w211 Intake manifold fault code

Zeppelin

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2003 W211 E320 CDI * 1982 W123 200E
I have an2006 E280 V6 Petrol, EML light comes on with the code -

0524 - Inlet flap circuit, open circuit or short circuit to ground.

I understand the manifolds suffer with broken plastic arms ect, we have not stripped it down so do not know if anything is broken yet. Can anyone shed light on the code above?
 

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Your fault code reader is describing a sensor or wiring fault BUT the main fault you get is the actuating rod snaps and that gives you a different fault code. So your reader might be misleading.
 

Botus

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Your fault code reader is describing a sensor or wiring fault BUT the main fault you get is the actuating rod snaps and that gives you a different fault code. So your reader might be misleading.


mine is doing this (tumble flaps), I checked everything still mechanically connected and all three vac units still intact
is there some electrical bit that commonly fails on the V8 petrol looks like 2 or 3 tiny units like to get involved ? Engine 273961

on mine that code (0524) says
short or open circuit in sensor lines / mechanical fault of one of the actuating lever / sensor faulty. replace sensor (P2005)

never read the last bit before !!! anyone know what P2005 is and if its common to play up?
 
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Personally, i would only go by a star fault code as other machines can be misleading.
 

Botus

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http://benzbits.com/m272/TumbleFlapActuatorSensor.pdf
http://benzbits.com/m272/TumbleFlapA...sorPicture.pdf
http://benzbits.com/m272/TumbleFlapA...nsorRemedy.pdf


Possible cause and remedy :
- Component B28/9 (Left intake manifold tumble flap position sensor) or component B28/10 (Right intake manifold
tumble flap position sensor) is faulty.
- Vacuum supply of component Y22/9 (Intake manifold tumble flap switchover valve) or the aneroid capsule for the
tumble flap
- Short or open circuit in position sensor B28/9 (Left intake manifold tumble flap position sensor) or B28/10 (Right
intake manifold tumble flap position sensor)
- Actuating lever for left or right tumble flap is worn out or broken.
 

Botus

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decided to take a look

It doesn't seem to have any split or cracked hoses
I think there are four vacuum operated actuators 1 is off down the front of the engine, 2 I can see go to the silly linkages on the manifold, the other I wasn't sure what it does.... (I'm not convinced my set up is like the picture I found. I have two small actuators next to each other.... ) the big picture would suggest its the main one and I can't verify yet if its linkage rod is OK.
The linkages on the smaller actuators are all intact and connected and you can move easily through full travel by pulling vacuum on the actuators
There are two weird beard electrical thingies. One 002 540 14 97 (in picture below) is clearly a part of this circuit, its a solenoid that works allowing it to pull air through a tiny filter which switches when it gets 12v other wise its closed. Off on a T piece another connection has a one way valve.
With the ignition on I get 8.8 v at the connection to this solenoid.
Close to the Tumble flaps is a second electrical thingy it connects via a vac pipe close to the front of the inlet manifold, it has a three wire connector and I guess measures inlet manifold vacuum.

Its possible but I don't think so, that the solenoid was sticky, putting 12v through it a few times and it switches nicely now
The 5mm air filter was a bit crudded up and its now clear.




98966d1327016375-2001-slk230-w-p0243-p0410-codes-still-cannot-fix-help-changeover-valve.jpg


however having found this not sure if I can see the middle actuator is actually OK without pulling off an air pump
226243d1326414644-intake-manifold-broken-m272-intake-components-swirl-flaps.jpg
 
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The actuating rod on 22/9 snaps.
 

Botus

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The actuating rod on 22/9 snaps.


took air pump off mine today so I can see what happening...
mine is NOT like the photo. I have one big & one small actuator that sits beside each other. All intact, linkages all move, no snapped rod, nothing stuck, vacuum bits working

odd
 

Botus

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so, only thing I found might have been wrong was the solenoid on vac pipes seemed stuck, with only 8.8v from the car and being 11 years old may be it wasn't moving and a good 12v and actuating a good few times helped.

after 12 months of constant fault " (0524) short or open circuit in sensor lines / mechanical fault of one of the actuating lever / sensor faulty. replace sensor (P2005) " diagnostics saying no issue was ever there ? and it does appear to have a bit more top end grunt that I thought had gone walk about
 

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