X25

He is asking about sensor calibration; why do you guys keep referring to the learning process?

The calibration can be done AFAIK, and is necessary for cars in high elevation since TPMS only measures absolute pressure. It's actually not the calibration of the sensors themselves (they're measuring it right). What is calibrated is the 'offset' value to calculate the relative pressure. At high elevation, the outside pressure can be significantly lower.

p3pilot

Read post #10. He isn't asking about calibration.

jagamajajaran

Post #10 from the OP

BEZ06

Nope - no elevation correction is possible with our TPMS.

No "calibration" of the TPMS or Tire Pressure Sensors can be performed - what we got is what we got!!

.

gilbybarr

Wow....this got me confused. On my 2008 C6 I have gotten new tires/wheels and sensors from Discount Tire Direct....came to me mounted and balanced ready to go. At first I thought they had "mated" (for lack of better term) the new sensors to the car as it showed normal pressure....until I drove a few miles and the readout went to "service" on the readouts. I figured I had to take the car to a dealer to have them do to reset with a handheld device in front of each wheel to get the car to recognize the new sensors. Help me get unconfused guys! Tks.

Gary '09 C6

same question...is the TPMS re-learn procedure different on the C6 than the C7 ? OMs seems to indicate as such...

owc6

OK.

When changing tires, or replacing sensors, the C7 will learn the new tire positions after driving a bit (within 15 miles, but in much less, in my experience) unlike the C6 which had to have the car learn the new tire positions with a tool.

There is no known "calibration" for elevation offset.

Gary '09 C6

thanks, Lisa...

buckeye4

Exact same thing here.

BEZ06

Well....take a look at the info from my 2016 Service Manual in the picture below. If both sets of your wheels/tires have the same pressure, then it might appear that something is happening "instantly", but that's just not how it works!!

In the Service Manual info you can see that it says when the vehicle sits still the sensors go into a "Stationary" mode, and there are several references to 40 km/h (25 MPH) for 9 minutes - that's what is required for the sensors to go into the "Wake" mode then the "Drive" mode in order for them to send their data to the TPMS:

You can also see that if you put on a new set of wheels/tires with a different set of sensors, replace an individual sensor, swap wheels from side-to-side, etc., then you'll need to do the 25 MPH/9 min drive procedure:





.

Foosh

Thanks, that explains why I haven't noticed, and no action on my part has been necessary. After swapping tire sets, the first thing I do is my fun 30-minute loop on twisty country roads around my property.

Every time I've checked, the sensor readings have always exactly matched my tire pressure gauge readings.

BEZ06

When I swap from street to track wheels/tires/sensors, I have 30 psi in my street tires, and 26-28 psi in the ones for the track.

When I install the track wheels/tires/sensors, I set the DIC so it displays the tire pressures. It initially displays the 30 psi pressure of my street tires (maybe a little higher if I've been driving around and they've warmed up a bit), but after installing the track wheels and driving around for several minutes faster than 25 mph the much lower psi of my track tires starts to pop into the display.

If I've been doing any track prep where I've disconnected the battery, I'll have dashes for tire pressures until I drive around for several minutes, then the tire pressures start to pop into the display and replace the dashes.

I've never kept track of the time it takes, but it seems to me that it usually only takes 4 or 5 minutes instead of the Service Manual 9 minutes.

Next time you swap on a set of wheels with different sensors, pump the tires up to maybe 5 psi greater than the pressure of the tires on the car. Set the DIC to display your tire pressures and I think you'll see that they don't immediately display that higher pressure. Drive around faster than 25 mph for 9 minutes and watch the DIC display to see the higher pressure start to display. Then adjust to your normal tire pressure.

.

NOMRW8NG

You can put the TPMS into "learn" mode this way. With the engine running, the car at a standstill, and the tire pressures displayed, push and hold the SEL button on the right side of the steering wheel until the horn honks. Then drive and the system will quickly read whatever sensors you've mounted.

Foosh

Yes, but we've already established you don't need to do that. The car will read them automatically after just driving on new sensors for a few minutes.

Holster Maker

The C7's do exactly as above, usually in your long driveway or before. Love the new TPMS. Why do people think they still have C-6's or whatever TPMS's. One of the little reasons buying this C7.

NOMRW8NG

True, but as you say it can take a bit of time until the new sensors are recognized. So, if you want to speed up the process, you can use the learn procedure.

Foosh

I've never tried it, but perhaps the manual reset might save a few minutes. As noted in post #32, the manual states the auto reset happens within 9 minutes, but in actuality, it takes 4-5 minutes.

How long does the manual reset procedure take?

iclick

That's a good question, and one I researched almost nine years ago in quest of a pressure gauge with an accuracy guarantee. The only one I found was a calibration gauge that was designed to be used sparingly and mostly for checking other gauges--but it was too expensive for my budget. At that time I had several gauges and their readings varied by more than 3#, which IMO is unacceptable, but I used an average for an accuracy reference.

I ended up buying one (Accutire MS-4000) with a good reputation for accuracy and gives readouts in 0.5# increments. It jibed almost exactly with the TPMS in my C6, 2015 C7, and now 2017 C7. I still use the other gauges but etched the reading error on each one. The Accutire gauge is now my standard calibrating gauge even if it is off a fraction of a pound or so, as I'll never know for sure.

JerryU

Yep to meet ISO (an other) quality standards we had to have pressure gauges calibrated once a year. There are labs that do that for a living! They also calibrate torque wrenches, calipers etc to known standards.

That degree of accuracy is not needed for a car tire unless you're racing! Then repeatability more than "Dead ***** Accuracy" is the key, it's all relative. My $60 Jegs digital gauge (more $ now) that reads in tenths is what I have found works fine.

bsedwebt

I am looking to buy some new wheels and new TPMS sensors. I found several sets of 4 on Ebay with everything needed (caps, stems, units, etc,,,) for about $75 that say they are for the Corvette C7 but I have seen different Hz ratings - what rating am I looking for on a 2017 base Stingray?