Re: [MBZ] '91 350SDL air cond
Sounds like you got it! I'll bring up my '95 next so you can trouble-shoot the oil sensor... -Max -Original Message- From: mercedes-boun...@okiebenz.com [mailto:mercedes-boun...@okiebenz.com] On Behalf Of WILTON Sent: Monday, August 30, 2010 6:36 PM To: Mercedes Discussion List Subject: Re: [MBZ] '91 350SDL air cond 'Think I just found my aux fans culprit. 'Shorted across terminals on top of coolant temp. SWITCH, and the fans work! 'Had been trying only the temp. sensor right beside the switch on the thermostat housing. Call to Rusty coming up tomorrow. Wilton - Original Message - From: Angelo Giaimo michaelangel...@gmail.com To: mercedes@okiebenz.com Sent: Saturday, August 28, 2010 11:10 PM Subject: Re: [MBZ] '91 350SDL air cond On my '90 350SDL with aux fans that won't kick in and an erratic temp guage, (goes from 85 to pegged @ 120+, and back again), a slight tap at the top of the dashboard above the gauge will cause it to jump, so we figured the guage it intermittent. Even hit the block with a laser thermometer by the sensor , engine is cooling as it should. IIRC, there are 2 separate sensors, one for the gauge, which we replaced, thinking the sensor was intermittent. The other goes to the ACC unit. Don't remember if the sensor or the relay replacement caused the fans to start working again, but I know we did not replace the ACC PBU. YMMV. Got 4 cans of R-12 left. Only enough for 1 re-charge after I find where my leak is. ;-( Angelo ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
THanks Jim. http://userweb.windwireless.net/~jimc/mamerepairs.html#klimatest Jump pins 5 and 7 in the klima relay socket. See the above link for the diagram. Jim be da MAN! Anyone else got the magic for jumping the Klima? Jim? All on this itty-bitty card: http://userweb.windwireless.net/~jimc/mamerepairs.html -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Again, it's only the aux fans that don't work automatically; compressor works fine, and fans will run when straight wired or aux fan relays are jumpered; no power at high press switch by dryer. Wilton - Original Message - From: Dieselhead 126die...@gmail.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Sunday, August 29, 2010 10:36 PM Subject: Re: [MBZ] '91 350SDL air cond That should be it. I will try to pull mine tomorrow and i think by looking at it, I can tell you which terminals to jump. Anyone else got the magic for jumping the Klima? Jim? The small black box about 2+ by 1+ between the two firewalls and just to left of center? Says KL1? Wilton - Original Message - From: Dieselhead 126die...@gmail.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Sunday, August 29, 2010 9:57 PM Subject: Re: [MBZ] '91 350SDL air cond I believe all the originals said KLIMA but I have seen some that don't say KLIMA, but have a K, and I think I have seen at least one that says nothing. it is on the left side, between the front and rear firewalls. I can't remember where [Klima] is. Can somebody remind me? My notes say that it's next to the fuse box. Mine all say D-Klima on them, as I recall. Notes say SDL's Klima part number is 001 545 80 05. -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Compressor works fine; aux fans don't work automatically. Wilton - Original Message - From: Alex Chamberlain apchamberl...@gmail.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Monday, August 30, 2010 1:28 AM Subject: Re: [MBZ] '91 350SDL air cond On Sun, Aug 29, 2010 at 7:36 PM, Dieselhead 126die...@gmail.com wrote: Anyone else got the magic for jumping the Klima? Jim? It is in the 124 FSM, file 83-605.pdf. According to the Model Year 1986 Model 126 Supplement which Steve Nervig helpfully included in his 126 FSM index, the test procedure for the Klima is exactly the same between 124 and '86-on 126. If you follow the whole procedure you can test all the input and output signals at the pins of the Klima socket (and, therefore, of course, deduce, if necessary, that it is faulty, if all the inputs and outputs are correct but your compressor still isn't turning on when it should). Along the way you get to test the A/C pressure switches, the fan switch, and the compressor speed sensor, if I recall correctly. I've emailed the file directly to Wilton. Alex ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Thanks! Wilton - Original Message - From: Jim Cathey j...@windwireless.net To: Mercedes Discussion List mercedes@okiebenz.com Sent: Monday, August 30, 2010 1:27 AM Subject: Re: [MBZ] '91 350SDL air cond Anyone else got the magic for jumping the Klima? Jim? All on this itty-bitty card: http://userweb.windwireless.net/~jimc/mamerepairs.html -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
'Think I just found my aux fans culprit. 'Shorted across terminals on top of coolant temp. SWITCH, and the fans work! 'Had been trying only the temp. sensor right beside the switch on the thermostat housing. Call to Rusty coming up tomorrow. Wilton - Original Message - From: Angelo Giaimo michaelangel...@gmail.com To: mercedes@okiebenz.com Sent: Saturday, August 28, 2010 11:10 PM Subject: Re: [MBZ] '91 350SDL air cond On my '90 350SDL with aux fans that won't kick in and an erratic temp guage, (goes from 85 to pegged @ 120+, and back again), a slight tap at the top of the dashboard above the gauge will cause it to jump, so we figured the guage it intermittent. Even hit the block with a laser thermometer by the sensor , engine is cooling as it should. IIRC, there are 2 separate sensors, one for the gauge, which we replaced, thinking the sensor was intermittent. The other goes to the ACC unit. Don't remember if the sensor or the relay replacement caused the fans to start working again, but I know we did not replace the ACC PBU. YMMV. Got 4 cans of R-12 left. Only enough for 1 re-charge after I find where my leak is. ;-( Angelo ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
