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Indicator, Visual Collision Warning

Fig 1: Identifying Visual Collision Warning Indicator
GLL152814Courtesy of VOLVO CARS CORPORATION

Indicator, visual collision warning consists of 12 LEDs in three groups. The LEDS are directly connected to the Forward Sensing Module (FSM).

The indicator is used to visually warn the driver of an imminent collision, in order to minimize the effects of or prevent a collision. The visual collision warning indicator is located on the top edge of the dashboard on the driver's side.

The Forward Sensing Module (FSM) controls the light intensity at the visual collision warning indicator via pulse width modulation. The three groups of LEDs are separately connected to the Forward Sensing Module (FSM), this means that the Forward Sensing Module (FSM) can control each group of LEDs individually.

The indicator has an internal temperature sensor. The task of the temperature sensor is to protects the electronics. At temperatures above 100 °C / 212 °F the indicator does not light the LEDs when the Forward Sensing Module (FSM) requests it. When this has occurred, the Forward Sensing Module (FSM) prevents the indicator from being lit for a further 10 minutes.