Central Electronic Module (CEM) (2000-2004): Lighting: Wash/Wipe
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
If rear window washing is used for shorter time than 350 ms, a wiper stroke (impulse function) is performed, which cancels the interval function.
For rear window wiper, the wiper performs three strokes after washing. The windshield wipers perform two strokes, followed by an extra stroke.
Washer functions front and rear are not synchronized.
The rear window washer is activated when reversing if the windshield wiper is engaged and reverse gear is selected. The rear window wiper does not have to be activated.