My first thought, too, but all other gages are normal and I couldn't get the gage to change by banging on it. 'Course, it ain't over yet, either. Wilton - Original Message - From: OK Don okd...@gmail.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, August 28, 2010 11:38 PM Subject: Re: [MBZ] '91 350SDL air cond Sounds like it might be a loose/corroded ground connection - I'd check/clean those before blaming the gauge --- On Sat, Aug 28, 2010 at 10:10 PM, Angelo Giaimo michaelangel...@gmail.comwrote: On my '90 350SDL with aux fans that won't kick in and an erratic temp guage, (goes from 85 to pegged @ 120+, and back again), a slight tap at the top of the dashboard above the gauge will cause it to jump, so we figured the guage it intermittent. OK Don 2001 ML320 1992 300D 2.5T 1990 300D 2.5T 1997 Plymouth Grand Voyager ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
'Could have sworn I replaced KLIMA on this car 10 or 12 years ago. Now I can't remember where it is. Can somebody remind me? Is it the black box 'bout 2 X 1 1/4 labeled KL1 immediately behind forward firewall and left of center? Wilton - Original Message - From: OK Don okd...@gmail.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, August 28, 2010 11:38 PM Subject: Re: [MBZ] '91 350SDL air cond Sounds like it might be a loose/corroded ground connection - I'd check/clean those before blaming the gauge --- On Sat, Aug 28, 2010 at 10:10 PM, Angelo Giaimo michaelangel...@gmail.comwrote: On my '90 350SDL with aux fans that won't kick in and an erratic temp guage, (goes from 85 to pegged @ 120+, and back again), a slight tap at the top of the dashboard above the gauge will cause it to jump, so we figured the guage it intermittent. OK Don 2001 ML320 1992 300D 2.5T 1990 300D 2.5T 1997 Plymouth Grand Voyager ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
I can't remember where [Klima] is. Can somebody remind me? My notes say that it's next to the fuse box. Mine all say D-Klima on them, as I recall. Notes say SDL's Klima part number is 001 545 80 05. -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
You can pull the KLIMA relay and jump two terminals there to determine if a faulty Klima is the problem.. I can't remember the terminals, but if you have a wiring diagram, you should be able to figger it out. Power for the low pressure switch goes through the KLIMA from the PBCU -- if you don't have power there, it's the PBCU. High pressure switch for the fan probably does not, but I'm not sure on the 350 SDL -- if it's the W14o, it could be anything since it's got a digital system rather than an analog one for ACC. Peter ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
I believe all the originals said KLIMA but I have seen some that don't say KLIMA, but have a K, and I think I have seen at least one that says nothing. it is on the left side, between the front and rear firewalls. I can't remember where [Klima] is. Can somebody remind me? My notes say that it's next to the fuse box. Mine all say D-Klima on them, as I recall. Notes say SDL's Klima part number is 001 545 80 05. -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
I think that's OVP near the fuse box; 'has clear plastic top with spade type fuse in the top. Wilton - Original Message - From: Jim Cathey j...@windwireless.net To: Mercedes Discussion List mercedes@okiebenz.com Sent: Sunday, August 29, 2010 8:10 PM Subject: Re: [MBZ] '91 350SDL air cond I can't remember where [Klima] is. Can somebody remind me? My notes say that it's next to the fuse box. Mine all say D-Klima on them, as I recall. Notes say SDL's Klima part number is 001 545 80 05. -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
The small black box about 2+ by 1+ between the two firewalls and just to left of center? Says KL1? Wilton - Original Message - From: Dieselhead 126die...@gmail.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Sunday, August 29, 2010 9:57 PM Subject: Re: [MBZ] '91 350SDL air cond I believe all the originals said KLIMA but I have seen some that don't say KLIMA, but have a K, and I think I have seen at least one that says nothing. it is on the left side, between the front and rear firewalls. I can't remember where [Klima] is. Can somebody remind me? My notes say that it's next to the fuse box. Mine all say D-Klima on them, as I recall. Notes say SDL's Klima part number is 001 545 80 05. -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
That should be it. I will try to pull mine tomorrow and i think by looking at it, I can tell you which terminals to jump. Anyone else got the magic for jumping the Klima? Jim? The small black box about 2+ by 1+ between the two firewalls and just to left of center? Says KL1? Wilton - Original Message - From: Dieselhead 126die...@gmail.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Sunday, August 29, 2010 9:57 PM Subject: Re: [MBZ] '91 350SDL air cond I believe all the originals said KLIMA but I have seen some that don't say KLIMA, but have a K, and I think I have seen at least one that says nothing. it is on the left side, between the front and rear firewalls. I can't remember where [Klima] is. Can somebody remind me? My notes say that it's next to the fuse box. Mine all say D-Klima on them, as I recall. Notes say SDL's Klima part number is 001 545 80 05. -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Anyone else got the magic for jumping the Klima? Jim? All on this itty-bitty card: http://userweb.windwireless.net/~jimc/mamerepairs.html -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
