I have an 08 Z with all the techno-stuff we love and hate...The tire pressure monitor system (TPMS if I'm not mistaken) is sort of built into the computer on this car, from what I hear.
Is anyone tracking a 2008 Z on race tires or at least a set of dedicated tires with wild PSI's and having problems or has dealt with problems with this system and how?
My idea, and please feel free to steal it, patent it, and send me the first set...is to make "dummy" wheel sensors for racing wheels that tell the computer everything is a fine 32psi, essentially defeating the system and allowing you to run without the computer shutting you down.
I have an 08 Z with all the techno-stuff we love and hate...The tire pressure monitor system (TPMS if I'm not mistaken) is sort of built into the computer on this car, from what I hear.
Is anyone tracking a 2008 Z on race tires or at least a set of dedicated tires with wild PSI's and having problems or has dealt with problems with this system and how?
My idea, and please feel free to steal it, patent it, and send me the first set...is to make "dummy" wheel sensors for racing wheels that tell the computer everything is a fine 32psi, essentially defeating the system and allowing you to run without the computer shutting you down.
Any thoughts??
I had the exact same thought...but nope will not work. I bought a TPMS handheld programmer thingy, and reprograme when I change.
it would seem the on-board has no memory and cannot identify wheel off-side left a and b for example. The TPMS tool was frankly cheap and is easy to use.
Can you explain more. Are you saying you have a set of race wheels that have their own tpms sensors that you have the car recognize? If so, are the pressure ranges you choose acceptable?
If so, also, why would you need a tool to reprogram the car. Can't it be told to recognize new tpms sensors without a separate tool?
And when you say the "dummy" TPMS sensors wouldn't work, do you mean there are none currently made, or that there is some other reason that they won't work?
All you have to do is get a box and put the sensors in the box and pressure the box to 32 psig and put the box in the car.
That won't work. The TPMS has to 'see' the velocity of each sending unit, measured in rpm. Simply put, the wheels have to be turning at a rate equal to ~20 mph or more for >2 minutes . At that time each TPM sensor sends a signal on UHF frequency 315 Mhz to the car.
Each wheel has to have its own TPM sensor and each wheel must be installed on the car. Every time a wheel is put on or rotated to a different position you have to re-initialize all four sensors.
The default (stock) allowable tire pressure range is 28-39 psi.* The TPMS will display a warning on the DIC if a tire is over pressure and will default to Traction Control ON and Reduced Power Mode (aka "limp mode") if one is under pressure. At which time the DIC will display "Maximum 55 mph / Reduced Handling".
There is no way to disable the TPMS, in accordance with federal law.
If one or more TPM sensors are INOP or not installed a "Service Tire Monitor" message will be displayed on the DIC and a code will be set in the PCM. Pressing reset will remove the message from the DIC, but the code will remain in the PCM.
*The Remote Control Door Lock Receiver (RCDLR) is the Body Control Module (BCM) that receives the signals from the TPM sensors. It can be re-programmed with a Tech 2 to reflect different tire placard information, including nominal psi range. However, that is too much trouble to go through each time when swapping wheels/tires.
Can you explain more. Are you saying you have a set of race wheels that have their own tpms sensors that you have the car recognize? If so, are the pressure ranges you choose acceptable?
If so, also, why would you need a tool to reprogram the car. Can't it be told to recognize new tpms sensors without a separate tool?
And when you say the "dummy" TPMS sensors wouldn't work, do you mean there are none currently made, or that there is some other reason that they won't work?
Thanks.
Two sets of wheels, two sets of TPM. Each TPM has a serial number ID which needs to be programmed to near side, off side front and back individually. If the sensor is not in rotation, but the car is moving you will get a fault. the wheel is considered dead, and the engine goes to flat tyre mode. (Crawl Home).
The tool is cheap and used by GM dealers. it is not the BCM tool.
I admit not having tried the TPM in the box routine, possible a low cost experiment. But the system needs to "see" four sensors.
Pressure ranges remain as per needs. (Air temp, Track temp, fuel weight etc...)
