DIC Accuracy for TPMS
Drifting
Joined: Mar 2016
Posts: 1,665
Likes: 128
From: Wilson, TX
St. Jude Donor '17
Mine does the same thing, the Corvette "specialist" at my local dealer says pay attention to the DIC but it shows 27 when both of the guages I use say 30.
Be interesting to see more opinions.
Be interesting to see more opinions.
Thread Starter
Burning Brakes
Joined: Oct 2015
Posts: 922
Likes: 109
From: Crowley Texas
Drifting
Joined: Oct 2010
Posts: 1,513
Likes: 86
From: Rocheport Missouri
Every post I have read where there is a low pressure message on the DIC, that mysteriously goes away, has responses saying that the car must be driven a bit for the TPMS sensors to transmit the actual pressure to whatever module reads them.
If that is true, would the module simply hold the last pressure read? Or am I missing something?
If that is true, would the module simply hold the last pressure read? Or am I missing something?
Drifting
Joined: Mar 2016
Posts: 1,665
Likes: 128
From: Wilson, TX
St. Jude Donor '17
That would make more sense to me. During service, the tech filled the tires to 31 on the DIC when I had filled them to 30psi with my guage, 3 lbs difference from what the DIC said. When I got the car out yesterday for a drive, the tire pressure read 34. Maybe driving it is the key.
Last edited by pagosawingnut; May 22, 2016 at 05:21 PM.
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Brett Foote
Team Owner
Joined: Mar 2008
Posts: 21,502
Likes: 461
From: Southern Utah
The purpose of the TPMS system is to tell the driver when a tire has a leak because the leak can't be seen visually with the runflat tires. As such, it really doesn't matter if some sensors are a couple of pounds off of what a handheld gauge says. Use a good gauge to fill the tires, then use the DIC readings to tell if one tire has a leak...simple.
Safety Car
Joined: Jan 2001
Posts: 4,386
Likes: 689
From: Boise ID
The purpose of the TPMS system is to tell the driver when a tire has a leak because the leak can't be seen visually with the runflat tires. As such, it really doesn't matter if some sensors are a couple of pounds off of what a handheld gauge says. Use a good gauge to fill the tires, then use the DIC readings to tell if one tire has a leak...simple.
The manual states to use a good quality pressure gauge to check pressure and the TPMS to monitor pressure. Maybe that's what the M means 
Pro
Joined: Feb 2016
Posts: 745
Likes: 192
From: Olympia WA
St. Jude Donor '16-'17, '19
Tire Guage Resource
http://www.tenbestreview.com/automot...tire-pressure/
FWIW... I use the one shown as #1 and have had very accurate results over the years. And, you can find them online at what I believe are very reasonable prices.
FWIW... I use the one shown as #1 and have had very accurate results over the years. And, you can find them online at what I believe are very reasonable prices.
Thread Starter
Burning Brakes
Joined: Oct 2015
Posts: 922
Likes: 109
From: Crowley Texas
http://www.tenbestreview.com/automot...tire-pressure/
FWIW... I use the one shown as #1 and have had very accurate results over the years. And, you can find them online at what I believe are very reasonable prices.
FWIW... I use the one shown as #1 and have had very accurate results over the years. And, you can find them online at what I believe are very reasonable prices.
Team Owner
Joined: Mar 2008
Posts: 21,502
Likes: 461
From: Southern Utah
Thread Starter
Burning Brakes
Joined: Oct 2015
Posts: 922
Likes: 109
From: Crowley Texas
Idrove it about 20 miles back from Discount Tire after putting new tires on. This was Friday. Then drove about 1 mile to a car show Saturday. I will check again when I take the cover off later this week
Team Owner
Joined: Jun 2005
Posts: 46,295
Likes: 2,596
From: Northern, VA
St. Jude Donor '15
"In honor of jpee"
Personally, I have about eight of the old pencil gauges, and two relatively inexpensive digital gauges. Just for kicks, I tried all of them (weird
). They were all w/in 1 psi of the DIC reading. I doubt if it's the age of the TPMS on the car, but it could be. 