Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 12-22-2009, 08:24 PM
Registered User
 
Join Date: Mar 2009
Location: San Diego
Posts: 2,978
Question 300D will not shut off unless I blocked this line

There is a thread here on car won't shut off and the problem may be similar to mine. My 300D will not shut off unless I unplug the green line and block the vacuum source. The green line goes to the ignition switch somewhere.

I have this problem for a while but I just procrastinate. I will try to fix it over the holiday period. Where does the green line connected to? What is faulty?

The picture shows the vacuum line. Your help is appreciated.

Attached Thumbnails
300D will not shut off unless I blocked this line-300d-vacuum.jpg  
__________________
Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

2 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.

Last edited by ah-kay; 12-22-2009 at 08:29 PM. Reason: typo
Reply With Quote
  #2  
Old 12-22-2009, 09:07 PM
aaa aaa is offline
Registered User
 
Join Date: Nov 2008
Posts: 1,075
Well, it's one of three things: door locks, ignition switch, climate control. The door locks appear to be plugged in according to your picture (it pass thru that splitter valve thingy first), and the ignition switch has to be plugged in otherwise it wouldn't be shutting off.

That leaves the climate control. Nice little pink vacuum pods scattered all over under the dash, for controlling air vents. Maybe if you remove the kickpanels you can reach some of them for testing. You can also get to some by removing the glovebox.
Reply With Quote
  #3  
Old 12-22-2009, 09:08 PM
ImBroke's Avatar
Diesel way of Life
 
Join Date: Jun 2004
Location: Cleveland, NY
Posts: 2,215
The green line goes to your climate control. Probably one of the pods is leaking.
__________________
05 Mustang GT Vert (3) 101k
12 TSX Wagon Tech (66k) (93k)
03 CL Type S manual (157k) 163k
06 Subaru Outback base (135k) 153k
95 Del Sol (93k) 290k
93 Stealth ES (167k) 169k
18 Silverado 2500 LTZ Midnight (212) 4700
90 350SDL 253k

http://mefi.us/images/fuelly/sig-us/86307.png
Reply With Quote
  #4  
Old 12-22-2009, 09:18 PM
MBeige's Avatar
Registered User
 
Join Date: Apr 2005
Location: SoCal
Posts: 3,746
Quote:
Originally Posted by ImBroke View Post
The green line goes to your climate control. Probably one of the pods is leaking.
Agreed.
Reply With Quote
  #5  
Old 12-22-2009, 09:21 PM
Registered User
 
Join Date: Mar 2009
Location: San Diego
Posts: 2,978
Quote:
Originally Posted by aaa View Post
Well, it's one of three things: door locks, ignition switch, climate control. The door locks appear to be plugged in according to your picture (it pass thru that splitter valve thingy first), and the ignition switch has to be plugged in otherwise it wouldn't be shutting off.

That leaves the climate control. Nice little pink vacuum pods scattered all over under the dash, for controlling air vents. Maybe if you remove the kickpanels you can reach some of them for testing. You can also get to some by removing the glovebox.
It is not the door because all the doors can be locked/unlocked OK with the line plugged. Climate control, may be but A/C and heat seems to be OK. When I 'T'ed a Mityvac to the green line ( car not running and line has vacuum ) and I switched the ignition switch to 1 or 2 ( cannot remember ) then the vacuum is gone. That was why I unplugged the green line and managed to fix it.

Does it indicate the ignition switch? How easy it is to fix? What does it entail?

Thanks.
__________________
Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

2 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.
Reply With Quote
  #6  
Old 12-22-2009, 09:43 PM
aaa aaa is offline
Registered User
 
Join Date: Nov 2008
Posts: 1,075
It's the climate control. All about the vents, and opening/closing them according to the buttons. So do the defrost vents block off air when it's not turned on? Do the center vents open when they're supposed to? Etc.
Reply With Quote
  #7  
Old 12-22-2009, 09:47 PM
Registered User
 
Join Date: Mar 2009
Location: San Diego
Posts: 2,978
aaa. Thanks.

I will try to remove the dash underside panel and take a look. I am not sure about the defrost or center vent as I do not take much notice to them.
__________________
Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

2 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.
Reply With Quote
  #8  
Old 12-22-2009, 10:17 PM
aaa aaa is offline
Registered User
 
Join Date: Nov 2008
Posts: 1,075
There's a guide on the wiki:

http://www.peachparts.com/Wikka/W123HVACVacuumActuators

I'm not sure how accessible the vacuum tubes are but if you can get to the right ones easily you'd be able to narrow down which side of the car has the bad pod, as opposed to testing every pod.
Reply With Quote
  #9  
Old 12-23-2009, 08:04 AM
snookwhaler's Avatar
Linesider
 
Join Date: Feb 2009
Location: Treasure Coast, FL
Posts: 1,417
Yep... Green is the ACC line. Pulling the drivers knee panel and the glove box will allow you to test most of "actuators". You can actually buy new diaphragms instead of replacing the entire actuator $$. There are also quite a few vacuum elbows in and under there that can be torn, cut or rotted. Some are a PITA to get to and are behind and below the center vents. More than likely that those are OK.

