I put the summer tires on today, drove the block to get the sensors synced with the Tpms system and on shutting down the car I brought up the typical info pressures screen, or so I thought, only to not see the typical 4wheel +- display but one that specified pressures for front and rear tires.

Anyone know how to purposely get to that screen? I was unable to get back there no matter what I tried.

Hidden display (how do you get this display up other than by freak accident)?




Normal display (what I'm used to seeing)

 

I don't normally see either of those. I usually get the actual pressure in each wheel.

 

You must take it for a ride. As the tires warm up they send the report and it will populate the screen

 

On the 997.2 that display is found by pulling downward on the Onboard Computer (BC) lever (it is the lever just below the turn indicator). You can return to previous setting by pulling the BC lever toward you. This is not the same as selecting the BC modes such as TPM i.e. see number 4 in diagram below. Other modes you can see when pulling down are distance to empty, mpg, audio selection and maybe a few others that I forget right now. BTW, once you pull down the lever and see the actual tire pressure display, you can simply push the lever and go into TPM as long as the vehicle is stationary, and then select the delta pressure display. Hope this helps.

 

Okay I've played around and worked out how you do it.

Normally the display shows the current tyre pressures. Push the lower left lever away from you and select TPC using up and down movements and push away again to select TPC. You'll now get a choice of options. "Info Pressure" will show the difference in pressure between what you should have and what you actually have (+/-). There are other options to select load (partial/full) and tyre type (summer/winter). The one of interest is "Set". Select this then chose the tyre type such as summer. You'll need to select "continue" and it'll report the process is complete. The red exclamation mark and yellow TPMS warning lights will illuminate. If you now select "Info Pressure" it'll be displaying the required front and rear pressures which is the display you were seeing. If you get out of the on board computer menus the main tyre pressure display will now be displaying "--" for each tyre and no units. This had me worried for a while but after 5 mins it once again showed the actual pressures and the warning lights went out.

John

 

Ah-ha. I'll have to try that sequence. I wonder if you can set the reference pressures when you have that front/rear reference screen up.

1) Select 'different tyre type' - this causes the computer to want to relearn (I assume. and not that I also had to get the other tires (ie other set of sensors ) on the car).
2) Then go to the info-pressures screen, and rather than getting the usual info on pressures, you get the reference pressures.

I've validated the process, and it works. After you select new tires, the 'info pressures' screen, rather than showing the measured pressures, shows the reference pressures (though you cannot change the values). Once the car has calibrated the TPMS again, at some point, you no longer get that reference settings screen but get the traditional 4 pressures readout.