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Car Forum / Chevrolet / Chevrolet Corvette / September 2005Tire Pressure Monitor
I have a 2004 Cadillac CTS-V (w/ Corvette Z06 LS-6 engine). Recently, I had my tires rotated, and now the display for the tire pressure is wrong. It reports the pressure for the back tires as the front tires. The Cadillac dealer wants $15 to "recalibate" the system, but I'd like to do myself. I believe this system is identical to the one of the Corvette. Does anyone know how to recalibrate the tire pressure monitoring system? Thanks in advacne. >I have a 2004 Cadillac CTS-V (w/ Corvette Z06 LS-6 engine). Recently, I had >my tires rotated, and now the display for the tire pressure is wrong. It [quoted text clipped - 3 lines] >know how to recalibrate the tire pressure monitoring system? Thanks in >advacne. does it say how to do this in your owners manual? Luke I may be a dummy here but aren't the front and rear tires a different size and shouldn't be rotated? >I have a 2004 Cadillac CTS-V (w/ Corvette Z06 LS-6 engine). Recently, I had >my tires rotated, and now the display for the tire pressure is wrong. It [quoted text clipped - 3 lines] >know how to recalibrate the tire pressure monitoring system? Thanks in >advacne. > Luke I may be a dummy here but aren't the front and rear tires a different > size and shouldn't be rotated? Just checked the Cadillac website and it appears all the wheels are the same size. Here's a website I found on reprogramming your wheel pressure sensors. -Bruce Bruce, thanks for clearing that up, got lazy and didn't reasearch ,it I assume you mean the tires as well are the same size. >> Luke I may be a dummy here but aren't the front and rear tires a >> different size and shouldn't be rotated? [quoted text clipped - 5 lines] > > -Bruce > Bruce, thanks for clearing that up, got lazy and didn't reasearch ,it I > assume you mean the tires as well are the same size. [quoted text clipped - 8 lines] >> >> -Bruce Yeah, that is correct. Tires and wheels are the same, didn't mention any different offsets. Here's the link, by the way.. duh.. http://www.hunter.com/pub/undercar/TECHLINK/ > > Bruce, thanks for clearing that up, got lazy and didn't reasearch ,it I > > assume you mean the tires as well are the same size. [quoted text clipped - 15 lines] > > http://www.hunter.com/pub/undercar/TECHLINK/ Nice information, Bruce; I'd never seen exactly how they work, altho' I've bought & sold quite a few that had them--even had a couple of sets of tires replaced on 'vettes using the system. Thx, s Bruce, Thanks for your help, but the website link didn't show up. Could you repost please? Thanks. >> Luke I may be a dummy here but aren't the front and rear tires a >> different size and shouldn't be rotated? [quoted text clipped - 5 lines] > > -Bruce >I have a 2004 Cadillac CTS-V (w/ Corvette Z06 LS-6 engine). Recently, I had >my tires rotated, and now the display for the tire pressure is wrong. It [quoted text clipped - 3 lines] >know how to recalibrate the tire pressure monitoring system? Thanks in >advacne. Here's the scoop... the main item you need to re-calibrate (actually it's "program the sensors" in the service manual lingo) the sensors is a magnet to engage sensors during the training sequence. The GM tool is J 41760, but maybe a decent powered magnet with a horseshoe shape or hole in it would suffice??? I use 2 stick magnets in the shape of a "V" and just set it over the stem. Make sure vehicle has been stationary for at least 2 minutes. 1 - Ignition on 2 - Press RESET to clear all IPC messages from DIC 3 - Press and release OPTIONS, scroll til IPC is blank 4 - Press and hold DIC RESET for 3 seconds 5 - Press OPTIONS again until TIRE TRAINING message is displayed 6 - Press RESET until IPC LEARN L FRONT TIRE to begin programming 7 - Install J 41760 over left front valve stem (I guess you could try a hefty magnet now) 8 - The horn will sound indicating LF sensor is programmed Notice - if after 15 seconds the horn doesn't sound, remove and reinstall tool on stem. This may have to be done up to three times in some instances. 9 - IPC will direct you to LEARN R FRONT TIRE, R REAR TIRE, then L REAR TIRE. Programming Cancellation: 1. Programming mode will cancel if any of the following conditions are met: - program mode exited through DIC - ignition turned off - all four sensors programmed - TPM program mode for 2 minutes with no sensors learned 2. If cancelled with less than 4 codes stored, the receiver will only accept the codes programmed up to that point. There you have it, good luck. Nice to have that Cadillac powered correctly.  SignatureDad 05 C6 Silver/Red 6spd Z51 72 Shark Black/Black/4spd Thanks for the instructions, but I'm not exactly sure what the IPC and DIC are. I assume I need some kind of hand held scan tool in addition to the magnet? >>I have a 2004 Cadillac CTS-V (w/ Corvette Z06 LS-6 engine). Recently, I >>had my tires rotated, and now the display for the tire pressure is wrong. [quoted text clipped - 65 lines] > > Nice to have that Cadillac powered correctly. Should be in your owner's manual. If you don't have the manual do a search on the web. I've done it with a magnet on my Corvette but you have to know how to get to it in the computer options on your dashboard first. > I have a 2004 Cadillac CTS-V (w/ Corvette Z06 LS-6 engine). Recently, I had > my tires rotated, and now the display for the tire pressure is wrong. It [quoted text clipped - 3 lines] > know how to recalibrate the tire pressure monitoring system? Thanks in > advacne. You must have a real low life money hungry moron for a dealer. We've had the very same thing happen twice. When we went back to the dealer the service greeter appologized profusely. He then got some kind of a little hand held device and within two minutes had them all back in sync. We're I you, I'd do a couple of things. 