Just 3 little letters: EAS! Wiring diagram ...PLEASE HELP!!!!

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Gallen

Gallen

Member
Posts
20
Hi everyone,

I am embarking on my first Range Rover project (I say "I" but actually mean it's my car but my friend who has a garage is helping me fix it!).

She is a 1997 2.5 DSE Auto in Oxford Blue with Grey Leather.
Its very straight and runs nicely. However she's on the bump stops.

She's had 4 x replacement air suspension bags and a recon pump within the last year, prior to me taking her on.

We've plugged her in and the diagnostics say something along "RHF Height sensor - incorrect reading". We have since checked all the sensors and they are all coming back as ok.

We think the next step is to check the wiring to and from the EAS ecu, from the sensors. However the colours of the wires change somewhere along the way and so I realy do need a EAS Wiring Diagram desperately.

Any advice would be appreciated no end. I cant wait to get her on (or off) the road, so to speak!

All the best,

Gallen.
 
I'd be surprised if it's a wiring problem. More likely the right front sensor as reported or a leak, or a worn compressor, if it was overhauled with the Dutch kit it's odds on a compressor problem. You don't actually say what the problem is, I'm assuming it does not rise.
If you do a search, I'd bet you will not find one case of a wiring problem causing EAS problems, you ar chasing rainbows. First check you have high pressure air from the compressor, then look for leaks.
I assume you unlocked the EAS after reading the faults?
 
have you disconnecting the three pin plug from the compressor and putting 12 volts onto the pin of black wire and earth pin of green wire to see if pump runs and makes air.
 
Hi guys - and MANY thanks for your responses so far. Appreciate it.

At the moment I would have to say none of all of the above.

The issue is that it's on the bump stops (and will not rise) and 35MPH limit is on the dash. I dont think you can hear the pump either.

Apparently, the issues started when the previous owner took it to a high street chain for tyres - they jacked it up incorrectly and damaged all 4 x bags. These were then replaced at a Land Rover dealership at their cost. The guy told me aftre a few months he had the fault which he re-set the faults using a lead and software from eBay - but since it had come on again, he'd had enough of it. So far, the fault has been as he described so no reason to dis-believe him.

We had a quick plug in and read the codes. He then tested the resistance at the height sensors (which matched what they should be) and all seemed ok - hence we thought it may be a poor connection coming from the RHF height sensor back to the ECU OR if not, the EAS ecu. (???).

I am downloading RAVE at home now.........
Well, to be truthful I've actually got my girlfreind doing it for me as she's on maternity leave looking after our littl'n!.
She's burinng to a DVD and dropping it off to my pal at the workshop later.
He's got the Snap-On Diagnostics along with other software on his laptop.
He is familiar with RR Air Suspension set-ups on Discos as he looks after all the local farm vehicles (Discos included) that have had similar issues and exploding bags over the years (LOL!) but he rang me this morning to ask for a P38 EAS wiring diagram, or he will sign on to the RR portal for a day, but has to pay to do that.

I dont know if he has tested the pump like that, but would that bring up the RHF sensor??

G.
 
Last edited:
With the 35mph message on the dash NOTHING WILL HAPPEN You have to clear the faults and unlock the EAS. Download the free EAS software from www.rswsolutions.com.
Not sure your mates Snapon kit will deal with the EAS. The fault is almost certainly the FR sensor as reported and the EAS has gone into hard fault mode.
You can forget the wiring faults.
 
Last edited:
As Datatek says, download or get hold of the rsw software and lead. Clear the faults and unlock EAS. Likely to be a dodgy sensor or compressor. With the software you can manually activate the compressor to see if it's working. If its is it could be the thermal switch which is stopping it kick in in normal use. There is a temp fix for that.. Start with the software and look at the faults.. Good luck..
 
Gallen said:
Hi guys - and MANY thanks for your responses so far. Appreciate it.

At the moment I would have to say none of all of the above.

The issue is that it's on the bump stops (and will not rise) and 35MPH limit is on the dash. I dont think you can hear the pump either.

