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Discussion Starter #1
Hi folks,

I was wondering if you could give me some hints on what is going on with my EAS.

When I start the vehicle it is sitting on its bump stops. The ride indicator shows it at the bottom level and the normal ride level is blinking to suggest that it wants to reach that point. When I am travelling when I get to highway speed then the indicator changes accordingly so one assumes that that is all working correctly. Problem is it never gets off the bump stops... EVER.

It isn’t giving me a EAS fault on the dash either. I took it into a RR specialist and they suggest that I but a new computer in it. So I did. Still the same problem. I bought it back to them and they couldn’t get their proper diagnostic tools to work on it. They just wouldn’t communicate with the new computer either. Then they suggested I check the fuse box under the bonnet. I stripped it back to the circuit boards and checked it for solder that has dripped off the relays that had got very hot and it all seemed clean. I did a resistance test on all the circuits that were involved with EAS and they came out ok. Put the fuse box back together it all worked.

I put the software on it that you suggest and its tx/rx gives the code 28/80 most of the time... however occasionally there is a DE in there instead of the 80. I cannot communicate with the computer at all. But here is the thing.

When I unplug the EAS computer with the EASunlock software still connected then reconnect it , the software begins to communicate correctly by this I mean the tx/rx responds by ff and I can lock and unlock the EAS as well as get the messages on the dash , turn the pump on and off and get the calibrations to be read. Sounds good right? Well until I ask it to give me the height sensor reading which it gives me then immediately starts giving me 28/80. No communication again. Can’t turn pump on or off etc.

Could this last bit of information jog anything that I should be looking at?

I look forward to your reply as i am getting quite desperate and no one seems to know what is going on.

Cheers

Dan Walsh
Western Australia
 

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2010-2012 Range Rover MkIII / L322
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Can you telll if the compressor is running and if so, how often does it run? I just wanted to check that there is air being pumped into the EAS system.
 

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One other quick check item is the orange wire to the compressor, it should have continuity to ground or the computer see's it as overheated and shuts it off.
I had to jumper mine to ground after blowing a line on a hot (105 F ) day.
and then a lf rear bag.......................
Overlooking this circuit cost me 1 month of M.A.R.S. usage after the bag replacement :roll:
I made the cable and downloaded the EAS software, cleared the codes and dash message, worked great :dance:
After grounding the orange wire and claering the codes, start the engine with the driver door open, let the compressor run for at least 4-5 min or till it stops, as long as 10 min, then close the door and select hight and go :thumb:
 

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My 01 4.6 hse had a similar problem, it sat in the garage until I purchased an E.A.S. Buddy Box from RSW Solutions and as soon as I plugged it in it cleared the code and the system started to function normally again. When I downloaded the stored codes into my PC it showed I had a stuck exhaust valve so I would suspect your dump valve on the EAS system is stuck in the open position, maybe a connection problem, ie;bad ground or fouled plug? good luck, Tom.
 

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Discussion Starter #5
Thankyou all for your help,

The thing that I feel is a vital clue is the software won’t communicate correctly when you first plug it in… the “28/80” response is what I get back. I can’t get any of the things to work, that is the messages on the dash and the pump operation etc, nothing. But as I said before as soon as I disconnect the EAS computer under the seat with the software still running and reconnect straight away I get full communication the “ff” response.

Everything operates pump so in answer to the first question i can get the pump to work and the messages etc. I can get a calibration reading and I have no faults recorded either BUT as soon as I ask it to request it to give sensor heights it immediately goes back to 28/80 and I lose communication with the EAS. This happens every time I disconnect the EAS computer and plug it back in. It only works however when I have started the software giving me the 28/80 reading( hope that makes sense?

Would the loose orange earth wire cause a communication problem between the computer and the rest of the system and what is the deal with when i request the height sensors and the computer stop communicating what does that all mean?

Please note I haven’t been given an EAS lock out yet either which is a bit weird I think.

Once again thank you for your advice wish I had of got it earlier would have rather have given you the money than buy an ECU!
 
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