Re: [MBZ] 124 central locking system fun
That's good to know Dan, maybe I can fix this pump then. - Max Charleston SC On Thu, Mar 12, 2020 at 1:34 PM dan--- via Mercedes wrote: > Yeah, that’s one of the “smart” pumps. They can be opened and serviced. No > electronics to speak of if they like the W140 and W210 versions, but some > contacts that can be adjusted to control state change (pressure/vacuum) and > high/low pressure/vacuum thresholds. > > Lots of info on BW on these as I recall. > > -D > > > On Mar 12, 2020, at 12:02 PM, Meade Dillon via Mercedes < > mercedes@okiebenz.com> wrote: > > > > Looks like this pump was common to all the 124 cars as well as others. > > > > > https://www.programainc.com/item_detail.aspx?idproduct=107=0=124%20800%2021%2048 > > > > I've got the pump from Wilton's sedan, should be able to swap that in and > > have an answer. > > - > > Max > > Charleston SC > > > > > > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 124 central locking system fun
Yeah, that’s one of the “smart” pumps. They can be opened and serviced. No electronics to speak of if they like the W140 and W210 versions, but some contacts that can be adjusted to control state change (pressure/vacuum) and high/low pressure/vacuum thresholds. Lots of info on BW on these as I recall. -D > On Mar 12, 2020, at 12:02 PM, Meade Dillon via Mercedes > wrote: > > Looks like this pump was common to all the 124 cars as well as others. > > https://www.programainc.com/item_detail.aspx?idproduct=107=0=124%20800%2021%2048 > > I've got the pump from Wilton's sedan, should be able to swap that in and > have an answer. > - > Max > Charleston SC > > > On Thu, Mar 12, 2020 at 11:09 AM dan--- via Mercedes > wrote: > >> Are the pumps on the late W124s a separate unit like PSE pumps on later >> models, or the “dumb” kind like the “football” found in W126 models? >> >> I ask because the “dumb” pumps don’t have any logic, just a pressure >> actuated snap switch that reverses rotation, changing from vacuum to >> pressure and vice-versa. If the pressure switch fails the pump is more or >> less junk. >> >> -D >> >> On Mar 12, 2020, at 10:35 AM, Jim Cathey via Mercedes < >> mercedes@okiebenz.com> wrote: >> ...the CLS control circuit, which ... is integral to the pump, is the >> faulty component. >>> >>> Yes, if the signal from the door lock is indeed correct, it is. At this >> point diving into the >>> pump can't hurt. My first suspicion would be bad solder joints, but >> re-capping too while >>> you're there couldn't hurt. Meanwhile, try to scare up another pump in >> case the operation >>> is not successful. >>> >>> -- Jim >>> >>> >>> ___ >>> http://www.okiebenz.com >>> >>> To search list archives http://www.okiebenz.com/archive/ >>> >>> To Unsubscribe or change delivery options go to: >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >> >> >> ___ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> >> > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 124 central locking system fun
Looks like this pump was common to all the 124 cars as well as others. https://www.programainc.com/item_detail.aspx?idproduct=107=0=124%20800%2021%2048 I've got the pump from Wilton's sedan, should be able to swap that in and have an answer. - Max Charleston SC On Thu, Mar 12, 2020 at 11:09 AM dan--- via Mercedes wrote: > Are the pumps on the late W124s a separate unit like PSE pumps on later > models, or the “dumb” kind like the “football” found in W126 models? > > I ask because the “dumb” pumps don’t have any logic, just a pressure > actuated snap switch that reverses rotation, changing from vacuum to > pressure and vice-versa. If the pressure switch fails the pump is more or > less junk. > > -D > > On Mar 12, 2020, at 10:35 AM, Jim Cathey via Mercedes < > mercedes@okiebenz.com> wrote: > > >> ...the CLS control circuit, which ... is integral to the pump, is the > faulty component. > > > > Yes, if the signal from the door lock is indeed correct, it is. At this > point diving into the > > pump can't hurt. My first suspicion would be bad solder joints, but > re-capping too while > > you're there couldn't hurt. Meanwhile, try to scare up another pump in > case the operation > > is not successful. > > > > -- Jim > > > > > > ___ > > http://www.okiebenz.com > > > > To search list archives http://www.okiebenz.com/archive/ > > > > To Unsubscribe or change delivery options go to: > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 124 central locking system fun