1) If you get a form from the folks who do polls on service satisfaction, fill it out and rip your dealer apart. 2) I'd call Cadillac directly, 1 800 458 8006 or if you're in Canada the number is 1 800 263 3777 ( for French speaking it's 1 800 263 7854 ) Your expereince is simply unacceptable. > You must have a real low life money hungry moron for a dealer. We've > had the very same thing happen twice. When we went back to the dealer [quoted text clipped - 12 lines] > > Your expereince is simply unacceptable. I was under the impression that the dealer didn't do the tire rotation. > You must have a real low life money hungry moron for a dealer. We've > had the very same thing happen twice. When we went back to the dealer > the service greeter appologized profusely. He then got some kind of a > little hand held device and within two minutes had them all back in > sync. You might be right if the dealer had performed the rotation, at our dealership, resetting the tire pressure monitor is part of the rotation, but we do charge extra. If the op got the tires rotated somewhere, why on earth should a dealership have to recalibrate his TPM for free? Ian My Cadillac dealer doesn't do rotations or tire repair. We have a local tire dealer, Les Schwab's who fixes flats and rotates wheels for free. When I get my wheels rotated, my next stop is the Cadillac dealer who reprograms the pressure monitors for free. I'm a 20 customer with this dealer. 'Don't know if this makes a difference. SignatureDon Vancouver, USA >> You must have a real low life money hungry moron for a dealer. We've >> had the very same thing happen twice. When we went back to the dealer [quoted text clipped - 9 lines] > > Ian > My Cadillac dealer doesn't do rotations or tire repair. We have a > local tire dealer, Les Schwab's who fixes flats and rotates wheels > for free. When I get my wheels rotated, my next stop is the Cadillac > dealer who reprograms the pressure monitors for free. Can't be much of a Cadillac dealer if they don't do rotations or tire repairs. We are a Cadillac dealer and we do "everything" on Cadillacs. We don't send a Cadillac anywhere for anything. In your case, they probably have a deal with the tire dealer to do that work, and as such they will reprogram the monitors for free. All that work is usually done under the Cadillac warranty anyway. Totally different scenario from what I was talking about. Ian Nope, on the deal with the tire company. They rotate and repair anyone's car for free. The dealer probably figures there isn't any money in rotations and tire repair. Anyway, it works for are locale. SignatureDon Vancouver, USA >> My Cadillac dealer doesn't do rotations or tire repair. We have a >> local tire dealer, Les Schwab's who fixes flats and rotates wheels [quoted text clipped - 10 lines] > > Ian >>My Cadillac dealer doesn't do rotations or tire repair. We have a >>local tire dealer, Les Schwab's who fixes flats and rotates wheels [quoted text clipped - 10 lines] > > Ian Our Cadillac dealer recently closed down frame, body & paint and converted the square footage into additional service bays for lube, drive train, suspension and brakes. They hand out a list of "referral" body shops. Tire rotation during a lube job used add $18. This last time it was $31. The sensor recal is part of the job. Our Chevy dealer now sublets all Corvette body and paint and 'stands by' (whatever that means) the work done by the sublet. Service advisors at both dealerships complain that there is too much "dead time" waiting for body parts, for paint to dry etc. The profit per square foot (and I assume service advisor commission) is better with the jobs they've kept. Both dealerships are cramped for service space and parking space. PJ Why? Simply because it's a Cadillac >> You must have a real low life money hungry moron for a dealer. We've >> had the very same thing happen twice. When we went back to the dealer [quoted text clipped - 9 lines] > >Ian > Why? Simply because it's a Cadillac Typical Cadillac attitude. "I bought a Cadillac, therefore everything must be done for free, forever and ever.....amen!" We deal with those types of customers all day long unfortunately. Of course, the tiniest leak that "must" be fixed under warranty is quickly ignored when the Cadillac owner becomes responsible for it. As is everything else. Ian "shiden_kai" <v-l-m@hotmail.com> wrote in news:dcVNe.75780$vj.25597 @pd7tw1no: >> Why? Simply because it's a Cadillac > [quoted text clipped - 9 lines] > > Ian nodding in agreement...simular to many vette owners that ive dealt with that feel they must be 1st in line no matter when they drive in. always was entertaining! not a cut to cadi owners but the line has been kinda pushed to middle class of luxury cars with the onslaught of asian lux. cars....it was nice to see them come out with a p/u tho. helps keep lincoln honest.......AIMHO, kjun Since I started this debate, here's my 2 cents. The dealer in question has done all waranty work, maintance, and repairs on both my CTS and Escalade. This amounts to thousands of dollars in revenue over the past few years. I don't have the attitude that everything should be free; the dealer's in business (like me) to make money and I have no problem paying for labor and parts. However, as previous posts prove, this