Suspension stuck high..

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Steve Ashworth

Active Member
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419
Carried some bags of aggregate in my P38 today, probable a few too many.

Was no strain at all for the engine but my suspension is now stuck on high setting.

All the lights on the height setting indicator are lit up and a EAS error message on the dash.

Any idea what this means or if it can easily be reset...

Cheers,
Steve
 
Thanks for the comment,

Does that mean it is posible to do a reset as the first option or do I need to know and re-input actual height settings?

Cheers,
Steve
 
Steve Ashworth said:
Thanks for the comment,

Does that mean it is posible to do a reset as the first option or do I need to know and re-input actual height settings?

Cheers,
Steve
Click to expand...

You don't have to input anything. Just do a reset. When you loaded car air was added to maintain height setting. When you unloaded it air springs expanded under pressure. ECU should have corrected it from high sensor readings. It may just be a glitch because sensors have gone to where they have not been before and ECU has said bollocks to that and shut down. Reset and see what you get. Moral is, don't overload arse end.
 
Thanks Wammers,

I will try that this evening.

I know now not to overload - its the first vehicle I've had with air suspension. My old Series will sink to the floor if I keep adding weight so I have a visual gauge as to when to stop.

The P38 looked fine and drove effortlessly - I guess things are not always as they appear...

Steve
 
Usually... when a car goes UP with an EAS Fault, it means that there is a minor error (soft fault in the software).... In a most cases, the Range will return to normal height after a re-start.

When a Range goes DOWN, is usually is a hard error and safety wise, the car will go to its bumpstops. Such a hard error must be reset (and fixed) first before you can continue.

Orcourse there can always be exceptions ... :)


Regards,
Goswin - the Netherlands
 
Steve Ashworth said:
Thanks for the comment,

Does that mean it is posible to do a reset as the first option or do I need to know and re-input actual height settings?

Cheers,
Steve
Click to expand...


The problem is with the tailgate open the suspension is frozen, so as you unload the rear will rise and take the height sensors past where they would normally go. When you shut the tailgate the EAS ECU gets out of range height sensor readings and locks in high.
EAS unlock will sort the problem:)
 
Datatek said:
The problem is with the tailgate open the suspension is frozen, so as you unload the rear will rise and take the height sensors past where they would normally go. When you shut the tailgate the EAS ECU gets out of range height sensor readings and locks in high.
EAS unlock will sort the problem:)
Click to expand...

Exactly. Did i not say that? :D:D:D
 
It's definitely stuck on high - even after several restarts.

Looks like its been on steroids!

The comments make sense so I will log on with Faultmate and try the EAS Unlock...

Cheers.

PS Anyone know what is the maximum load by weight for a P38 (can't find my manual)
 
Last edited:
Steve Ashworth said:
It's definitely stuck on high - even after several restarts.

Looks like its been on steroids!

The comments make sense so I will log on with Faultmate and try the EAS Unlock...

Cheers
Click to expand...

Reset it Steve it should be fine. It's just the ECU that's had enough and thrown it's rattle of of it's pram.
 
wammers said:
Exactly. Did i not say that? :D:D:D
Click to expand...

In part yes:D It's a bit of a design fault in my opinion, the suspension should not freeze with the tailgate open so that it would continue to level as the car is unloaded.
At the extreme end of travel, the height sensors produce an open circuit, I suspect that this is why the ECU threw a wobbly:D:D:D
 
Datatek said:
In part yes:D It's a bit of a design fault in my opinion, the suspension should not freeze with the tailgate open so that it would continue to level as the car is unloaded.
At the extreme end of travel, the height sensors produce an open circuit, I suspect that this is why the ECU threw a wobbly:D:D:D
Click to expand...


Yes i tend to agree. The no drop with doors open is understandable. So it does not drop onto an obstruction. But as the tailgate in the circumstance would just be lifted i cannot see why it inhibits leveling. However if the sensor goes out of range how is the chassis grounded extra extended mode supposed to work. Bit of enigma that one.:):):)
 
wammers said:
Yes i tend to agree. The no drop with doors open is understandable. So it does not drop onto an obstruction. But as the tailgate in the circumstance would just be lifted i cannot see why it inhibits leveling. However if the sensor goes out of range how is the chassis grounded extra extended mode supposed to work. Bit of enigma that one.:):):)
Click to expand...

Don't know, it was just a thought:)
 
there are two cheats to this one lock the suspension like you would when towing or press the manual lock button on the classic to lock it too
 
Using the lock suspension button made no difference.

Logged on with Faultmate and tried various options as there is no "reset" option as such.

There was a fault logged about a pressure switch error. I thought the fault log was exactly that - just a logged event. However when i cleared the logged fault code, turned off the ignition and restarted the engine it reset itself to normal.

It now seems OK.

The load i had on board was 625kg (25# of 25kg bags). According to data it can carry up to 680kg. I guess that to be stuk on high with that load on board must at least mean that the bags are good and leak free?

Cheers guys,

Steve
 
Gentlemen, i like that case study!! When i overload;), i cheat the uppertailgate lock in order to keep control on the suspension even with the upper tailgate open. I believe that in that case there wouldn't be any fault and the car would lower fine. In that particular case i would touch the 4 air hoses in order to depresdurize the springs. I don 't think a reset will be of any help because it looks like a sensor is out of range and the fault will happen again as soon it has been resetted. So deflate manually first then reset.
 
Interesting comments.

I did deflate the system by accident when trying to reset with faultmate. Thought I was going to be stuck on the bumpstops! It re-inflated when I cleared the fault log.

What are the recomended settings for normal height so that i can double check that it is now OK!

Also what do you do to "cheat" the uper tail gate...

I wasn't actually overloaded - I had 625kg aboard where as the data suggests that max gross weight at rear axel allows for upto 680kg assuming driver only and full fuel tank - I had driver only and < 1/4 tank of fuel.

In the case of overloading what is normally the weak point and lilely to fail...

Cheers,
Steve
 
Steve Ashworth said:
Interesting comments.

I did deflate the system by accident when trying to reset with faultmate. Thought I was going to be stuck on the bumpstops! It re-inflated when I cleared the fault log.

What are the recomended settings for normal height so that i can double check that it is now OK!

Also what do you do to "cheat" the uper tail gate...

I wasn't actually overloaded - I had 625kg aboard where as the data suggests that max gross weight at rear axel allows for upto 680kg assuming driver only and full fuel tank - I had driver only and < 1/4 tank of fuel.

In the case of overloading what is normally the weak point and lilely to fail...

Cheers,
Steve
Click to expand...

Steve as i said and Data it maybe just a case of sensor going into unknown territory and ECU saying sod that. If you do it again half way through unload just shut the tailgate with engine running and let it settle before continuing. Best thing i can think of at moment. By the way the total carrying capacity is with load evenly distributed not all of it in boot.
 
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