TPMS Reading Problem
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 2,130
Likes: 5
From: Seattle WA
TPMS Reading Problem
I took on the caliper painting DIY project this weekend. Of course this called for removing the tires. One of the tires I removed turned out to have a nail in the tread. I loaded that tire into the SUV and had the wife take it to Goodyear for repair.
When I got the tire back, I mounted it in the same spot. I took a manual tire pressure reading and found it at 39 psi. I let out 9 psi to get it back to 30. When I fired up the car and used the DIC to see all pressures, that tire kept reading 39 psi (the other tires were correct). I did a manual check again and the pressure is indeed 30 psi. I could not find anything in the manual about resetting it, if that would even be the correct course of action.
What do you think the issue is?
When I got the tire back, I mounted it in the same spot. I took a manual tire pressure reading and found it at 39 psi. I let out 9 psi to get it back to 30. When I fired up the car and used the DIC to see all pressures, that tire kept reading 39 psi (the other tires were correct). I did a manual check again and the pressure is indeed 30 psi. I could not find anything in the manual about resetting it, if that would even be the correct course of action.
What do you think the issue is?
Team Owner
Joined: Aug 2003
Posts: 24,502
Likes: 312
From: Scottsdale AZ
Remember that the car has to travel a few miles for the TPS to update the DIC . . . to the best of my understanding, it doesn't update while the car is turned off or at idle.
Glad you caught the nail before it caused a greater problem!
Glad you caught the nail before it caused a greater problem!
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 2,130
Likes: 5
From: Seattle WA
A bit of a false alarm, it is fine now. When I saw the issue, I drove for about a 1/2 mile. Came back and the issue remained. Turned the car off and back on, and it was still wrong. Let the car sit for 10-15 minutes, and started it again. The TPMS was correct. Guess I should have given it more time, but I'd still like to know under what conditions it resets.
Last edited by S2K; Jun 24, 2007 at 08:39 PM.
CF Senior Member
Joined: Feb 2006
Posts: 23,313
Likes: 25
From: Tucson Arizona
At least that was my experience...I recently bought a re-set tool (through our resident TPS expert beezeye) but before the tool arrived, I needed to 'register' my new TPS's...Discount Tire did it gratis.
Race Director
Joined: Jan 2005
Posts: 10,924
Likes: 854
From: Daytona Beach FL
When you park the car and it remains motionless for 15 minutes the sensors go into a "sleep" mode to save the batteries - the sensors only transmit once every 60 minutes.
When you start driving the car, centrifugal switches in the sensors detect wheel rotation when you get up to about 20 mph and the sensors start transmitting once per minute (although I've also read that it's once every 15 seconds - and I think if they detect a certain change in pressure like a tire going flat, they'll transmit immediately).
So......like other posts have said, after the car sits still for a while you'll need to drive it up over 20 mph for a short while to get the sensors transmitting the proper tire pressures to the TPMS and the DIC display.
Bob
When you start driving the car, centrifugal switches in the sensors detect wheel rotation when you get up to about 20 mph and the sensors start transmitting once per minute (although I've also read that it's once every 15 seconds - and I think if they detect a certain change in pressure like a tire going flat, they'll transmit immediately).
So......like other posts have said, after the car sits still for a while you'll need to drive it up over 20 mph for a short while to get the sensors transmitting the proper tire pressures to the TPMS and the DIC display.
Bob
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Michael S. Palmer
Race Director
Joined: Jan 2005
Posts: 10,924
Likes: 854
From: Daytona Beach FL
I'm glad it worked itself out. FYI...you can go to most any Discount Tire outlet and they'll re-set your sensors without charge.
At least that was my experience...I recently bought a re-set tool (through our resident TPS expert beezeye) but before the tool arrived, I needed to 'register' my new TPS's...Discount Tire did it gratis.
At least that was my experience...I recently bought a re-set tool (through our resident TPS expert beezeye) but before the tool arrived, I needed to 'register' my new TPS's...Discount Tire did it gratis.
Yeah, it will be nice to have your own tool!
Did the Discount guys know how to do the procedure, or did you have to help them out getting it into the learn mode?
I've got a couple tools ($160 shipped) if anybody else needs their own.
Bob
Burning Brakes
Joined: Jan 2005
Posts: 1,015
Likes: 0
From: Granby CT
Had a similar problem and pressed the reset button at the bottom of the displays and it seemed to cause the update to happen. It could have been just good timing but this seemed to cause an immediate read of the pressures.
Thread Starter
Melting Slicks
Joined: Mar 2004
Posts: 2,130
Likes: 5
From: Seattle WA
Actually I tried that as well when I was thinking there might be a "reset" feature. It didn't work. I think it might have been good timing for you.