I admit not having tried the TPM in the box routine, possible a low cost experiment.
Don't bother. See above.
There are a number of work arounds that have been attempted, including that one.
One that has worked for some people is to keep TPM sensors that have already been registered with the car, in the pit area. You can leave them on wheels if you want. When you come in the car will 'see' them and you're good for another 30 - 60 mins. After that time has elapsed and the car has not seen previously registered TPM sensors it will warn you as above.
Here are some videos of some various tools as well as the procedure for using a TPMS tool to register TPM sensors with the car. Note the use of the T.I.P.S. tool...
I have wondered about this issue also. From what I've read here, there is no way to defeat this problem if you want to run another set of wheels/tires for a DE, or whatever. Am I understanding this correctly?
I must get one of these tools and reset the car system every time the wheels are changed?
Please correct me if I'm wrong, but my idea of "blank", or "dummy" TPM sensors would work and the issue of swapping tires is another headache that requires further techno gadgets to be able to program the car to read the new ones...
So:
1) It's probably not lawful to make "dummy" TPMS, so that's issue one.
2) who would take the risk legally and liabiliy-wise to make them?
But...They should be relatively cheap to make (less than an actual sensor) and this is going to be an issue for ALL makes of cars in the very near future iinm. There will be many weekend warriors willing to pay some green for this item if I'm reading this right...I knew I should have gone into electrical engineering...
Dummies or not, the TPM sensors must be registered with the car and they have to be on the car. They do not signal the RCDLR until the vehicle speed has exceeded 20 mph for over 2 minutes.
Thus, you may as well install legitimate TPM sensors. They're about $74 ea. I doubt you could design and manufacture any that worked, for less.
Really, the easiest way is to get a set of track wheels cut for TPM sensors and install the sensors on them. After that, all you need do is the re-learn procedure which takes less than 2 minutes as shown in the video.
DJWorm is right of course, but I only do HPDEs so my options are different. I use sensors in my track tires and they do exceed the max pressure occasionally. I hit reset and press on with my laps
To be honest, in the Alabama heat, my DIC lights up like a dang Christmas tree. high tire pressure, high trans temp, high oil temp. I've got a box full of Amsoil products (thanks DJWorm ) that I'm going to put in before the next event.
__________________
2002 EB Z06, NCM Member, LTPWS, K&N, CAGS eliminator, CLB, DRM brake ducts w/Phoenix spindle adapters, Ron Davis radiator/EOC, Carbotech pads, Goodridge brake lines, Speedbleeders, Elite Engineering Heel/Toe pedal / oil catch can / radiator screen, TurnOne PS pump, Optima red top, C6 Z06 Shifter, Corbeau A4s, BK Harness bar and belt mounts, Simpson 5 pt harnesses, Driver tuned by Spring Mountain
The high trans and oil temps can be dealt with by installing the appropriate coolers. Use 100% Nitrogen in the tires to help mitigate the effects of temperature on tire pressures.
The RCDLR (Remote Control Door Lock Receiver) is signaled by the TPM sensors and if a tire pressure is outside of the required range the RCDLR sends that information to the BCM (Body Control Module) which then triggers the IPC (Instrument Panel Cluster) to display the appropriate warning on the DIC (Drivers Information Center). The PCM (Powertrain Control Module) (aka "ECM") is not involved.
The TPMS (Tire Pressure Monitoring System) can not be easily disabled. To do so requires removal of at least the RCDLR and the BCM.
Once again, you can use a Tech 2 to reprogram the RCDLR in order to permit a different tire pressure range, such as that used in race tires or try one of the other workarounds.
The Tire Inflation Positioning Switch (T.I.P.S.) Service Tool as shown in the video runs about $458.00.........
Anybody want a brand new TIPS for less than 1/2 the price above, or a used KTi p.s.t. for even less, shoot me a PM. They are the exact same tool except the KTi is red and the TIPS is green.
I've got a Schrader 21210 also for less than 1/2 that price above.
Bob
Last edited by BEZ06 : 07-03-2008 at 07:38 AM.
Reason: Added video
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