On Sun, Aug 29, 2010 at 7:36 PM, Dieselhead 126die...@gmail.com wrote: Anyone else got the magic for jumping the Klima? Jim? It is in the 124 FSM, file 83-605.pdf. According to the Model Year 1986 Model 126 Supplement which Steve Nervig helpfully included in his 126 FSM index, the test procedure for the Klima is exactly the same between 124 and '86-on 126. If you follow the whole procedure you can test all the input and output signals at the pins of the Klima socket (and, therefore, of course, deduce, if necessary, that it is faulty, if all the inputs and outputs are correct but your compressor still isn't turning on when it should). Along the way you get to test the A/C pressure switches, the fan switch, and the compressor speed sensor, if I recall correctly. I've emailed the file directly to Wilton. Alex ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
On Sun, Aug 29, 2010 at 10:27 PM, Jim Cathey j...@windwireless.net wrote: Anyone else got the magic for jumping the Klima? Jim? All on this itty-bitty card: http://userweb.windwireless.net/~jimc/mamerepairs.html Whoops, Jim's way ahead of me. Very neat work there, Dr. Cathey. A bit easier to follow than the multi-page flowcharts in the FSM. Alex ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Just for curiosity: Wilton did your SDL come out of the factory with R12 or 134a? Well, maybe I should have said, ---leaking at the expansion valve. : Wilton - Original Message - From: Dillon, Meade M CIV SPAWARSYSCEN-ATLANTIC,53310 meade.m.dil...@navy.mil To: Mercedes Discussion List mercedes@okiebenz.com Sent: Friday, August 27, 2010 6:22 PM Subject: Re: [MBZ] '91 350SDL air cond Leaking valve, or leaking o-rings? Should be 4 at that expansion valve. While you've got the system open, replace as many o-rings as you can and put off more leaks for another 10 years... -Max From: mercedes-boun...@okiebenz.com on behalf of WILTON Sent: Fri 8/27/2010 5:00 PM To: mercedes list Subject: [MBZ] '91 350SDL air cond Well, seems that I have a leaking air cond. expansion valve in the 350SDL again; orig replaced 'bout 10 years ago. Leak at exp valve detected with flame detector; system has dye now; we'll check for more leaks again in few days. Additionally, aux fans don't run, 'cept with 12V applied directly to lead to motors. Evidently fans should come on at ~300 psi (20bar); air cond tech said pressure was ~350psi. Fuses 1 and 5 are good and 12V pwr is sitting at downstream side of fuses. Shorting across leads to pressure switch at dryer does nothing. Where are relays K9 and K10 (aux. fan relays); evidently in fuse/relay box at left rear corner of engine compartment, but which ones? Ideas, tips? TIA BTW, 'placed order with Rusty few days ago for air filters and ant. fender seal (rcvd today); had waited several days to place order, thinking I'd notice/find the need to order something else; nothing else came up; even said to Rusty, Now that I've called to order, something else will likely come up in a day or two. Well, sho nuff. Wilton ___ http://www.okiebenz.com http://www.okiebenz.com/ For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
R12; still has R12. BTW, 'beginning to suspect engine coolant temp sensor for the aux fan prob; coolant temp gage has been erratic for 4 or 5 days, at least; SWMBO told me about it; don't really know how long it had been erratic before she told me. All other gages read normally. Reconfirms why I need to drive that car coupla times a week. Gonna try to reach the sensor this morning for test. Wilton - Original Message - From: Dieselhead 126die...@gmail.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, August 28, 2010 9:32 AM Subject: Re: [MBZ] '91 350SDL air cond Just for curiosity: Wilton did your SDL come out of the factory with R12 or 134a? Well, maybe I should have said, ---leaking at the expansion valve. : Wilton - Original Message - From: Dillon, Meade M CIV SPAWARSYSCEN-ATLANTIC,53310 meade.m.dil...@navy.mil To: Mercedes Discussion List mercedes@okiebenz.com Sent: Friday, August 27, 2010 6:22 PM Subject: Re: [MBZ] '91 350SDL air cond Leaking valve, or leaking o-rings? Should be 4 at that expansion valve. While you've got the system open, replace as many o-rings as you can and put off more leaks for another 10 years... -Max From: mercedes-boun...@okiebenz.com on behalf of WILTON Sent: Fri 8/27/2010 5:00 PM To: mercedes list Subject: [MBZ] '91 350SDL air cond Well, seems that I have a leaking air cond. expansion valve in the 350SDL again; orig replaced 'bout 10 years ago. Leak at exp valve detected with flame detector; system has dye now; we'll check for more leaks again in few days. Additionally, aux fans don't run, 'cept with 12V applied directly to lead to motors. Evidently fans should come on at ~300 psi (20bar); air cond tech said pressure was ~350psi. Fuses 1 and 5 are good and 12V pwr is sitting at downstream side of fuses. Shorting across leads to pressure switch at dryer does nothing. Where are relays K9 and K10 (aux. fan relays); evidently in fuse/relay box at left rear corner of engine compartment, but which ones? Ideas, tips? TIA BTW, 'placed order with Rusty few days ago for air filters and ant. fender seal (rcvd today); had waited several days to place order, thinking I'd notice/find the need to order something else; nothing else came up; even said to Rusty, Now that I've called to order, something else will likely come up in a day or two. Well, sho nuff. Wilton ___ http://www.okiebenz.com http://www.okiebenz.com/ For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Just found engine temp sensor; not as hard to access as I was afraid it would be! 