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#1
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PSE Pump/Central Locking Problem
I have a 92 400SE W140 that yesterday the Central Locking System stopped working. I first checked the fuses in the rear of the car and discovered the fuse (F4 # 9 20amp) had blown. What is interesting F4 # 9 specifically controls the “closing assist” function while F4 #3 fuse controls central locking, closing assist, and the PSE control module. I replaced the blow fuse and the central locking system worked for a few minutes before the fuse burned out again. I could hear the PSE pump under the rear seat running when I attempted to activate the central locking system. I replaced the blow fuse again (F4 # 9) but now the PSE pump does not run. I you attempt to use the Central Locking System, you will only hear a single, faint click noise coming from the PSE pump – no motor running. The door and trunk Closing Assist work fine, but none of the PSE controlled modules work.
Since the PSE only makes a faint, single click noise, is the PSE blown and needs to be replaced? Does anyone know why the fuse was blown on F4#3 for closing assist when the PSE pump (PSE is controlled by F4 #9) is not controlled by this fuse? I also checked the vacuum lines that connect to the PSE pump and all connecting lines with the exception of 3 will hold a vacuum without loosing pressure. Do you think these 3 lines caused the PSE pump to fail due to overwork? |
#2
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I can tell you that the vacuum pump in question has a rather high failure rate. It's definitely a big seller.
Ron http://germanstar.net |
#3
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I just went to get gas and the fuel door is locked in the close position because the PSE pump has quit. I'm unsure of which vacuum hose ( + or - ) pressure applied will relase the fuel door. As you can imagine, I'm really starting to get frustrated with the 400SE!@@
Is removing the rear seats and appling (vacuum or pressure) my only option to open the fuel door? |
#4
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Does anyone know the "replacement" part number for the PSE pump listed above in the picture? I was told the part has been replaced with a newer "universal" pump. Is this true?
Thanks for any feedback. |
#5
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fuel door
I think there is a pull (handle) on the assembly to retract it from the trunk. I also belive it is the extra yellow line from the pump, that also controls the gas door and the trunk handle, the other yellow controls lock/onlock on the doors. I was under the opinion there is a universal replacement pump with a separate distributor plate which can be adapted for you needs.
Last edited by Peter Guenther; 09-16-2003 at 04:10 PM. |
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