is a simple 2 minute job that doesn't require any parts. Considering how much business they had from me, 2 minutes of a tech's time, without charge, seems to be a reasonable request. > "shiden_kai" <v-l-m@hotmail.com> wrote in news:dcVNe.75780$vj.25597 > @pd7tw1no: [quoted text clipped - 20 lines] > was nice to see them come out with a p/u tho. helps keep lincoln > honest.......AIMHO, kjun Of course it is Luke.. I was the Assistant Service Manager for Mitchell Motors Cadlliac for a few years, and if I heard that from one of my Service Writers, he would of gotten reprimanded. In my experience Cadlliac owners in general are very loyal to their Dealerships for the desirable Customer Pay jobs if the warranty work period was satisfactory... Now I don't know about the new customer base sport sedan owners and Lux SUV's. But the Joe that owned a Coupe/Sedan DeVille, Eldorado was very very loyal if they got treated right under the warranty period. > Considering how much business they had from me, 2 >minutes of a tech's time, without charge, seems to be a reasonable request. [quoted text clipped - 35 lines] > > SignatureRic Seyler Online Racing: RicSeyler GPL Handicap 6.35 ricseyler@SPAMgulf.net http://www.pcola.gulf.net/~ricseyler remove -SPAM- from email address -------------------------------------- "Homer no function beer well without." - H.J. Simpson If the op got the tires rotated somewhere, > why on earth should a dealership have to recalibrate his TPM for > free? Because they might want to sell me another car? Oh I forgot, they don't make any money selling the things -- just servicing them. I'm convinced GM deliberately designs systems so complicated they can force you to come back to dealers to have them serviced. Owners can't even perform routine maintenance anymore because it requires special tools or filters/parts available only at the dealer. Really disgusting and one reason I've stopped having anything done except an occasional oil change because I don't keep the things past warranty anyhow. > If the op got the tires rotated somewhere, >> why on earth should a dealership have to recalibrate his TPM for [quoted text clipped - 10 lines] >occasional oil change because I don't keep the things past >warranty anyhow. Are you serious? That's not true in the least. -- lab~rat >:-) Do you want polite or do you want sincere? >> If the op got the tires rotated somewhere, >> why on earth should a dealership have to recalibrate his TPM for >> free? > Because they might want to sell me another car? Oh I forgot, > they don't make any money selling the things -- just > servicing them. Right! That's certainly what we do at our dealership...hang around waiting for do things for free so "you might" buy another car. People like you won't be happy anywhere anyways....so you might just as well bugger off. > I'm convinced GM deliberately designs systems so complicated > they can force you to come back to dealers to have them [quoted text clipped - 4 lines] > occasional oil change because I don't keep the things past > warranty anyhow. How very ethical of you! Just pass your un-maintained vehicle onto the next poor shmuck eh? Ian Humm, and what "routine maintenance" requiring special tools are you talking about? Oil change? Nope. Air filter check? Nope. Bet you haven't even read the owners manual. What a yutz! > If the op got the tires rotated somewhere, > [quoted text clipped - 9 lines] > and one reason I've stopped having anything done except an occasional > oil change because I don't keep the things past warranty anyhow. Hey guys. People in here have been voicing their opinions and disagreeing for a long, long time without having to call each other names. It's been pretty nice that way. > Humm, and what "routine maintenance" requiring special tools are you > talking about? Oil change? Nope. Air filter check? Nope. Bet you haven't [quoted text clipped - 13 lines] > > and one reason I've stopped having anything done except an occasional > > oil change because I don't keep the things past warranty anyhow. > Hey guys. People in here have been voicing their opinions and > disagreeing for a long, long time without having to call each other > names. It's been pretty nice that way. Yutz? That's fairly tame in the newsgroups. Of course, maybe you own the newsgroup that you are talking from and have your own set of rules. Ian > > Hey guys. People in here have been voicing their opinions and > > disagreeing for a long, long time without having to call each other [quoted text clipped - 5 lines] > > Ian Whatever you're used to Ian. Any name calling is pretty sophomoric. Most of us just yak about Corvettes, and I guess occasionally get under someone's saddle with something about a Cadillac, which I think is what upset you. People come an go, but yes, this is a pretty civil group. Hope you enjoy it since it is usually much different than many others. > Whatever you're used to Ian. Any name calling is pretty sophomoric. > Most of us just yak about Corvettes, and I guess occasionally get > under someone's saddle with something about a Cadillac, which I think > is what upset you. People come an go, but yes, this is a pretty civil > group. Hope you enjoy it since it is usually much different than > many others. I didn't respond with the "yutz" comment, was more just responding to your response. Usually, the only thing that gets my goat is the enormous number of people that imagine far more items on their cars ought to be repaired for free. I'm only here because of the cross posts. Guess I'll trim out the Corvette group. Nice cars, but I have to work on