Snow Mode

Snow Mode

When the windshield is covered with snow, the wiping action produces wedges of snow at the upper and lower limits of the wipers. These wedges of snow can sometimes block the wipers.

To avoid blocking protection, the wiping area is reduced slightly. The wiper area is reduced within the limits of visual safety.

The wiper system enters snow mode when an increased load is detected in the lower or upper area of the windshield. This prevents the wiper from overheating and cutting out when snow wedges at the edge of the wiping range make it extremely difficult for the wipers to move.

Snow mode is identified based on the following parameters:

- Wiper arm speed
- PWM voltage (increase in current needed to maintain current wiper speed).

In snow mode, the wiper control continuously tries to increase the wiper range until normal operation is restored.