'Sticking right up on top of thermostat housing right by fuel filter at left front corner of engine. I'll run it after a while and see what the fans do with coolant temp sensor disconnected. Wilton - Original Message - From: WILTON wilt...@nc.rr.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, August 28, 2010 10:15 AM Subject: Re: [MBZ] '91 350SDL air cond R12; still has R12. BTW, 'beginning to suspect engine coolant temp sensor for the aux fan prob; coolant temp gage has been erratic for 4 or 5 days, at least; SWMBO told me about it; don't really know how long it had been erratic before she told me. All other gages read normally. Reconfirms why I need to drive that car coupla times a week. Gonna try to reach the sensor this morning for test. Wilton - Original Message - From: Dieselhead 126die...@gmail.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, August 28, 2010 9:32 AM Subject: Re: [MBZ] '91 350SDL air cond Just for curiosity: Wilton did your SDL come out of the factory with R12 or 134a? Well, maybe I should have said, ---leaking at the expansion valve. : Wilton - Original Message - From: Dillon, Meade M CIV SPAWARSYSCEN-ATLANTIC,53310 meade.m.dil...@navy.mil To: Mercedes Discussion List mercedes@okiebenz.com Sent: Friday, August 27, 2010 6:22 PM Subject: Re: [MBZ] '91 350SDL air cond Leaking valve, or leaking o-rings? Should be 4 at that expansion valve. While you've got the system open, replace as many o-rings as you can and put off more leaks for another 10 years... -Max From: mercedes-boun...@okiebenz.com on behalf of WILTON Sent: Fri 8/27/2010 5:00 PM To: mercedes list Subject: [MBZ] '91 350SDL air cond Well, seems that I have a leaking air cond. expansion valve in the 350SDL again; orig replaced 'bout 10 years ago. Leak at exp valve detected with flame detector; system has dye now; we'll check for more leaks again in few days. Additionally, aux fans don't run, 'cept with 12V applied directly to lead to motors. Evidently fans should come on at ~300 psi (20bar); air cond tech said pressure was ~350psi. Fuses 1 and 5 are good and 12V pwr is sitting at downstream side of fuses. Shorting across leads to pressure switch at dryer does nothing. Where are relays K9 and K10 (aux. fan relays); evidently in fuse/relay box at left rear corner of engine compartment, but which ones? Ideas, tips? TIA BTW, 'placed order with Rusty few days ago for air filters and ant. fender seal (rcvd today); had waited several days to place order, thinking I'd notice/find the need to order something else; nothing else came up; even said to Rusty, Now that I've called to order, something else will likely come up in a day or two. Well, sho nuff. Wilton ___ http://www.okiebenz.com http://www.okiebenz.com/ For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
I think the temp gauge sensor and the fan temp actuated sensor are separate --- On Sat, Aug 28, 2010 at 9:51 AM, WILTON wilt...@nc.rr.com wrote: Just found engine temp sensor; not as hard to access as I was afraid it would be! 'Sticking right up on top of thermostat housing right by fuel filter at left front corner of engine. I'll run it after a while and see what the fans do with coolant temp sensor disconnected. Wilton - Original Message - From: WILTON wilt...@nc.rr.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, August 28, 2010 10:15 AM Subject: Re: [MBZ] '91 350SDL air cond R12; still has R12. BTW, 'beginning to suspect engine coolant temp sensor for the aux fan prob; coolant temp gage has been erratic for 4 or 5 days, at least; SWMBO told me about it; don't really know how long it had been erratic before she told me. All other gages read normally. Reconfirms why I need to drive that car coupla times a week. Gonna try to reach the sensor this morning for test. Wilton OK Don 2001 ML320 1992 300D 2.5T 1990 300D 2.5T 1997 Plymouth Grand Voyager ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Yes, they are, but engine coolant temp sensor may also have some effect on aux fan control system according to the wiring diagram here in my hand. Even if it doesn't, engine temp gage has been very erratic for few days; 'gotta solve that, too, and again, according to diag. I'm looking at, it may have some effect on fan control system. Look at page 128 (AUX FAN) of the 90/91 350SDL CD and help me understand the dashed line between the coolant temp circuit and the aux fan circuit at the ACC control unit. Aux fan relays checked good when power is applied directly (on bench), but I have no power in either wire at high press sw at dryer. Fans run when jumpered at K9 terminals and when power is applied directly to fan wires at dryer. Fans do NOT run when high press and high temp terminals at dryer are jumpered/shorted. There is NO POWER in any of the wires at the press/temp switches. BTW, yes, fuses F1 and F5 were the first thing I checked and changed, and I have power sitting at relay terminals 30 and 85. So, does the coolant temp sensor have some effect on aux fan operation via the ACC control, or not? 'Seems I need coolant temp sensor, anyway, for the terribly erratic temp gage; for example, gage sits pegged at bottom 'til engine is at op. temp; then gage jumps to 85 and sometimes jumping to 110+, etc. Coincidence with aux fan prob? I need clearer understanding of dashed lines between coolant temp sensor circuit and aux fan circuit at ACC page 128. Wilton - Original Message - From: OK Don okd...