There was an early Hella 126 pump that was quite stupid, but I've only ever seen one of those. As one might expect, the diaphragm on the snap switch failed. The later pumps are bidirectional motor/pumps, with electronics. Far fewer moving parts. -- Jim ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 124 central locking system fun
Don't know the answer to that, I'm speculating now. I've got some research to do about which pumps are shared and which are unique. - Max Charleston SC On Thu, Mar 12, 2020 at 11:09 AM dan--- via Mercedes wrote: > Are the pumps on the late W124s a separate unit like PSE pumps on later > models, or the “dumb” kind like the “football” found in W126 models? > > I ask because the “dumb” pumps don’t have any logic, just a pressure > actuated snap switch that reverses rotation, changing from vacuum to > pressure and vice-versa. If the pressure switch fails the pump is more or > less junk. > > -D > > On Mar 12, 2020, at 10:35 AM, Jim Cathey via Mercedes < > mercedes@okiebenz.com> wrote: > > >> ...the CLS control circuit, which ... is integral to the pump, is the > faulty component. > > > > Yes, if the signal from the door lock is indeed correct, it is. At this > point diving into the > > pump can't hurt. My first suspicion would be bad solder joints, but > re-capping too while > > you're there couldn't hurt. Meanwhile, try to scare up another pump in > case the operation > > is not successful. > > > > -- Jim > > > > > > ___ > > http://www.okiebenz.com > > > > To search list archives http://www.okiebenz.com/archive/ > > > > To Unsubscribe or change delivery options go to: > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 124 central locking system fun
Are the pumps on the late W124s a separate unit like PSE pumps on later models, or the “dumb” kind like the “football” found in W126 models? I ask because the “dumb” pumps don’t have any logic, just a pressure actuated snap switch that reverses rotation, changing from vacuum to pressure and vice-versa. If the pressure switch fails the pump is more or less junk. -D On Mar 12, 2020, at 10:35 AM, Jim Cathey via Mercedes wrote: >> ...the CLS control circuit, which ... is integral to the pump, is the faulty >> component. > > Yes, if the signal from the door lock is indeed correct, it is. At this > point diving into the > pump can't hurt. My first suspicion would be bad solder joints, but > re-capping too while > you're there couldn't hurt. Meanwhile, try to scare up another pump in case > the operation > is not successful. > > -- Jim > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 124 central locking system fun
> ...the CLS control circuit, which ... is integral to the pump, is the faulty > component. Yes, if the signal from the door lock is indeed correct, it is. At this point diving into the pump can't hurt. My first suspicion would be bad solder joints, but re-capping too while you're there couldn't hurt. Meanwhile, try to scare up another pump in case the operation is not successful. -- Jim ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
[MBZ] 124 central locking system fun
Last night I had some time to diagnose the central locking system (CLS) on the '94 E320 wagon that Floyd helped me "rescue" a couple months ago. The LF door lock, when turned with the key to lock or unlock, would physically lock that door, but no activation of the CLS. The RF door, upon locking, would activate the CLS but just cycle to lock and then immediately back to unlock state. The tailgate would lock and then go into a loop of locking and unlocking and locking. I tested the signals that each door lock is sending to the CLS pump 'brain', and indeed each lock is sending the correct ground or power signal. I can only conclude that the CLS control circuit, which I suspect is integral to the pump, is the faulty component. Maybe a re-cap is in order? - Max Charleston SC ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