the things during the day, so it's just another car to me. Though I did just take an 06 ragtop out for a spin yesterday.....I really...really...like the new Corvettes. They look better, drive better, feel better....and did I mention they look better? Unfortunately, GM has managed to make them even more difficult to work on. We have one (06) in the shop getting something done to the left fuel tank sending unit. The whole rear drivetrain has to come out, just to get the fuel tank in and out. Oh well, winter is coming and we usually don't see the Corvettes until spring and summer. Ian > I'm only here because of the cross posts. Guess I'll trim out the > Corvette group. Nice cars, but I have to work on the things during [quoted text clipped - 9 lines] > > Ian Strange, how many 06 Corvettes does your dealer have? I didn't think they were on the road yet???? SignatureDad 05 C6 Silver/Red 6spd Z51 72 Shark Black/Black/4spd =- - - - - - - snip ----------- > I didn't respond with the "yutz" comment, was more just responding > to your response. Usually, the only thing that gets my goat is the > enormous number of people that imagine far more items on their > cars ought to be repaired for free. --------------- snip > Ian Good practice here is: Never tell anyone where you keep your goat! PJ I know the comment wasn't your's, Ian. Sorry to see you go, if you do. > > Whatever you're used to Ian. Any name calling is pretty sophomoric. > > Most of us just yak about Corvettes, and I guess occasionally get [quoted text clipped - 21 lines] > > Ian > I know the comment wasn't your's, Ian. Sorry to see you go, if you > do. I wouldn't worry, I was never really "here" anyway. Ian > I have a 2004 Cadillac CTS-V (w/ Corvette Z06 LS-6 engine). Recently, I had > my tires rotated, and now the display for the tire pressure is wrong. It [quoted text clipped - 3 lines] > know how to recalibrate the tire pressure monitoring system? Thanks in > advacne. A tire pressure sensing system that needs recalibration with tire changes seems like a lot of bother and expense. A much simpler, less expensive and more reliable option would be a good tire pressure gauge stored on the glove compartment. >> I have a 2004 Cadillac CTS-V (w/ Corvette Z06 LS-6 engine). Recently, I >> had [quoted text clipped - 9 lines] > expensive and more reliable option would be a good tire pressure gauge > stored on the glove compartment. Good idea, how often do you check your tire pressure? Not a day goes by while driving do I not see tires that are under inflated, so having that gage in the compartment does little good unless used. With runflat tires the side walls are stiff enough that you can't visually "gage" the tire pressure. Since I like a car to run at peak tune, that includes tire pressure, it is a simple matter to check them while running down the road. I check my tire pressure nearly every time I drive the car. It took very little time to read the correct way to recalibrate the sensors and it takes less time that checking the pressure with a gage. On a trip through the Rockies I hit a sharp stone very hard and was able to bring up the tire pressure and watch it until I was where I could get safely off the road and out of traffic to check for damage. At that point the cost of the pressure sensors was cheap to say the least. Another system I see coming on line looks even better. It senses the rotating radius of all of the tires, ties into the braking and traction control system, and if it varies enough it will bring up a "low tire pressure" message on your DIC. By utilizing the systems already in place and working with the programming it brings about a very good and inexpensive warning system. I miss my Cadillacs - ;-( SignatureDad 05 C6 Silver/Red 6spd Z51 72 Shark Black/Black/4spd > >> I have a 2004 Cadillac CTS-V (w/ Corvette Z06 LS-6 engine). Recently, I > >> had [quoted text clipped - 11 lines] > > > Good idea, how often do you check your tire pressure? How often do I check tire pressure - every time I fill up. And I'm able to run the low profile wide tread tires on my car at least 10,000 miles longer than I would otherwise. And I rotate them regularly. > Not a day goes by > while driving do I not see tires that are under inflated, so having that > gage in the compartment does little good unless used. True, but the same can be said for a pressure monitoring system. For many drivers it will probably end up being another check engine light to be ignored. > With runflat tires the > side walls are stiff enough that you can't visually "gage" the tire > pressure. Anyone who thinks they can visually estimate 4 or 5 psi pressure loss with a regular radial tire is kidding themselves. Sure you can tell if a tire is at 20 psi when it should be at 35, but by then the damage is done. A simple pressure guage is apparently far more reliable that the built-in pressure sensing systems. How does the pressure monitoring system warn the average owner that it needs to be recalibrated to give a meaningful reading. That is a serious limitation for most drivers. > Since I like a car to run at peak tune, that includes tire > pressure, it is a simple matter to check them while running down the road. I [quoted text clipped - 14 lines] > > I miss my Cadillacs - ;-( >> >> I have a 2004 Cadillac CTS-V (w/ Corvette Z06 LS-6 engine). Recently, >> >> I [quoted text clipped - 20 lines] > able to run the low profile wide tread tires on my car at least 10,000 > miles longer than I would otherwise. And I rotate them regularly. You are rare indeed, seldom if ever have I seen anyone check their tires when