@gmail.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, August 28, 2010 7:48 PM Subject: Re: [MBZ] '91 350SDL air cond I think the temp gauge sensor and the fan temp actuated sensor are separate --- On Sat, Aug 28, 2010 at 9:51 AM, WILTON wilt...@nc.rr.com wrote: Just found engine temp sensor; not as hard to access as I was afraid it would be! 'Sticking right up on top of thermostat housing right by fuel filter at left front corner of engine. I'll run it after a while and see what the fans do with coolant temp sensor disconnected. Wilton - Original Message - From: WILTON wilt...@nc.rr.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, August 28, 2010 10:15 AM Subject: Re: [MBZ] '91 350SDL air cond R12; still has R12. BTW, 'beginning to suspect engine coolant temp sensor for the aux fan prob; coolant temp gage has been erratic for 4 or 5 days, at least; SWMBO told me about it; don't really know how long it had been erratic before she told me. All other gages read normally. Reconfirms why I need to drive that car coupla times a week. Gonna try to reach the sensor this morning for test. Wilton OK Don 2001 ML320 1992 300D 2.5T 1990 300D 2.5T 1997 Plymouth Grand Voyager ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Check your KLIMA relay. Peter ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
I hate those dashed lines - the magic happens here - Yes, sounds like you are on the right track, might as well replace that sensor. Sounds like the ACC brain reads that sensor as well as everything else. Peter is probably onto something with the KLIMA relay suggestion. On Sat, Aug 28, 2010 at 8:33 PM, WILTON wilt...@nc.rr.com wrote: Yes, they are, but engine coolant temp sensor may also have some effect on aux fan control system according to the wiring diagram here in my hand. Even if it doesn't, engine temp gage has been very erratic for few days; 'gotta solve that, too, and again, according to diag. I'm looking at, it may have some effect on fan control system. Look at page 128 (AUX FAN) of the 90/91 350SDL CD and help me understand the dashed line between the coolant temp circuit and the aux fan circuit at the ACC control unit. Aux fan relays checked good when power is applied directly (on bench), but I have no power in either wire at high press sw at dryer. Fans run when jumpered at K9 terminals and when power is applied directly to fan wires at dryer. Fans do NOT run when high press and high temp terminals at dryer are jumpered/shorted. There is NO POWER in any of the wires at the press/temp switches. BTW, yes, fuses F1 and F5 were the first thing I checked and changed, and I have power sitting at relay terminals 30 and 85. So, does the coolant temp sensor have some effect on aux fan operation via the ACC control, or not? 'Seems I need coolant temp sensor, anyway, for the terribly erratic temp gage; for example, gage sits pegged at bottom 'til engine is at op. temp; then gage jumps to 85 and sometimes jumping to 110+, etc. Coincidence with aux fan prob? I need clearer understanding of dashed lines between coolant temp sensor circuit and aux fan circuit at ACC page 128. Wilton OK Don 2001 ML320 1992 300D 2.5T 1990 300D 2.5T 1997 Plymouth Grand Voyager ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Power for the low pressure switch goes through the KLIMA from the PBCU -- if you don't have power there, it's the PBCU. High pressure switch for the fan probably does not, but I'm not sure on the 350 SDL -- if it's the W14o, it could be anything since it's got a digital system rather than an analog one for ACC. Peter ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Oh, the dashed lines indicate wires/in the same connector/plug. Checking other wiring diagrams, I find that operation of aux fans seems to be very much affected by engine coolant temp via the ACC control, especially in AUTO; 'don't think I had it out of AUTO with the coolant temp up when I was messing with it today; hafta try that tomorrow. AUTO, or not, may not make any difference. I think that, if the engine coolant sensor can't'/doesn't sense temp properly, the ACC may not know that the temp is high enough to send power to aux fan relays via the temp switch. Wilton - Original Message - From: WILTON wilt...@nc.rr.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, August 28, 2010 9:33 PM Subject: Re: [MBZ] '91 350SDL air cond Yes, they are, but engine coolant temp sensor may also have some effect on aux fan control system according to the wiring diagram here in my hand. Even if it doesn't, engine temp gage has been very erratic for few days; 'gotta solve that, too, and again, according to diag. I'm looking at, it may have some effect on fan control system. Look at page 128 (AUX FAN) of the 90/91 350SDL CD and help me understand the dashed line between the coolant temp circuit and the aux fan circuit at the ACC control unit. Aux fan relays checked good when power is applied directly (on bench), but I have no power in either wire at high press sw at dryer. Fans run when jumpered at K9 terminals and when power is applied directly to fan wires at dryer. Fans do NOT run when high press and high temp terminals at dryer are jumpered/shorted. There is NO POWER in any of the wires at the press/temp switches. BTW, yes, fuses F1 and F5 were the first thing I checked and changed, and I have power sitting at relay terminals 30 and 85. So, does the coolant temp sensor have some effect on aux fan operation via the ACC control, or not? 