P Metric
With the P-Metric system, Section Width is measured in millimeters.
To convert millimeters into inches, divide by 25.4. The Aspect Ratio (Section Height divided by Section Width) helps provide more dimensional information about the tire size.
Example:

(1) P = Certain tire type used on light duty vehicles such as passenger
cars
(2) Section Width in millimeters
(3) Aspect Ratio (= section height 7 section width).
(4) R = Radial Construction
(5) Rim diameter in inches
See also:
System setup
You can select the following menus only
by operating the “TUNE/TRACK/CH” dial. ...
Service mode
In service mode, the remote start function is temporarily disabled to prevent the system from unexpectedly starting the engine while being serviced. ...
Ventilation
To force outside air through the instrument panel outlets:
1. Set the air inlet selection button to the OFF position.
2. Press the “” button.
3. Set the temperature control dial all the way left.
...
