile. The safety of the pedestrian would not be compromised because the bonnet lifts up to achieve the gap required in a split second after impact.
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From an old thread (2014) on this forum, https://www.jaguarforum.com/threads/anyone-bypassed-the-pedestrian-protection-system.75093/
Jaguar is one of the first manufacturers to meet Phase One of new European safety legislation using an active deployable bonnet system. The new standards are designed to help mitigate the severity of injuries to pedestrians in the event of a collision with a car. Legislation in the European market requires manufacturers to commit to a two-phase introduction of a range of active and passive safety improvements on all new cars to improve the protection of pedestrians in case of accident.
In the unfortunate event of a pedestrian impact, the deployable bonnet on the new XK automatically 'pops' up a few inches, to increase space between the engine and the bonnet. This helps to isolate the pedestrian from hard points in the engine compartment - and takes place in less than a tenth of the time it takes to blink an eye. An advanced sensing system is mounted in the front bumper to help discriminate between a pedestrian collision and any other possible front-end collisions.
"The Jaguar design team embraced the idea of using a deployable bonnet when it was first considered during early concept discussions on the new XK. This clever feature saves up to 65mm in height off the bonnet surface and a similar amount off the roofline, allowing the design team to maintain a very low, sleek Jaguar sports car profile on the new XK," said Ian Callum, Jaguar Cars Design Director.
I also have a copy of the official Jaguar Cars Press Pack from the launch of the facelifted 2011 model which includes the following,
As well as the convertible's hidden, automatic roll-over protection, every car in the XK range features Jaguar's pedestrian deployable bonnet system (not fitted to Federal market cars). In the event of a collision with a pedestrian, the system raises the bonnet by 170mm in just 30 milliseconds to provide a clear space between the surface of the bonnet and the hard points underneath, to reduce the severity of injuries - particularly those to the head - while still allowing the new XK low bonnet line. An energy-absorbing bumper system also helps minimise lower leg injuries to pedestrians.
I think this release was aimed at the US market and the reference to 'Federal market cars' may be to differentiate between Federal and State laws which are not always the same. Maybe someone can correct me if I'm wrong.
Anyway, the point is that this system was specifically designed to protect pedetrians in the event of impact and is not something that I would want to disable for any reason.
Jaguar is one of the first manufacturers to meet Phase One of new European safety legislation using an active deployable bonnet system. The new standards are designed to help mitigate the severity of injuries to pedestrians in the event of a collision with a car. Legislation in the European market requires manufacturers to commit to a two-phase introduction of a range of active and passive safety improvements on all new cars to improve the protection of pedestrians in case of accident.
In the unfortunate event of a pedestrian impact, the deployable bonnet on the new XK automatically 'pops' up a few inches, to increase space between the engine and the bonnet. This helps to isolate the pedestrian from hard points in the engine compartment - and takes place in less than a tenth of the time it takes to blink an eye. An advanced sensing system is mounted in the front bumper to help discriminate between a pedestrian collision and any other possible front-end collisions.
"The Jaguar design team embraced the idea of using a deployable bonnet when it was first considered during early concept discussions on the new XK. This clever feature saves up to 65mm in height off the bonnet surface and a similar amount off the roofline, allowing the design team to maintain a very low, sleek Jaguar sports car profile on the new XK," said Ian Callum, Jaguar Cars Design Director.
I also have a copy of the official Jaguar Cars Press Pack from the launch of the facelifted 2011 model which includes the following,
As well as the convertible's hidden, automatic roll-over protection, every car in the XK range features Jaguar's pedestrian deployable bonnet system (not fitted to Federal market cars). In the event of a collision with a pedestrian, the system raises the bonnet by 170mm in just 30 milliseconds to provide a clear space between the surface of the bonnet and the hard points underneath, to reduce the severity of injuries - particularly those to the head - while still allowing the new XK low bonnet line. An energy-absorbing bumper system also helps minimise lower leg injuries to pedestrians.
I think this release was aimed at the US market and the reference to 'Federal market cars' may be to differentiate between Federal and State laws which are not always the same. Maybe someone can correct me if I'm wrong.
Anyway, the point is that this system was specifically designed to protect pedetrians in the event of impact and is not something that I would want to disable for any reason.
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Exactly.
We are in central France so happy to help anyone in trouble - www.house-in-france.org.uk
It's definitely the case that on the 4.2 the lighter button does not do anything when pushed in apart from close the circuit and heat up the coil. The manual simply says "The cigar lighter is designed to be used just to heat the lighter element and not for providing a power source for accessories." It may well be designed for that but it can be used perfectly well for accessories.
Richard
I am discovering that the XK has a few weak spots including the water pump so now it looks like I need to sensors.
Just had my indy read the codes for my intermittent PPS warning & he's said all 3(?) show an open circuit which could mean a broken wire that feeds all of them so she's going back next week for the bumper off in order to investigate, I'll keep you updated
![:thumbup:]( ":thumbup:")
Not if it's intermittent.
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Excellent news and thanks for the update.Now had both sensors replaced at £112.51 each & £70 labour at my local indy
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