they fill up, but then I've only been driving for 50+ years. How wide is wide? The 285-35-19 that I run will go way past the estimated mileage as they show on the tread depth right now for 11,000 and I don't rotate. Even when I worked in a service station in the early sixties we had to ask if the customer wanted his tires checked. Very few checked the tires and just a few had you check the oil. >> Not a day goes by >> while driving do I not see tires that are under inflated, so having that [quoted text clipped - 3 lines] > many drivers it will probably end up being another check engine light > to be ignored. So your contention is that those that ignore a trouble message will be using a tire pressure gage, get real. Very hard to ignore and it don't shut off by it's self. >> With runflat tires the >> side walls are stiff enough that you can't visually "gage" the tire >> pressure. > > Anyone who thinks they can visually estimate 4 or 5 psi pressure loss > with a regular radial tire is kidding themselves. Didn't even suggest that anyone could judge the actual pressure in a regular radial tire by it's looks, my reason for making that statement is because the runflats don't show any signs of low pressure at all, regardless of the amount. I see that you have had no experience with a runflat tire and therefore no experience with a pressure monitoring system. >Sure you can tell if > a tire is at 20 psi when it should be at 35, but by then the damage is > done. A simple pressure guage is apparently far more reliable that the > built-in pressure sensing systems. How do you know that? As far as the accuracy of a hand held tire gage, forget it. If you take most of them out and check the same tire with different gages of the same make they will give you varied readings. The only thing you know is that the pressure is similar in all four tires by using one gage. >How does the pressure monitoring > system warn the average owner that it needs to be recalibrated to give > a meaningful reading. That is a serious limitation for most drivers. Actually the Corvette system seldom needs "recalibrating" if ever, but it throws a warning if the readings vary considerably between all four tires. The pressure seems to be monitored very well as checked by an industrial dial pressure gage with a tire chuck attached, not the $1.97 trash that most people use. Of the 4 Corvettes I've had with pressure monitors I've recalibrated them maybe a half dozen time, and all of those were when I was mounting racing tires on different rims with diffrent sensors and/or switching back to street tires. After the first time they would set themselves and not require recalibration because they went to the same location. SignatureLife is a waste of time Time is a waste of life Get wasted all the time Have the time of your life > >> >> I have a 2004 Cadillac CTS-V (w/ Corvette Z06 LS-6 engine). Recently, > >> >> I [quoted text clipped - 28 lines] > customer wanted his tires checked. Very few checked the tires and just a few > had you check the oil. Pressure checking is not so rare at least in my area. > >> Not a day goes by > >> while driving do I not see tires that are under inflated, so having that [quoted text clipped - 6 lines] > So your contention is that those that ignore a trouble message will be using > a tire pressure gage, get real. Nope, my point is that a pressure warning system is a tool that could be useful, but will be ignored by many and will become little more than another expensive automated gadget t ignore or figure out how to switch off. A pressure gauge will be as effective an automated warning system for most drivers. And it will be a whole lot cheaper. > Very hard to ignore and it don't shut off by > it's self. Unfortunately there are a lot of drivers who have conditioned themselves to routinely ignore the check engine and engine warning lamps as well as the text messages that scroll across the dashboard display. Like the many people who continue to run out of gas after the needle has passed into the orange area AND the red warning light has gone on. > >> With runflat tires the > >> side walls are stiff enough that you can't visually "gage" the tire [quoted text clipped - 8 lines] > amount. I see that you have had no experience with a runflat tire and > therefore no experience with a pressure monitoring system. Quoting you: ...are stiff enough you can't visually "gage" the tire pressure. It is not possible to visually gauge tire pressure with any reliability under any circumstance period. > >Sure you can tell if > > a tire is at 20 psi when it should be at 35, but by then the damage is [quoted text clipped - 6 lines] > only thing you know is that the pressure is similar in all four tires by > using one gage. Really now. If handheld gauges are that inaccurate then how useful or accurate can we expect a pressure sensing system to be. Remember, it is nothing more than analog sensors rigged to a digital display. And how can a driver rely on such a system if it goes out of calibration with no warning. I've checked several different handheld gauges and they are plenty close enough for maintaining reasonably accurate pressure. > >How does the pressure monitoring > > system warn the average owner that it needs to be recalibrated to give [quoted text clipped - 10 lines] > themselves and not require recalibration because they went to the same > location. Your experience does not appear to be the same as the caddy owner - strange isn't it. Come to think of it I have never had a handheld analog gauge go out of calibration. > Life is a waste of time > Time is a