'Seems I need coolant temp sensor, anyway, for the terribly erratic temp gage; for example, gage sits pegged at bottom 'til engine is at op. temp; then gage jumps to 85 and sometimes jumping to 110+, etc. Coincidence with aux fan prob? I need clearer understanding of dashed lines between coolant temp sensor circuit and aux fan circuit at ACC page 128. Wilton - Original Message - From: OK Don okd...@gmail.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, August 28, 2010 7:48 PM Subject: Re: [MBZ] '91 350SDL air cond I think the temp gauge sensor and the fan temp actuated sensor are separate --- On Sat, Aug 28, 2010 at 9:51 AM, WILTON wilt...@nc.rr.com wrote: Just found engine temp sensor; not as hard to access as I was afraid it would be! 'Sticking right up on top of thermostat housing right by fuel filter at left front corner of engine. I'll run it after a while and see what the fans do with coolant temp sensor disconnected. Wilton - Original Message - From: WILTON wilt...@nc.rr.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, August 28, 2010 10:15 AM Subject: Re: [MBZ] '91 350SDL air cond R12; still has R12. BTW, 'beginning to suspect engine coolant temp sensor for the aux fan prob; coolant temp gage has been erratic for 4 or 5 days, at least; SWMBO told me about it; don't really know how long it had been erratic before she told me. All other gages read normally. Reconfirms why I need to drive that car coupla times a week. Gonna try to reach the sensor this morning for test. Wilton OK Don 2001 ML320 1992 300D 2.5T 1990 300D 2.5T 1997 Plymouth Grand Voyager ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Oh, yes, thanks! Wilton - Original Message - From: Peter Frederick psf...@earthlink.net To: Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, August 28, 2010 10:14 PM Subject: Re: [MBZ] '91 350SDL air cond Check your KLIMA relay. Peter ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
From my experience with the ML - if the compresosr is on, the aux fans need to be running, or the R12 pressure will get too high, and turn of the compressor. I don't think the temp sensor is going to be your answer (for the AC). I'm betting on Peter - it's likely the KLIMA or PPU. On Sat, Aug 28, 2010 at 9:35 PM, WILTON wilt...@nc.rr.com wrote: Oh, the dashed lines indicate wires/in the same connector/plug. Checking other wiring diagrams, I find that operation of aux fans seems to be very much affected by engine coolant temp via the ACC control, especially in AUTO; 'don't think I had it out of AUTO with the coolant temp up when I was messing with it today; hafta try that tomorrow. AUTO, or not, may not make any difference. I think that, if the engine coolant sensor can't'/doesn't sense temp properly, the ACC may not know that the temp is high enough to send power to aux fan relays via the temp switch. Wilton OK Don 2001 ML320 1992 300D 2.5T 1990 300D 2.5T 1997 Plymouth Grand Voyager ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Translate PB in PBCU; my brain is hung-up. Thanks. Wilton - Original Message - From: Peter Frederick psf...@earthlink.net To: Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, August 28, 2010 10:30 PM Subject: Re: [MBZ] '91 350SDL air cond Power for the low pressure switch goes through the KLIMA from the PBCU -- if you don't have power there, it's the PBCU. High pressure switch for the fan probably does not, but I'm not sure on the 350 SDL -- if it's the W14o, it could be anything since it's got a digital system rather than an analog one for ACC. Peter ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
PPU? Wilton - Original Message - From: OK Don okd...@gmail.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, August 28, 2010 10:39 PM Subject: Re: [MBZ] '91 350SDL air cond From my experience with the ML - if the compresosr is on, the aux fans need to be running, or the R12 pressure will get too high, and turn of the compressor. I don't think the temp sensor is going to be your answer (for the AC). I'm betting on Peter - it's likely the KLIMA or PPU. On Sat, Aug 28, 2010 at 9:35 PM, WILTON wilt...@nc.rr.com wrote: Oh, the dashed lines indicate wires/in the same connector/plug. Checking other wiring diagrams, I find that operation of aux fans seems to be very much affected by engine coolant temp via the ACC control, especially in AUTO; 'don't think I had it out of AUTO with the coolant temp up when I was messing with it today; hafta try that tomorrow. AUTO, or not, may not make any difference. I think that, if the engine coolant sensor can't'/doesn't sense temp properly, the ACC may not know that the temp is high enough to send power to aux fan relays via the temp switch. Wilton OK Don 2001 ML320 1992 300D 2.5T 1990 300D 2.5T 1997 Plymouth Grand Voyager ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Push Button Control Unit. Peter ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Supposed to be Push Button Unit -- On Sat, Aug 28, 2010 at 9:47 PM, WILTON wilt...@nc.rr.com wrote: PPU? Wilton - Original Message - From: OK Don okd...@gmail.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, August 28, 2010 10:39 PM Subject: Re: [MBZ] '91 350SDL air cond From my experience with the ML - if the compresosr is on, the aux fans need to be running, or the R12 pressure will get too high, and turn of the compressor. I don't think the temp sensor is going to be your answer (for the AC). I'm betting on Peter - it's likely the KLIMA or PPU. On Sat, Aug 28, 2010 at 9:35 PM, WILTON wilt...@nc.rr.com wrote: Oh, the dashed lines indicate wires/in the same connector/plug. Checking other wiring diagrams, I find that operation of aux fans seems to be very much affected by engine coolant temp via the ACC control, especially in AUTO; 'don't think I had it out of AUTO with the coolant temp up when I was messing with it today; hafta try that tomorrow. AUTO, or not, may not make any difference. I think that, if the engine coolant sensor can't'/doesn't sense temp properly, the ACC may not know that the temp is high enough to send power to aux fan relays via the temp switch. Wilton OK Don 2001 ML320 1992 300D 2.5T 1990 300D 2.5T 1997 Plymouth Grand Voyager ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- OK Don 2001 ML320 1992 300D 2.5T 1990 300D 2.5T 1997 Plymouth Grand Voyager ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
