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Rain Sensor Function Test

WARNING: This page is about a different car, the 2010 Porsche Cayenne, 2009 Porsche Cayenne, and 2008 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: Moving components
  • Danger of limbs being trapped or severed

→ Do not reach into the danger area.

→ Secure the system to prevent it from being activated accidentally.

→ Keep third parties away from the danger area.

  1. Lock the vehicle and unlock it again.
  2. Switch on the ignition and set the pot. on the wiper switch for the windscreen wiper to the lowest position.
  3. Set the wiper switch to position 1 and then move the pot. one position higher on each occasion. Actuation of the rain sensor is confirmed by one wiping stroke.
  4. Switch the ignition on and put the wiper switch in position 1, moisten your finger with water, and move it over the area of the rain sensor on the outside of the windscreen. The wiper switches on.
  5. Connect Porsche System Tester. Select the Wiper menu and read out fault memory.
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