C

Canned

New Member
Hey all,
New to the forum and I'm posting this on behalf of my technophobe brother....
Forgive me if this has already been covered - I searched but found nothing definitive on it.

His 99 P38 is riding on the bump stops with the "35mph max" error on the dash. Through searching here I managed to get the software to communicate with the suspension control unit. I followed the instructions to try to clear the error and it wouldn't.
Here are the faults showing up:
3 : F8:8_Hidden
4 : RL signal incorrect
5 : F8:32_Hidden
6 : RR signal incorrect
7 : F8:128_Hidden
0 : Engine speed fault
3 : Pressure signal constantly low
4 : Air supply fault
5 : Air supply leak
6 : Target heights incorrect
7 : Vehicle has moved
1 : Cannot lower FR
3 : Cannot lower RR
4 : FA:16_Hidden
5 : FA:32_Hidden
6 : FA:64_Hidden
7 : FA:128_Hidden
0 : FL valve stuck open
1 : FR valve stuck open
3 : RR valve stuck open
4 : Inlet valve stuck open
5 : Exhaust valve stuck open
6 : FB:64_Hidden
7 : FB:128_Hidden
2 : RL valve stuck closed

Does anyone have any idea of a diagnosis? I was thinking maybe it's the control unit done in or compressor unit seals.

At the moment he's considering going for a coil conversion - anyone got ideas on where is the best place to buy (or should he pursue the air suspension problem to a fix?)

Thanks a million for any help!

Tony
 
Canned said:
Hey all,
New to the forum and I'm posting this on behalf of my technophobe brother....
Forgive me if this has already been covered - I searched but found nothing definitive on it.

His 99 P38 is riding on the bump stops with the "35mph max" error on the dash. Through searching here I managed to get the software to communicate with the suspension control unit. I followed the instructions to try to clear the error and it wouldn't.
Here are the faults showing up:
3 : F8:8_Hidden
4 : RL signal incorrect
5 : F8:32_Hidden
6 : RR signal incorrect
7 : F8:128_Hidden
0 : Engine speed fault
3 : Pressure signal constantly low
4 : Air supply fault
5 : Air supply leak
6 : Target heights incorrect
7 : Vehicle has moved
1 : Cannot lower FR
3 : Cannot lower RR
4 : FA:16_Hidden
5 : FA:32_Hidden
6 : FA:64_Hidden
7 : FA:128_Hidden
0 : FL valve stuck open
1 : FR valve stuck open
3 : RR valve stuck open
4 : Inlet valve stuck open
5 : Exhaust valve stuck open
6 : FB:64_Hidden
7 : FB:128_Hidden
2 : RL valve stuck closed

Does anyone have any idea of a diagnosis? I was thinking maybe it's the control unit done in or compressor unit seals.

At the moment he's considering going for a coil conversion - anyone got ideas on where is the best place to buy (or should he pursue the air suspension problem to a fix?)

Thanks a million for any help!

Tony
Click to expand...

You not doing something correctly, have you tried switching off ignition, unplugging diagnostic's cable, rebooting ya PC and starting over as mentioned in the tips section of the software. stating the obvious I know, but unless you clear all the faults, nothing gonna work.
 
Yeah - I went into the help section and repeated the steps several times but to no avail..... Should they definitely clear?
 
Canned said:
Yeah - I went into the help section and repeated the steps several times but to no avail..... Should they definitely clear?
Click to expand...

Yea, they should all clear by doing the following, which by the way, is copy & pasted straight from instrustions.
  • [FONT=Calibri,Trebuchet MS]
  • Once you have read and understood the listed faults you can attempt to clear them from memory by clicking the [/FONT][FONT=Calibri,Trebuchet MS][FONT=Calibri,Trebuchet MS]UnlockEAS[/FONT][/FONT][FONT=Calibri,Trebuchet MS] button.
  • Now press the red [/FONT][FONT=Calibri,Trebuchet MS][FONT=Calibri,Trebuchet MS]Stop[/FONT][/FONT][FONT=Calibri,Trebuchet MS] button, close the program, turn the ignition off and unplug the cable from the vehicle. The faults should now be cleared.
Please remember, the vehicles ECU does a test as soon as the ignition is turned on, if you have not repaired the faults listed, the fault codes may just re-appear as soon as you turn the ignition back on.
[/FONT]

maybe send an email to RSW Solutions if you can't get it working.

Could be there is a hardware issue also, I found mine was inconsistent on me new laptop with the adapter for the USB to Serial port converter. When I loaded software onto old PC that had serial port it works fine every time.
 
Just tried this 10 times and still no good.... Surely the fact that they won't clear says something about the suspension system's condition?
 
Canned said:
Just tried this 10 times and still no good.... Surely the fact that they won't clear says something about the suspension system's condition?
Click to expand...

Make sure the connection in the OBD plug n socket are clean with good electrical conductivity.

And one thing are all the doors closed while your trying to read/reset the EAS ECM, I now open the front windows and have the engine running while running the EAS Software.

I take it your using the correct special EAS lead for the software (if you're made the lead yourself, check its wired correctly).
 
Last edited:
Canned said:
Just tried this 10 times and still no good.... Surely the fact that they won't clear says something about the suspension system's condition?
Click to expand...

Do you know anyone with similar vehicle with known good ECU to see if it works in yours.

Seems strange that the software is reading faults and you can't clear them, seems as though the unlock function is not sending info to cpu then, or something similar.
 
