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Does anyone happen to know at what temperature the panel switches from cold to warm? The reason I ask is I’ve noticed the display says they are warm when I leave in the morning when it’s 45°. Another related question is; does traction control use the tire temperature in its calculations?
Tire temps are split into three categories: cold (below 45 degrees), warm (45-115 degrees) and hot (above 115 degrees). In "cold" mode ABS intervenes sooner and more progressively, while the differential is more aggressive to limit inside wheelspin. As temps increase, ABS control intervenes later and becomes more lenient, while differential locking ramps up more slowly.
Chevy uses the tire temperature data available through the C7's tire pressure sensors to more carefully control its ABS and electronic differential. Because the pressure sensors don't measure tire temperature directly (they actually measure the temperature of the TPMS sensor's microprocessor), it's not a perfect science.
The temperatures can be viewed if you have a PDR . Download the Cosworth Toolbox and load PDR video into the Cosworth software. The tire temperatures can be seen in the toolbox display screens.
Does anyone happen to know at what temperature the panel switches from cold to warm? The reason I ask is I’ve noticed the display says they are warm when I leave in the morning when it’s 45°. Another related question is; does traction control use the tire temperature in its calculations?
I was kinda wondering the same thing this weekend as I had the car parked outside during the day in sub-freezing temps and the display showed the tires were warm which is wrong.
Tire temps are split into three categories: cold (below 45 degrees), warm (45-115 degrees) and hot (above 115 degrees). In "cold" mode ABS intervenes sooner and more progressively, while the differential is more aggressive to limit inside wheelspin. As temps increase, ABS control intervenes later and becomes more lenient, while differential locking ramps up more slowly.
Chevy uses the tire temperature data available through the C7's tire pressure sensors to more carefully control its ABS and electronic differential. Because the pressure sensors don't measure tire temperature directly (they actually measure the temperature of the TPMS sensor's microprocessor), it's not a perfect science.
The temperatures can be viewed if you have a PDR . Download the Cosworth Toolbox and load PDR video into the Cosworth software. The tire temperatures can be seen in the toolbox display screens.
Tire temps are split into three categories: cold (below 45 degrees), warm (45-115 degrees) and hot (above 115 degrees). In "cold" mode ABS intervenes sooner and more progressively, while the differential is more aggressive to limit inside wheelspin. As temps increase, ABS control intervenes later and becomes more lenient, while differential locking ramps up more slowly.
Chevy uses the tire temperature data available through the C7's tire pressure sensors to more carefully control its ABS and electronic differential. Because the pressure sensors don't measure tire temperature directly (they actually measure the temperature of the TPMS sensor's microprocessor), it's not a perfect science.
The temperatures can be viewed if you have a PDR . Download the Cosworth Toolbox and load PDR video into the Cosworth software. The tire temperatures can be seen in the toolbox display screens.
They will also show frozen. Which shows up as white on the display. ('14)
I've only seen it once. 23 degrees on a trip. Augusta, GA, and the forecast was to drop from there, so I left before the front, and it took about a half hour to "warm" up. The temp dropped but the tires stayed ok according to the display. It got down to 9F. I stopped only long enough to pee or gas up, but not both at the same time.
It got back up to ~freezing but with blowing snow as I got a few hours from home, but the tires handled it just fine.
This was with PSS. No cracking or otherwise horrible behavior. I was very careful and cautious, however.
Someone else had posted that the definition of Frozen, Cold, Warm, and Hot; was changed during the C7 production run. You should be able find it here if you spend enough time with Advanced Search.
I don't know if the relationship between tire temp and nannies was supposed to change also, or just the words on the dash.
I had my radar detector powered from the OBD port for a while. Everything seemed to work fine except that the tire temp readouts were reading Warm even when the car had been parked overnight below freezing. I removed the radar detector power from the OBD port and everything went back to normal.
Here's what the dash showed at -12'F with everything working normally.
Last edited by Gearhead Jim; Nov 19, 2019 at 09:28 PM.
^^^
Not quite as bad as it looks, we had just left home in January of this year, on our ten day cruise to a couple of months in Arizona.
BTW, we have a set of the Michelin AS3+ tires, they were on the car when this pic was taken. The PSS were snug and warm in our basement.
I was kinda wondering the same thing this weekend as I had the car parked outside during the day in sub-freezing temps and the display showed the tires were warm which is wrong.
That's definitely odd as I've never even seen my tire temperature hit warm even in the summer. So far I have seen it say FROZEN, COLD, COOL and NORMAL but nothing beyond that.
Tire temperature
