User's Manual

spare tire, the 3-digit 7-segment section will show nothing and the backlighting will turn off after one
minute.
There is no over-pressure alert available if the reference value is 430 kPa or above.
1.3.5.5 Tire temperature alert
If one or more tires are reporting a temperature in excess of 85°C (185°F), the system must alert the
driver. A 3 Step Indication procedure will be used to highlight this condition:
Step 1. The “High Temperature” and “Pressure Warning” icon will be shown and the icon of the
corresponding tire will blink for 90 seconds and beep at the same frequency (1 Hz) for 15 seconds. The
driver must be able turn off the beeping whenever he pushes the button.
Step 2. The “High Temperature” and “Pressure Warning” icon will be shown and the icon of the
corresponding tire will blink only with doubled frequency (2 Hz) for 90 seconds and beep at the same
frequency for 15 seconds. The driver must be able turn off the beeping whenever he pushes the button.
Step 3. The “High Temperature” and “Pressure Warning” icon will be shown and the icon of the
corresponding tire will blink at a doubled frequency again (4 Hz) and beep at the same frequency for
15 seconds. The driver must be able turn off the beeping whenever he pushes the button.
Step 3 will be repeated continuously until the condition is improved (a normal or warning condition has
been met).
Tire temperature alert displayed:
(European version: red; US version: yellow)
During the alert, the numeric field must display the temperature of the tire and the pressure of the
respective tire, cycling for two seconds each. If more than one tire is affected, the system will cycle
through the affected tires, displaying each tire information for 2 seconds while reducing the blinking
rate of the tires not displayed to 0.5Hz.