SL/R230: PSE pump runtime at start-up
Thread Starter
Senior Member
Joined: Nov 2019
Posts: 347
Likes: 86
2005 SL65 AMG
PSE pump runtime at start-up
2005 SL65, my PSE pump runs for just over 90 seconds whenever the car is started. After that, I rarely hear it turn on again, if at all.
Is this normal?
Is this normal?
Super Member
Joined: May 2015
Posts: 606
Likes: 88
From: North Cali
2005 SL500, 2015 CLS400
I would say it's a little excessive run time... don't remember mine to run that long... the only reason I see is that you have a leak somewhere, the pump is running until goes in safe mode so it wouldn't break down from working nonstop. And when you stop and start the car again it resets the system...
Thread Starter
Senior Member
Joined: Nov 2019
Posts: 347
Likes: 86
2005 SL65 AMG
It’s my understanding that if there is a major leak, the pump will detect it and permanently stop trying to pressurize that circuit and the circuit will remain disabled until a reset is performed via SDS or the PSE fuse is taken out and then reinstalled.
If it was a minor leak, I would have expected to hear the pump keep kicking back on periodically while driving.
If it was a minor leak, I would have expected to hear the pump keep kicking back on periodically while driving.
Banned
Joined: Jan 2006
Posts: 1,982
Likes: 393
From: Atlanta, unfortunately
'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
Thread Starter
Senior Member
Joined: Nov 2019
Posts: 347
Likes: 86
2005 SL65 AMG
Ok so it’s not the PSE pump or the roof pump. What else in the trunk could be making a noise? The noise also happens when the engine is not running (but it lasts for a shorter time)
I think there is an aftermarket amp back there somewhere, wonder if it has a really loud fan or something?!
I think there is an aftermarket amp back there somewhere, wonder if it has a really loud fan or something?!
