User's Manual

1.3.5.4 Over Pressure alert
If one or more tires’ sensors are reporting a pressure that exceeds 125% of the preset reference pressure
or the tire type specific maximum pressure (Table 1), the system must alert the driver. A 3 Step
Indication procedure will be used to highlight this condition:
Step 1. The “Over Pressure Alarm” 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 “Over Pressure Alarm” 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 “Over Pressure Alarm” 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).
During this whole period, the 3-digit 7-segment section will show the current pressure of this tire.
If more than one tires are reporting an over-pressure, the system must display each affected tire’s
pressure for 2 seconds and reduce the blinking of the tire indicator for the other tires to a rate of 0.5Hz.
Over pressure alert displayed:
(European version: red; US version: yellow)
Whenever this condition applies to the spare tire, the “Over Pressure Alarm” icon will be shown and
the corresponding icon will blink and beep in the same frequency (1 Hz) for 15 seconds showing the
corresponding pressure (only once when ignition is turned on). When all other tires are ok and
therefore the corresponding icons are shown continuously, the icon for the spare tire will keep on
blinking and the “Over Pressure Alarm” icon will be shown. In spite of the incorrect pressure of the