If you don't have a mighty vac yet.... Now would be the time to get one. The system is pretty easy to troubleshoot once you learn all the lines and where they go. I have become VERY familiar with it lately. But, I can say that "everything works".
__________________
AJ

1985 300D (SOLD)

Reply With Quote
  #10  
Old 02-27-2012, 02:12 AM
Registered User
 
Join Date: Mar 2009
Location: San Diego
Posts: 2,978
Get round to take a look at this problem and there is a tip or 2 I can share with the forum. The green line goes to the 5 control solenoids behind the Climate Control. It is a challenge to find out which one of the 5 pods is leaking. I find a quick way to do it.

1) Remove the 5 holding screws on the CCU faceplate. Move CCU aside but do not undo the 2 big plugs on either side.
2) T the Mityvac to the green line
3) Unplug ALL 5 connectors to the vacuum control solenoids.
4) Start the car and monitor the vacuum level, the level should be normal as all the vacuum solenoids are off ( not connected ).
5) Plug the connector back in one at a time. The vacuum would drop once the connector associated with the leaky pod is re-connected. You may need to vary the CCU setting to make sure the control solenoids are activated.
6) Optional - It is also possible to hook up 12v to the solenoid with a spare connector as the CCU setting may or may not energize the solenoid.
7) This method saves me a lot of time as the vacuum tube is a PITA to get to behind the CCU and I do not want to remove the glove box panel to test the pods.

I managed to locate solenoid number 1, the left-hand most one. The vacuum dropped once I re-connected the solenoid. It was so easy to identify the culprit. The pod is underneath the driver panel.

Any one can tell me what does #1 pod control?
__________________
Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

2 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.
Reply With Quote
  #11  
Old 02-27-2012, 06:50 PM
Yak Yak is offline
Registered User
 
Join Date: Aug 2009
Location: San Antonio, TX
Posts: 1,711
Quote:
Originally Posted by ah-kay View Post
Get round to take a look at this problem and there is a tip or 2 I can share with the forum. The green line goes to the 5 control solenoids behind the Climate Control. It is a challenge to find out which one of the 5 pods is leaking. I find a quick way to do it.

1) Remove the 5 holding screws on the CCU faceplate. Move CCU aside but do not undo the 2 big plugs on either side.
2) T the Mityvac to the green line
3) Unplug ALL 5 connectors to the vacuum control solenoids.
4) Start the car and monitor the vacuum level, the level should be normal as all the vacuum solenoids are off ( not connected ).
5) Plug the connector back in one at a time. The vacuum would drop once the connector associated with the leaky pod is re-connected. You may need to vary the CCU setting to make sure the control solenoids are activated.
6) Optional - It is also possible to hook up 12v to the solenoid with a spare connector as the CCU setting may or may not energize the solenoid.
7) This method saves me a lot of time as the vacuum tube is a PITA to get to behind the CCU and I do not want to remove the glove box panel to test the pods.

I managed to locate solenoid number 1, the left-hand most one. The vacuum dropped once I re-connected the solenoid. It was so easy to identify the culprit. The pod is underneath the driver panel.

Any one can tell me what does #1 pod control?
If by "underneath the driver panel" you mean just to the right of the driver's right foot, it's probably the defrost pod.

Or, it might even just be half of the defrost pod since there are two diaphragms in there. Or, just to confuse you, it might be the feed line from the center pod to the defrost pod since two lines actually go to that pod, but it is possible your diagnostics isolate the center+defrost line.

If it's the smaller pod in that area with one line, then it's the footwell flap actuator pod.

Scans of airflow for W123 climate control
Reply With Quote
  #12  
Old 02-27-2012, 07:14 PM
Registered User
 
Join Date: Mar 2009
Location: San Diego
Posts: 2,978
Quote:
Originally Posted by Yak View Post
If by "underneath the driver panel" you mean just to the right of the driver's right foot, it's probably the defrost pod.

Or, it might even just be half of the defrost pod since there are two diaphragms in there. Or, just to confuse you, it might be the feed line from the center pod to the defrost pod since two lines actually go to that pod, but it is possible your diagnostics isolate the center+defrost line.

If it's the smaller pod in that area with one line, then it's the footwell flap actuator pod.

Scans of airflow for W123 climate control
Thanks Yak.

It is the pink color Pod on the right of the gas pedal, the right foot. I have some time this week so I decide to take a look at the 2 years problem as the vacuum pods is a PITA to get to. I am quite pleased with myself as I do not need to remove the driver's or passenger's panel to locate the leaky pod. I removed the driver's side panel, plugged the vacuum hose going to the pod, reconnected the green hose and now the car shuts off OK. I will take a look at the pod, or half the pod, sometime, don't know when though. Will report back.

__________________
Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

2 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 05:43 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page