Quote:
Originally Posted by locry
Help!!!... I just realized that my dad's s280's central locking pump keeps activating in 20 sec or so intervals... locked or unlocked... though nothing actually happens... locks stay as they are... backup antenas stay as they are and even the trunk latch mechanism stay put... they DO WORK properly when triggered... i just hear the pump running under the passenger rear seat... i confirmed it was the pump because the pump was hot.
can a small vacuum leak cause this? does the entire vac system need to maintain a certain pressure or lack thereof? coz if it does then it should be a simple vacuum leak... on the other hand... if it doesn't maintain a certain pressure, what could be activating it?
thanks guys
|
how is the climate control system? some of the cars use the pse pump(central locking pump) to supplement vacuum to the climate control system when engine vacuum is low, usually it comes on, but should not as frequently as you describe.
what i have seen cause it to act the way yours is usually happens when there is a leaking vacuum control servo in the dash, look at your pump vacuum connections and see if there is a clear vacuum line going to it, usually the supplemental vacuum hose is clear or light in color, i have usually cut the line and plugged both ends and see if this stops the pump from running so often, if it does stop it, keep in mind this is a temporary fix and the leak needs to be properly identified an corrected. and if it is let go the pump will eventually burn up,