On my '90 350SDL with aux fans that won't kick in and an erratic temp guage, (goes from 85 to pegged @ 120+, and back again), a slight tap at the top of the dashboard above the gauge will cause it to jump, so we figured the guage it intermittent. Even hit the block with a laser thermometer by the sensor , engine is cooling as it should. IIRC, there are 2 separate sensors, one for the gauge, which we replaced, thinking the sensor was intermittent. The other goes to the ACC unit. Don't remember if the sensor or the relay replacement caused the fans to start working again, but I know we did not replace the ACC PBU. YMMV. Got 4 cans of R-12 left. Only enough for 1 re-charge after I find where my leak is. ;-( Angelo ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Of course! Thanks. Wilton - Original Message - From: Peter Frederick psf...@earthlink.net To: Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, August 28, 2010 10:49 PM Subject: Re: [MBZ] '91 350SDL air cond Push Button Control Unit. Peter ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Yes. Thanks. Wilton - Original Message - From: OK Don okd...@gmail.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, August 28, 2010 10:52 PM Subject: Re: [MBZ] '91 350SDL air cond Supposed to be Push Button Unit -- On Sat, Aug 28, 2010 at 9:47 PM, WILTON wilt...@nc.rr.com wrote: PPU? Wilton - Original Message - From: OK Don okd...@gmail.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Saturday, August 28, 2010 10:39 PM Subject: Re: [MBZ] '91 350SDL air cond From my experience with the ML - if the compresosr is on, the aux fans need to be running, or the R12 pressure will get too high, and turn of the compressor. I don't think the temp sensor is going to be your answer (for the AC). I'm betting on Peter - it's likely the KLIMA or PPU. On Sat, Aug 28, 2010 at 9:35 PM, WILTON wilt...@nc.rr.com wrote: Oh, the dashed lines indicate wires/in the same connector/plug. Checking other wiring diagrams, I find that operation of aux fans seems to be very much affected by engine coolant temp via the ACC control, especially in AUTO; 'don't think I had it out of AUTO with the coolant temp up when I was messing with it today; hafta try that tomorrow. AUTO, or not, may not make any difference. I think that, if the engine coolant sensor can't'/doesn't sense temp properly, the ACC may not know that the temp is high enough to send power to aux fan relays via the temp switch. Wilton OK Don 2001 ML320 1992 300D 2.5T 1990 300D 2.5T 1997 Plymouth Grand Voyager ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- OK Don 2001 ML320 1992 300D 2.5T 1990 300D 2.5T 1997 Plymouth Grand Voyager ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Thanks. Good luck with the leak. Found leak at my expansion valve so far. Wilton - Original Message - From: Angelo Giaimo michaelangel...@gmail.com To: mercedes@okiebenz.com Sent: Saturday, August 28, 2010 11:10 PM Subject: Re: [MBZ] '91 350SDL air cond On my '90 350SDL with aux fans that won't kick in and an erratic temp guage, (goes from 85 to pegged @ 120+, and back again), a slight tap at the top of the dashboard above the gauge will cause it to jump, so we figured the guage it intermittent. Even hit the block with a laser thermometer by the sensor , engine is cooling as it should. IIRC, there are 2 separate sensors, one for the gauge, which we replaced, thinking the sensor was intermittent. The other goes to the ACC unit. Don't remember if the sensor or the relay replacement caused the fans to start working again, but I know we did not replace the ACC PBU. YMMV. Got 4 cans of R-12 left. Only enough for 1 re-charge after I find where my leak is. ;-( Angelo ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Sounds like it might be a loose/corroded ground connection - I'd check/clean those before blaming the gauge --- On Sat, Aug 28, 2010 at 10:10 PM, Angelo Giaimo michaelangel...@gmail.comwrote: On my '90 350SDL with aux fans that won't kick in and an erratic temp guage, (goes from 85 to pegged @ 120+, and back again), a slight tap at the top of the dashboard above the gauge will cause it to jump, so we figured the guage it intermittent. OK Don 2001 ML320 1992 300D 2.5T 1990 300D 2.5T 1997 Plymouth Grand Voyager ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
