: Do tire pressure sensors need to be reset?



JAY WEST
08-17-06, 09:21 PM
I bought a new set of wheels with tire pressure sensors already in them, the wheels are used and from the same year and model(V). The rims are larger and tires IMO higher performance, so I am running higher pressure in the tires, but the display shows between 28 to 30, I am running 39 or 40 psi. Is there a way to reset the TPS these to read correctly? Any help is appreciated.

VELOSE
08-17-06, 09:53 PM
From Cadillac CTS / CTS-V and STS / STS-V Frequently Asked Questions (FAQ) (http://www.cadillacfaq.com)

How to reprogram the Tirepressure Sensor guage (+images)
UPDATE 8/24/04

Well, the same module reads all the RF stuff on the car including both fobs and all four tire pressure sensors. If the key fobs are working but the tire pressure sensors aren't, they'll probably just need to reprogram the sensors. The module they replaced had individual codes for each of the four sensors stored in it. When you replace the module, those codes go with it and the new module has blanks in place of the codes. Simple routine if you wanna reprogram them yourself:

1) key in RUN, engine off
2) park brake set, cluster on pressure display
3) press and hold BOTH the LOCK and UNLOCK SIMULTANEOUSLY for about 10 secs until the horn honks. (on the Keyless Entry remote)
4) let air out of (or put air into) Left front tire until you hear another horn honk (only let the air our for about 3-5 seconds.... then be patient and wait for the honk... it could take up to 20-30 seconds before it honks)
5) repeat on Right Front tire
6) repeat on Right Rear tire
7) repeat on Left Rear tire
8) after left rear tire you should hear a double honk and the process is complete
9) verify the pressures on the cluster display
Note: it's easier to let air out of the tire, of course, but then you'll probably have to put some back into the tire when the process is complete. The dealer should have a tool that looks like a garage door opener that they can use in place of the air-letting procedure. It excites a mechanism inside the sensor so they don't have to fool with the air pressure. Target for every day driving pressures should be shown on a sticker on the door, I think.

Tire pressure units:
part number is: 25774006 NEW (old part number=25763677)
Dealer cost is $52.00 a piece.

Florian
08-17-06, 10:03 PM
sure do...see above.


F

JAY WEST
08-18-06, 01:20 AM
Thanks Frank.....-Jay

VELOSE
08-18-06, 11:05 AM
Can I get some Zoints points for the love? :D

50 4Ever
08-18-06, 03:03 PM
I bought a new set of wheels with tire pressure sensors already in them, the wheels are used and from the same year and model(V). The rims are larger and tires IMO higher performance, so I am running higher pressure in the tires, but the display shows between 28 to 30, I am running 39 or 40 psi. Is there a way to reset the TPS these to read correctly? Any help is appreciated.

I would advise against running that high of pressure in the tires, even if they are hot. Even in high performance tires the pressure should be 30 PSI cold. When I go out on the track I adjust my pressure to 32 PSI before each session so they heat up to about 36 PSI. Also, 39 to 40 PSI cold will set off alarms when the tires heat up.

VELOSE
08-18-06, 04:25 PM
The tire pressure monitor alarm goes off at 42lbs. If you inflate them to 40lbs cold, once you go down the street you'll hit the alarm of 42lbs. For street, I set them to 35-36lbs cold. Once they warmed up to freeway temps they were 39-40lbs. On really hot days they can get warmer. My advice, go with 36lb cold. ;)