waste of life > Get wasted all the time > Have the time of your life That's an "unusual" way of dealing with life, wouldn't you say? > Pressure checking is not so rare at least in my area. I'd have to see that to believe it. >> >> Not a day goes by >> >> while driving do I not see tires that are under inflated, so having [quoted text clipped - 14 lines] > off. A pressure gauge will be as effective an automated warning system > for most drivers. And it will be a whole lot cheaper. Ah yes, it is cheaper and the pressure monitering system will be very hard to remove cheaply from any car that is built with it in the system. I assume that you will not buy a car after the required pressure sensors are in the 2010 models? Actually seems like your point is that you're cheap and the government can't change that by mandating pressure sensors. By the way they are also trying to get the runflats mandatory are you going to resist that also or just the pressure sensors? >> Very hard to ignore and it don't shut off by >> it's self. [quoted text clipped - 5 lines] > needle has passed into the orange area AND the red warning light has > gone on. Wow, you got that down pat, I've never seen that orange area or the red light, what happens next? You are still suggesting these people will use a tire gage over reacting to a warning light? >> >> With runflat tires the >> >> side walls are stiff enough that you can't visually "gage" the tire [quoted text clipped - 14 lines] > pressure. It is not possible to visually gauge tire pressure with any > reliability under any circumstance period. Now come on, is it the thumpty thump that tells you a tire is flat? Or, big question here, can you see that the rim is very close to the ground or the tire has a much larger bulge in the side, (runflat not included), than do the others on the vehicle? Actually you can see it, you can hear it, you can feel it, and last but not least, you can smell them when they go flat, all of this is under certain conditions of course. >> >Sure you can tell if >> > a tire is at 20 psi when it should be at 35, but by then the damage is [quoted text clipped - 14 lines] > they are plenty close enough for maintaining reasonably accurate > pressure. Did you ever hear about offsets for tweaking the accuracy of the interface between a electronic component and its sensor? My assumption is that if a system goes out with no warning that it is the same as any other aspect of life, you deal with it. Why do you think they go out without warning, I don't remember that being the issue? Nothing was said about that, only when his tires were rotated and the revenue enhancement guru kicked in. >> >How does the pressure monitoring >> > system warn the average owner that it needs to be recalibrated to give [quoted text clipped - 17 lines] > strange isn't it. Come to think of it I have never had a handheld > analog gauge go out of calibration. You should use it more, but then close is good enough as you seem to think. All of our analog gages were calibrated on a regular basis and they do/did fail, but then I dealt with precision gages and if you do it would surprise me. My direct reference was to the Corvette as it is cross posted, I would expect you to realize that. In reality the Cadillac owner was talking about them wanting an added cost figure for resetting his sensors. My first reply was how to do it yourself. You are the one that is fixated on the usefulness/value of the pressure monitoring system. >> Life is a waste of time >> Time is a waste of life >> Get wasted all the time >> Have the time of your life > > That's an "unusual" way of dealing with life, wouldn't you say? Can be and if that's the way you might choose to live, that is your choice. SignatureLife is a sexually transmitted condition that is always fatal. > > Pressure checking is not so rare at least in my area. > > [quoted text clipped - 26 lines] > are also trying to get the runflats mandatory are you going to resist that > also or just the pressure sensors? Nope, didn't say that did I would stop buying cars now did I. Truly an asinine statement for you to make wasn't it. I was also stating the obvious - that there are a lot of drivers who routinely ignore important information fed to them via the dashboard. Just because the latest warning system has to do with tires is no reason to believe their behaviour will change one whit. > >> Very hard to ignore and it don't shut off by > >> it's self. [quoted text clipped - 9 lines] > light, what happens next? You are still suggesting these people will use a > tire gage over reacting to a warning light? What happens next should be obvious. The engine stops. I can't tell you the last time I ran out of gas, but there are plenty of people who do. As I've restated several times now those people will ignore useful information provided them no matter the subject. I can't tell you why...maybe unlike you and me they don't appreciate the consequences of ignoring warning messages. Will they use a tire pressure gauge if it is in the glove compartment - most likely not. But having an unused analog gauge in the glove compartment is a whole lot cheaper than an unused analog tire pressure monitoring system installed in the car. > >> >> With runflat tires the > >> >> side walls are stiff enough that you can't visually "gage" the tire [quoted text clipped - 21 lines] > feel it, and last but not least, you can smell them when they go flat, all > of this is under certain conditions of course. Unfortunately it is the thumpty thump or the loss of steering control will be the first warning sign most drivers