'Think I've found the aux fan relays, labeled C and D, at left rear corner of fuse/relay box. Wilton - Original Message - From: WILTON wilt...@nc.rr.com To: mercedes list mercedes@okiebenz.com Sent: Friday, August 27, 2010 5:00 PM Subject: [MBZ] '91 350SDL air cond Well, seems that I have a leaking air cond. expansion valve in the 350SDL again; orig replaced 'bout 10 years ago. Leak at exp valve detected with flame detector; system has dye now; we'll check for more leaks again in few days. Additionally, aux fans don't run, 'cept with 12V applied directly to lead to motors. Evidently fans should come on at ~300 psi (20bar); air cond tech said pressure was ~350psi. Fuses 1 and 5 are good and 12V pwr is sitting at downstream side of fuses. Shorting across leads to pressure switch at dryer does nothing. Where are relays K9 and K10 (aux. fan relays); evidently in fuse/relay box at left rear corner of engine compartment, but which ones? Ideas, tips? TIA BTW, 'placed order with Rusty few days ago for air filters and ant. fender seal (rcvd today); had waited several days to place order, thinking I'd notice/find the need to order something else; nothing else came up; even said to Rusty, Now that I've called to order, something else will likely come up in a day or two. Well, sho nuff. Wilton ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Not that it's likely to do me much good - yet. ; Wilton - Original Message - From: WILTON wilt...@nc.rr.com To: Mercedes Discussion List mercedes@okiebenz.com Sent: Friday, August 27, 2010 5:14 PM Subject: Re: [MBZ] '91 350SDL air cond 'Think I've found the aux fan relays, labeled C and D, at left rear corner of fuse/relay box. Wilton - Original Message - From: WILTON wilt...@nc.rr.com To: mercedes list mercedes@okiebenz.com Sent: Friday, August 27, 2010 5:00 PM Subject: [MBZ] '91 350SDL air cond Well, seems that I have a leaking air cond. expansion valve in the 350SDL again; orig replaced 'bout 10 years ago. Leak at exp valve detected with flame detector; system has dye now; we'll check for more leaks again in few days. Additionally, aux fans don't run, 'cept with 12V applied directly to lead to motors. Evidently fans should come on at ~300 psi (20bar); air cond tech said pressure was ~350psi. Fuses 1 and 5 are good and 12V pwr is sitting at downstream side of fuses. Shorting across leads to pressure switch at dryer does nothing. Where are relays K9 and K10 (aux. fan relays); evidently in fuse/relay box at left rear corner of engine compartment, but which ones? Ideas, tips? TIA BTW, 'placed order with Rusty few days ago for air filters and ant. fender seal (rcvd today); had waited several days to place order, thinking I'd notice/find the need to order something else; nothing else came up; even said to Rusty, Now that I've called to order, something else will likely come up in a day or two. Well, sho nuff. Wilton ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Leaking valve, or leaking o-rings? Should be 4 at that expansion valve. While you've got the system open, replace as many o-rings as you can and put off more leaks for another 10 years... -Max From: mercedes-boun...@okiebenz.com on behalf of WILTON Sent: Fri 8/27/2010 5:00 PM To: mercedes list Subject: [MBZ] '91 350SDL air cond Well, seems that I have a leaking air cond. expansion valve in the 350SDL again; orig replaced 'bout 10 years ago. Leak at exp valve detected with flame detector; system has dye now; we'll check for more leaks again in few days. Additionally, aux fans don't run, 'cept with 12V applied directly to lead to motors. Evidently fans should come on at ~300 psi (20bar); air cond tech said pressure was ~350psi. Fuses 1 and 5 are good and 12V pwr is sitting at downstream side of fuses. Shorting across leads to pressure switch at dryer does nothing. Where are relays K9 and K10 (aux. fan relays); evidently in fuse/relay box at left rear corner of engine compartment, but which ones? Ideas, tips? TIA BTW, 'placed order with Rusty few days ago for air filters and ant. fender seal (rcvd today); had waited several days to place order, thinking I'd notice/find the need to order something else; nothing else came up; even said to Rusty, Now that I've called to order, something else will likely come up in a day or two. Well, sho nuff. Wilton ___ http://www.okiebenz.com http://www.okiebenz.com/ For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] '91 350SDL air cond
Well, maybe I should have said, ---leaking at the expansion valve. : Wilton - Original Message - From: Dillon, Meade M CIV SPAWARSYSCEN-ATLANTIC,53310 meade.m.dil...@navy.mil To: Mercedes Discussion List mercedes@okiebenz.com Sent: Friday, August 27, 2010 6:22 PM Subject: Re: [MBZ] '91 350SDL air cond Leaking valve, or leaking o-rings? Should be 4 at that expansion valve. While you've got the system open, replace as many o-rings as you can and put off more leaks for another 10 years... -Max From: mercedes-boun...@okiebenz.com on behalf of WILTON Sent: Fri 8/27/2010 5:00 PM To: mercedes list Subject: [MBZ] '91 350SDL air cond Well, seems that I have a leaking air cond. expansion valve in the 350SDL again; orig replaced 'bout 10 years ago. Leak at exp valve detected with flame detector; system has dye now; we'll check for more leaks again in few days. Additionally, aux fans don't run, 'cept with 12V applied directly to lead to motors. Evidently fans should come on at ~300 psi (20bar); air cond tech said pressure was ~350psi. Fuses 1 and 5 are good and 12V pwr is sitting at downstream side of fuses. Shorting across leads to pressure switch at dryer does nothing. Where are relays K9 and K10 (aux. fan relays); evidently in fuse/relay box at left rear corner of engine compartment, but which ones? Ideas, tips? TIA BTW, 'placed order with Rusty few days ago for air filters and ant. fender seal (rcvd today); had waited several days to place order, thinking I'd notice/find the need to order something else; nothing else came up; even said to Rusty, Now that I've called to order, something else will likely come up in a day or two. Well, sho nuff. Wilton ___ http://www.okiebenz.com http://www.okiebenz.com/ For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
