Circuit/System Description

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.

The Adding Washer Fluid message is controlled by the instrument cluster. This message is controlled by using a signal message input from the washer fluid level switch. The washer fluid level signal circuit is supplied voltage through a resistor then monitored within the instrument cluster. The washer fluid level switch is normally closed when the washer fluid level is full. The instrument cluster detects ignition voltage on the washer fluid level signal circuit. When the washer fluid reaches the point where the driver should be informed that the washer fluid is low, the washer fluid level switch opens. When the washer fluid level switch is opened, the washer fluid level signal circuit voltage is pulled high, and the instrument cluster displays the Adding Washer Fluid message on the driver information center. In order to prevent the Adding Washer Fluid message from being displayed while sloshing is occurring in the washer fluid container, the instrument cluster is programed with a 1 min delay before changing states of the Adding Washer Fluid message during an ignition cycle.