will heed. Wish driver behaviour was more defensive, but in my experience most drivers react to the consequences of problems rather than anticipating them. > >> >Sure you can tell if > >> > a tire is at 20 psi when it should be at 35, but by then the damage is [quoted text clipped - 6 lines] > >> only thing you know is that the pressure is similar in all four tires by > >> using one gage. If you don't believe what should be obvious, just try a blind test. > > Really now. If handheld gauges are that inaccurate then how useful or > > accurate can we expect a pressure sensing system to be. Remember, it [quoted text clipped - 50 lines] > > > Can be and if that's the way you might choose to live, that is your choice. It would appear to be your choice in responsible lifestyle given that it appeared at the end of your post. > -- > > Life is a sexually transmitted condition that is always fatal. A couple of items that seem to be in confusion here. 1. The caddys need to know which sensor is reporting from what corner, hence the reprogramming requirement on a rim relocation. 2. The vette\caddy system is accurate to pounds pressure while the abs derived system is only proportionally accurate. In other words it comparing 1 tires rotating distance against the other tire. If you think about the amount of pressure loss needed to be useful as a "tool" then it's pretty much only usefull in warning of immnent disaster, not tire pressure monitoring.(they are talking about being able to detect a 20% loss of tire pressure as a usefull indicator) >>>>I have a 2004 Cadillac CTS-V (w/ Corvette Z06 LS-6 engine). Recently, I >>>>had [quoted text clipped - 54 lines] >> >>I miss my Cadillacs - ;-( > A couple of items that seem to be in confusion here. > 1. The caddys need to know which sensor is reporting from what corner, [quoted text clipped - 6 lines] > pressure monitoring.(they are talking about being able to detect a 20% > loss of tire pressure as a usefull indicator) I don't know much about the Public Citizen group, but the concerns they raise are enough to make me wonder how useful tire pressure information will be if the thresholds are as low as they describe. I'm also concerned about a statement by that group that the systems do not have to work with replacement tires. And apparently the final rule says the systems need not measure tire pressure until a motorist has been driving between 30 and 60 miles per hour continuously for 20 minutes. If true, TPMS with that threshold of operation would be useless in most urban/suburban highway settings. It sounds like there will be little consistency in tire pressure information between car manufacturers because of the exceptions permitted under the rule. See this link - what do you think: http://www.citizen.org/autosafety/nhtsa/tread/tpms/index.cfm >Another system I see coming on line looks even better. It senses the >rotating radius of all of the tires, ties into the braking and traction >control system, and if it varies enough it will bring up a "low tire >pressure" message on your DIC. By utilizing the systems already in place and >working with the programming it brings about a very good and inexpensive >warning system. Some of the manufacturers (Pontiac is one that comes to mind on the Bonneville) are already using such a system: it is easy to do on a car with ABS because you already have rotational sensors at each wheel - all you need is the proper software code to process the information and display it (uou look for differential in the number of pulses per mile from the ABS wheel sensora, which tanslates to a difference in diameter of the tires from one side to another, the theory being that most of the time not all tires are low on air pressure at the same time).. Unfortunately, the NHTSA doesb't think such a speed sensor system is accurate enough - in a new safety mandate they haded down a few months ago that, if memory serves me correctly takes effect in 2010, that will require tire pressure monitoring on all cars. The NHTSA has specifically said that rotation sensor-based systems will NOT be acceptable. >I miss my Cadillacs - ;-( I feel your pain - I miss my old Cadillac too. But lordy the new ones are so butt-ugly - last decent looking Cadillac was the last-generation Seville. I would not take a CTS if someone gave me one. Regards, Bill Bowen Sacramento, CA snip > Unfortunately, the NHTSA doesb't think such a speed sensor system is > accurate enough - in a new safety mandate they haded down a few months [quoted text clipped - 12 lines] > Regards, > Bill Bowen Even at my age my butt looks better than the CTS. My last Seville STS was a sad disappointment. Had it less the a year, still waiting for them to make something exciting again. May have to get a Z06 after the price gougers get done and just drive 2 Corvettes. SignatureLife is a sexually transmitted condition that is always fatal. > Good idea, how often do you check your tire pressure? Not a day goes by > while driving do I not see tires that are under inflated, so having that [quoted text clipped - 16 lines] > working with the programming it brings about a very good and inexpensive > warning system. This system is already in use. I first saw it on the 97 Grand Prix. It was the same on my 2000 Grand Prix and is in place on my 2005 Grand Prix. Just a simple system that uses the abs wheel sensor to detect a difference in the rotational speed of the wheel compared to the others. I suppose if all tires were low to the same degree it wouldn't detect it. Had it warn of a low tire (nail) once so I guess it works. Dave WI >>> I have a 2004 