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W220 s320 2000 soft close boot works but all 4 doors don't

1232 Views 10 Replies 6 Participants Last post by  cowboyt
Pump working fine and boot lid working perfectly but all 4 doors don't even try, even after unplugging power supply to re set, wondering if computer has cut signal to it and if so will it need to be re set with the star system or anyone else had a similar problem? Thanks, Peter
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First, figure out WHY the computer cut power to those circuits....resetting the pump over and over is a great way to burn up the pump. The pump protects itself from burn out by shutting down those circuits that take an excessive time to actuate. The excessive time means there is a leak, or failed actuator, on that circuit. These circuits have hard plastic vacuum lines that become brittle with age, and actuators with plastic parts and diaphragms that become brittle. If you’re asking me to guess which lines or actuators broke in your case, that’s difficult to do over the Internet.... you’re going to have to get a vacuum gauge, a hand pump, and start chasing down each circuit...
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