How to reset or clear "Service LTPWS" light? 1996 LT1

[wawhite]

I have read comments on the LTPWS, but not heard the procedure to clear the code or turn off the light if the "Service LTPWS" light comes on.
Here's the story: tire dealer broke the sensor in RF wheel.......it was roling around inside the tire.......and the Service LTPWS light came on. I took tire back to tire store and they replaced the sensor (claiming it was the right one for that wheel).
I drove the car and the service light came on after a few miles. Took the car to the Chevy dealer and paid to have a mechanic "recalibrate" the system and clear the trouble code. Drove away from the dealer and in a few miles the Service light comes back on!
So, is the new sensor not working, the wrong one, or what? If one of CAC members has the factory manual and can tell me (or send email) as to details about this system, and if there is such a thing as "recalibrate" or if I have to do something to "reset" the system, once we know the corect sensor is in the tire. I'm going back to the tire store to verify the correct sensor was installed.

Sad fact is the tire store knew the wheel had the sensor in it, but still some tire person broke it!

Thanks all.

 

[KOPBET]

Replace sensor.
Clear DTCs by grounding DLC terminal 6 to 5, three times in ten seconds.
Receiver/control module will confirm that its memory has been cleared by illuminating both the "L0W/FLAT TIRE" and "SERVICE LTPWS" lamps at the same time. Both lamps will remain ON until the ignition is turned to the OFF position and then back to "ON".

RF sensor MUST be color code BLUE.
If you still get codes, read out the DTCs by connecting DLC terminal 6 to 5 to flash LTPWS. Look for 23, 33, 43, 53 or 24, 34, 44, 54. Right front is LOW TIRE DTC 53 and WHEEL SENSOR DTC 54.

All codes will be preceded with DTC 12. DTC 99 is possible receiver fault.

 

[wawhite]

Thanks KOPBET.
I was able to reset the system and I drove for about 15 miles up to 85 mph and no light. Then as I was pulling in my driveway, the "Service" light came on. Strange. The tire installer insists the sensor had a blue color code. I'll read new trouble codes to see what is reported.

 

[Rich96c4ce]

Also, see: http://www.corvetteactioncenter.com/kb/category.php?catId=59
for LTPWS info.

Sound like the sensor is the wrong one (see above for correct PN and ID), or the sensor is bad.

Similar thing happened to me recently, but it was the tire shop the last owner used who broke it, used tie wraps to hold it together, then it came apart at about 110 mph at the end of the quarter mile one Friday T&T night. Bang, yellow light, 110 mph, scary, but the car's performance and handling didn't change. I stopped; everything looked fine. Back in the staging lanes, there was a clanging in the right front at a walking pace, but no noise at a faster pace. I figured that the sensor had broken loose and was falling onto the wheel at slow speeds, and was held against the tire at higher speeds. A disection the next week showed about 30 loose parts inside the tire, but with the band still secured to the wheel. There were two suspicious tie wraps, and a missing chunk of plastic housing. So, now there is no bulb until I get a replacement RF sensor, and my next set of Nitto DRs!

 

[wawhite]

LTPWS adventure:
Tire guy broke original RF sensor. It fell apart on drive, greatly affecting wheel balance. "Service LTPSW" light comes on. I remove wheel and hear and feel things rolling around inside.
Tire store replaced sensor. Service light still came on. Tire store says take it to Chevy dealer to get the system reset. Chevy service writer consults with mechanic and they come up with great story about having to recalibrate all of the wheels. After mechanic performs his magic, I drive away and Service light comes on. Service writer suggests the problem is more serious, come back Monday with lots of money.........
I consult various Corvette forums and get details about how LTPWS works and how to read codes.........code on my car says "54".....RF sensor not working.
I take wheel back to tire store (they reimbursed the Chevy dealer bill) and they order another sensor. Pick up tire 2 days later and go for 20 mile test run. Service light does not come on. Problem cured.
Moral of the story: Seek technical advice from forums and internet, and never assume an electronic part is good just because it is new.
I need a '96 factory manual.......back to eBay.....
Thanks to all who provided the details of the LTPWS. I suspect many owners have had the pressure sensors broken. Tire stores are going to have to better train their crews. Future NHTSA legislation requires tire pressure warning systems on all cars in a phase in program that has started (http://www.nhtsa.dot.gov/cars/rules/rulings/TirePresFinal/)

 

[Rich96c4ce]

LTPWS adventure: ..........Tire stores are going to have to better train their crews. B] Amen! Got to be there watching them. Your owners manual tells all about where the sensor is located.

............NHTSA legislation requires tire pressure warning systems on all cars in a phase in program that has started (http://www.nhtsa.dot.gov/cars/rules/rulings/TirePresFinal/) [/B] [ B]Some will use the ABS system to determine differences in tire rpm among your tires. That system has to be calibrated whenever you change tires to let the computer know what the correct relative rpm is. The other type is like the C5 system that is a direct pressure reading system.[/B]

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