Cadillac CTS-V (w/ Corvette Z06 LS-6 engine). Recently, I >>> had [quoted text clipped - 32 lines] > >I miss my Cadillacs - ;-( My mom's 2000 Regal has that low tire light system. The one that utilizes the ABS and TC system. Not sure if my new car, a 2006 Grand Prix, will have the actual pressure displayed or just a low tire warning... John - The tire pressure warning system is a necessity on these cars because their run-flat tires do not "feel" flat enough when deflated (or just underinflated) to warn *all* drivers. Given the need for the system it's certainly nice that it tell me which tire needs attention. If the system is to report which tire needs attention, then the car must be able to distinguish between the four pressure reporting widgets. The two ways to do this are to build four identical transmitters and four different receivers (one near each tire), or to give the transmitters an ID code and use a single receiver. The latter is cheaper, simpler, and more reliable. It also lets GM use the existing RF receiver already there for the keyless entry system. This isn't cheapness, it's just good engineering. If the transmitters have ID codes, then the receiver must know which transmitter is where on the car. Thus the need for recalibration if the tires are rotated. It all stems from good decisions. On the Corvette - at least on the C6 - it's a moot point anyhow, since all four tires and wheels are different and rotating them would not work out to advantage. -- V So we are a caddy forum now? Man I have learned more about cadilac in the last few days... Hmmmm vette or caddy? SignatureZÿRiX (<>..<>) I have a 2004 Cadillac CTS-V (w/ Corvette Z06 LS-6 engine). Recently, I had my tires rotated, and now the display for the tire pressure is wrong. It reports the pressure for the back tires as the front tires. The Cadillac dealer wants $15 to "recalibate" the system, but I'd like to do myself. I believe this system is identical to the one of the Corvette. Does anyone know how to recalibrate the tire pressure monitoring system? Thanks in advacne. > So we are a caddy forum now? > Man I have learned more about cadilac in the last few days... [quoted text clipped - 11 lines] > know how to recalibrate the tire pressure monitoring system? Thanks in > advacne. Bound to happen since they are made in the same plant. ;-) (sic) SignatureDad 05 C6 Silver/Red 6spd Z51 72 Shark Black/Black/4spd It appears the thread has been cross posted. SignatureDon "Some mornings it's just not worth chewing through the leather straps." > So we are a caddy forum now? > Man I have learned more about cadilac in the last few days... [quoted text clipped - 9 lines] > know how to recalibrate the tire pressure monitoring system? Thanks in > advacne. > So we are a caddy forum now? > Man I have learned more about cadilac in the last few days... > > Hmmmm vette or caddy? Well the Caddy XLR and the Vette are very close to each other once you get under the skin. Ian > So we are a caddy forum now? > Man I have learned more about cadilac in the last few days... [quoted text clipped - 12 lines] > know how to recalibrate the tire pressure monitoring system? Thanks in > advacne. > So we are a caddy forum now? > Man I have learned more about cadilac in the last few days... [quoted text clipped - 12 lines] > know how to recalibrate the tire pressure monitoring system? Thanks in > advacne. you need a special wieless tool to wake up your tire sensor, when you want to retate your tire position. that is a big problem for existing TPMS. because even tire maintain shop, they don't has this tool. it is very expensive, especially each car brand model has different tools. so even tire maintain shop they are not willing to buy it. there is a one way you can rotate your tire. take back your wheel in correct location. and only change your tire (wheel can not be changed, becasue the tire sensor had monted in the wheel), because the OEM TPMS has no this new function for reconize seosor ID locatoin. so you only can do this way for DIY. Try Orange TPMS (www.orange-electronic.com), Orange TPMS can be easy DIY to rotate your tire from front to rear or from right to lefe side and without any tool. that's a reason Orange TPMS is popular in TPMS market. you also can download their manual from their website. if you have any questoin for TPMS, you also can write email to Orange Electronic Co.Ltd. they are willing to help everybody for TPMS issue. the only one way for your DIY is put back your tire in correct way. then take off the tire only (wheel cannot be changed the location, because the tire sensor had monted in the wheel), then change tire location only, not wheel. actually, they has a special wireless tool to wake up your tire, but the tool is not so cheap, and every car brand has differnet code tools, and these OEM sensor supplier has no technology for re-location function for without tool. therefor, even tire manitain shop, they hate that job for location tire. Try Orange TPMS (www.orange-electronic.com), they has this function inside, thus, if you want to rotate your tire location, you just change it ans normal, their receiver will be auto catch the new ID and locatoin of tire. that is a new technology. if you have any question in TPMS, you can just write them an email. they are willing to answer you any TPMS questions. > So we are a caddy forum now? > Man I have learned more about cadilac in the last few days... [quoted text clipped - 12 lines] > know how to recalibrate the tire pressure monitoring system? Thanks in > advacne. |
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