Apparently, the issues started when the previous owner took it to a high street chain for tyres - they jacked it up incorrectly and damaged all 4 x bags. These were then replaced at a Land Rover dealership at their cost. The guy told me aftre a few months he had the fault which he re-set the faults using a lead and software from eBay - but since it had come on again, he'd had enough of it. So far, the fault has been as he described so no reason to dis-believe him.

We had a quick plug in and read the codes. He then tested the resistance at the height sensors (which matched what they should be) and all seemed ok - hence we thought it may be a poor connection coming from the RHF height sensor back to the ECU OR if not, the EAS ecu. (???).

I am downloading RAVE at home now.........
Well, to be truthful I've actually got my girlfreind doing it for me as she's on maternity leave looking after our littl'n!.
She's burinng to a DVD and dropping it off to my pal at the workshop later.
He's got the Snap-On Diagnostics along with other software on his laptop.
He is familiar with RR Air Suspension set-ups on Discos as he looks after all the local farm vehicles (Discos included) that have had similar issues and exploding bags over the years (LOL!) but he rang me this morning to ask for a P38 EAS wiring diagram, or he will sign on to the RR portal for a day, but has to pay to do that.

I dont know if he has tested the pump like that, but would that bring up the RHF sensor??

G.
Click to expand...

In reply to the last line above, "NO" you gave us very little to work from, so was just going through process of elimination, to see if pump was OK or worn, with thermal breaker being next on list. Please give full details in future, it helps. And don't make statements that mislead us into thinking you have cleared faults etc, when you haven't. And sounds like ya mate is winging it as well, hope his chargeout rate is cheap.
 
ssmn1234 said:
In reply to the last line above, "NO" you gave us very little to work from, so was just going through process of elimination, to see if pump was OK or worn, with thermal breaker being next on list. Please give full details in future, it helps. And don't make statements that mislead us into thinking you have cleared faults etc, when you haven't. And sounds like ya mate is winging it as well, hope his chargeout rate is cheap.
Click to expand...

- I gave as much info as I could - I dont know anything about the P38 nor its EAS suspension!!!! As far as misleading anyone, I dont think thats the case and certainly not intentionally :confused:

Prior to me buying the car, it has had 4 x new airbags and a recon EAS pump.

Ok, update...Ive been away from my computer until now so would like to thank you for your replies and advice so far. Thanks.

In the meantime (and before seeing the latter responses) we tried a new suspension ECU (ANR4499) but the car still shows the same fault. Luckily enough it only cost me £20 from a guy I know who has a breakers yard, so no real loss there.

I'm finding it increasingly difficult to talk to my mate working on it without feeling like I'm hassling him whenever I ask how he's getting on with the car! (but it's been sitting there since February so I NEED it done now). It's getting plugged in to another system tomorrow but in light of above (RSW Software and Lead) I cant say what will happen. If no joy tomorrow I will take the car back and try the RSW Software myself (I'm not even going to suggest this to him as the last thing I mentioned/suggested wasn't met with a very good response! LOL!), so I certainly feel like I cant talk to him about it.

I downloaded RAVE - Very good.

Downloading the RSW Software now :) THANKS SO MUCH.

G.
 
Last edited:
Great stuff - Thank you VERY much.

I have just purchased a P38 EAS Cable and USB Adapter, which comes with the software regardless of waiting until I hear back tomorrow.

G.
 
Have you fixed it yet?

You could try

Check for the pump vibration too see if the pump is running, if it is when you remove the intake filter you should feel a good hard suck on your finger. If only low suction then the pump may not be able to inflate the bags due to piston ring failure.

Check all air lines and listen for any hissing noises, give the air lines a good push home then a pull to see if they have all been fitted correctly. dont forget to check them under the wheel arches at the bags.

Check with diluted washing up liquid for leaks arround all air line junctions, then wash the liquid off with clean water.

Then go and have a cup of tea and report back with what is now happening.

Dont forget the car will not rise or fall with a door or boot open.

Unlikely to be incorrect wiring.

Start in a logical manner by testing pump first then looking for leaks and then for other problems and try not to jump to conclusions.

Good luck
 
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