jag technology
Discussion
My '99 s type was in for a service yesterday. I asked them to investigate a message that kept flashing up on the computer. FAIL SAFE MODE appeared regularly and after basic investigation (oil+ water) asked the dealer ton look at this.
I received a call to say they had found the problem and it would require a new throttle pedal?! Apparently, there is an electronic sensor in the pedal linked to the computer. I asked if not replacing would affect performance, and the reply was that it would not affect the fuelling however the flashing message would continue.
So, £250 for a new pedal later, my question is...has technology gone too far? On the face of it the sensor is a gimmick, linked to not only the computer but to the dealers bank account. Has anybody else come across this problem, and does anyone on here actually know what the true purpose of this sensor is?
I received a call to say they had found the problem and it would require a new throttle pedal?! Apparently, there is an electronic sensor in the pedal linked to the computer. I asked if not replacing would affect performance, and the reply was that it would not affect the fuelling however the flashing message would continue.
So, £250 for a new pedal later, my question is...has technology gone too far? On the face of it the sensor is a gimmick, linked to not only the computer but to the dealers bank account. Has anybody else come across this problem, and does anyone on here actually know what the true purpose of this sensor is?
Hi,
The S-Type range does not have a conventional cable operated throttle, the pedal is linked to the cars engine managment unit which in turn sends a signal to the electronic throttle. They do quite often play up but it's a ten minute job to replace the pedal (held in place with two 10mm nuts) so depending on the price of the part £250 seems a little expensive, even clearing the fault codes only takes a few minutes?
The S-Type range does not have a conventional cable operated throttle, the pedal is linked to the cars engine managment unit which in turn sends a signal to the electronic throttle. They do quite often play up but it's a ten minute job to replace the pedal (held in place with two 10mm nuts) so depending on the price of the part £250 seems a little expensive, even clearing the fault codes only takes a few minutes?
a8hex said:
Are these things fly by wire?
Does this sensor actually tell the computer how much you would like the accelerator openned so that it can have a bit of a think and decide whether it agrees with you before asking some servo to actual open the throttle...etc.
Does this sensor actually tell the computer how much you would like the accelerator openned so that it can have a bit of a think and decide whether it agrees with you before asking some servo to actual open the throttle...etc.
Pretty much.
The main benefit is that you can add features that improve driveability to prevent jerkiness, control idle better, improve emissions when you lift off and help with clutch modulation.
GavinPearson said:
a8hex said:
Are these things fly by wire?
Does this sensor actually tell the computer how much you would like the accelerator openned so that it can have a bit of a think and decide whether it agrees with you before asking some servo to actual open the throttle...etc.
Does this sensor actually tell the computer how much you would like the accelerator openned so that it can have a bit of a think and decide whether it agrees with you before asking some servo to actual open the throttle...etc.
Pretty much.
The main benefit is that you can add features that improve driveability to prevent jerkiness, control idle better, improve emissions when you lift off and help with clutch modulation.
I know why they do it that way, and it most cases it's a good thing, I don't know what the reaction speed of the Jag system is like, I know I saw a letter in a Car mag recently where someone was complaining that their new BMW had taken upto about 1s to react at times which drove him potty, potty to the extent he ended up selling it.
One of the things I like about my old Jag is that it does feel really connected to the driver. When I do something it reacts, when occassionally I do things right it feels great, when I f
up, I know I fd up. On the other hand I don't normally drive it to get from A to B, I drive her because I want to drive. I can't say I've noticed to much delay on my X300. The wife's MB diesel on the other doesn't feel connected, so it rarely feels like you got things right, then it hardly ever leaves you with the feeling that you f
d up. You get no lows, but then you never get any highs either. It;s the safe option. Gassing Station | Jaguar | Top of Page | What's New | My Stuff