Canned, if you say in your location in your profile someone may live close and offer to help.

Also I'd check all the fuses under the bonnet and under the seats
 
Last edited:
I'm in Donegal, Ireland so not sure anyone's around here!

I just thought of something.... The cable I have been using is an OBDII cable.
Is this any different to the EAS one?
 
Canned said:
I'm in Donegal, Ireland so not sure anyone's around here!

I just thought of something.... The cable I have been using is an OBDII cable.
Is this any different to the EAS one?
Click to expand...

Tony

If you are any good with a soldering iron then go to www.rswsolutions.com where you will find detailed instructions on how to wire a serial to OBD plug. You can of course check yours out with a meter to see if it complies with what is required.
As already said if you are using a serial to USB cable then maybe that isn't compatible. could be that causing you problems.
If you have a serial port on your laptop then you should be OK.

Hope this helps
Ian
 
Yeah the cable works in my own car (156) but it's usb so I think it's not compatible.

I just ordered one from ebay which is serial with serial to usb conversion thingy.... fingers crossed!
 
Ok - got this today and just spent some time at the car. Here's what happened....
Unlocked EAS but still got no reaction from suspension so I had a look around the software and decided I'd chance turning on the pump.
It turned on but no raise in suspension. After this I tried using the software to ask it to move to low profile - no reaction and this command switched off the pump.
Turned back on the pump and noted no real suction at the pump's intake so depressurised everything and disconnected the output from the pump.
Tried turning back on the pump (and stayed well clear just in case) and noted no real pressure coming from the pump.
Not sure what to expect here though - for all i know it takes an hour to repressurise everything??? Guessing it's not normal though.
Just opened where the piston from the pump goes down into the compression cylinder and the cam etc is in good shape but I think the seal on the piston itself is a little loose in the cylinder... Is the seal on the piston replaceable at all?
From looking at the whole system I'm guessing the compressor feeds a pressure resevior and not directly pumping the suspension itself?
 
Loads of threads on this, you pump is knackered, fit a replacement seal, unless the mechanics are broken. You can get the seal kit off Ebay, a Dutch company offers uprated parts which I think some have tried with success.
 
Sounds like you might be on the right track with the pump - I would expect noticeable pressure from the outlet while it's running, but that doesn't explain the enormous list of reported faults - have you managed to clear them yet?

As for the suspension not moving, have you got the engine running while you run the pump? It can take 10 minutes to fill the air tank up, but I would expect it to start moving much quicker than that. Thgis is actually quite a good test of just how good the pump is - the suspension should rise fairly quickly, depending whether it's been completely depressurised or not).

I assume that you had all the doors and tailgates closed? (eas is locked if any are open).

If you've managed to clear the faults, I would disconnect the laptop, start the engine, make sure all the doors and tailgate are closed and just let it idle for 10 minutes or so. If it still doesn't rise after that then there is a problem.

Mine refused to respond to the height commands on the software once - it was a bit disconcerting, but it sorted itself out once I unplugged it and plugged it back in again after making it lift itself.

Guy
 
Well, it's been a while - I've been up and down to my brothers and he's a technophobe so won't risk going at it alone!

Here's where we are now....
Got the pump seals all fitted and put everything back together... Unlocked EAS.

Tried leaving the car idle to see if suspension would go. Nothing.
Tried using the "Pump on" button in the EAS software. System was completely depressurised so took a little while and then raised (back first then front - normal?)
Once fully up tried using the software to move to standard height - this worked.
Tried moving it to full height - nothing.
Tried Access height - moved to access.
Moved to Standard again - successfull.

Noted that the left side appeared (and then physically measured) higher than the right.
Used the "get height" button which confirmed this. After returning the heights there was a shift in the suspension but imbalance remained.

Overall it looks like the thing needs some kind of calibration (or has a sensor issue?) but one thing I'm concerned about is that at no point did the pump switch on by itself. It will only turn on when given the command through the laptop.


Any ideas?

Also wondering if anyone is aware of any software for airbag/abs/other systems that's available?
 
Could be the pressure switch I suppose, but not sure. I suppose you do have all the doors closed when testing? The EAS is locked when doors or tailgate are open.

You can re-calibrate the heights with the EAS suite, You say it won't go up to max height, have you checked the sensor readings are different when you call for max height? It's possible the height sttings have been corrupted and are the same as normal height.
 
Canned said:
Well, it's been a while - I've been up and down to my brothers and he's a technophobe so won't risk going at it alone!

Here's where we are now....
Got the pump seals all fitted and put everything back together... Unlocked EAS.

Tried leaving the car idle to see if suspension would go. Nothing.
Tried using the "Pump on" button in the EAS software. System was completely depressurised so took a little while and then raised (back first then front - normal?)
Once fully up tried using the software to move to standard height - this worked.
Tried moving it to full height - nothing.
Tried Access height - moved to access.
Moved to Standard again - successfull.

Noted that the left side appeared (and then physically measured) higher than the right.
Used the "get height" button which confirmed this. After returning the heights there was a shift in the suspension but imbalance remained.

Overall it looks like the thing needs some kind of calibration (or has a sensor issue?) but one thing I'm concerned about is that at no point did the pump switch on by itself. It will only turn on when given the command through the laptop.


Any ideas?

Also wondering if anyone is aware of any software for airbag/abs/other systems that's available?
Click to expand...

yep, burnt out thermal overload switch in compressor.
 
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