J

JerryXt

New Member
The EAS warning has manifested itself a couple of times recently.

Both times, the lights went on immediately when the car hit a bump. Is it possible that there's another short in the loom that's causing this? Are there any 'usual' places where the loom might become damaged over time? Anything else that could cause an issue when the car hits a bump??

The original break in my loom is taped over and it seems unlikely that it's shorting again.


Thanks for your help!
 
Could just as easily be a dodgy height sensor, had a similar thing on mine when I first had it, it was a front height sensor.
 
excellent, thanks. From memory, sensors aren't too expensive? Do they need to be calibrated? I'd guess they would.
 
...could it be that the tyre pressure could be too high, causing the system to freak? I have been experimenting with pressure in an attempt to get the car to stop squirming. Didn't put two and two together until this morning...
 
JerryXt said:
...could it be that the tyre pressure could be too high, causing the system to freak? I have been experimenting with pressure in an attempt to get the car to stop squirming. Didn't put two and two together until this morning...
Click to expand...
no chance......

The height sensors take measurements from the height difference between Radius arm and chassis rail.....not the physical height from the ground.
 
apologies, re-reading my post, the meaning is not clear.

I'm not asking if the height sensors could be affected by the increased tyre pressure, more that the system could be shocked outside operating parameters causing a fault. If the pressure is greater, the system will receive more of a jolt, which would maybe light up the dash.

Thinking about it, I've had no EAS problems until I put a little more air in the tyres.
 
It probably is the tyre pressure - if its too high the car will ride harshly and any height sensor that is badly worn might just be jolted badly enough to go open circuit.(Look for bad joints in their connector plugs too.)
If you test them and need to replace any,dont worry initially about recalibration,the worst case is that the car will lean,(You can get that done later as a single job)but at least the sensors will give a continual output so it wont go into fault state.
If the car is handling badly take a good look at the front radius arm bushses,many P38's now need these replacing,along with shocks,drag links,track rods and anti roll bar links.
They also dont like cheap or worn tyres.
 
No off-roading for me - 100% chelsea tractor I'm afraid!

The car had advisories on the suspension on the last MoT (previous owner), so this time I had my local guy look at it all. He couldn't find anything wrong and neither could the new MoT place. I'm switching between the S4 and the RR so maybe I'm expecting too much from a two and a bit ton vehicle with a high CoG.


I'll look at replacing the height sensors next. It's an old car and I don't mind spending a bit on it.

Thanks for all your help guys. It's very much appreciated. I like to have a bit of banter sometimes, but this sort of help and advice is priceless.
 
Jerry, running my 18" Wranglers at 28psi front and rear when unloaded reduced tramlining dramatically. I upped the rears to the recomended 38psi on my booze run to see the kids before Christmas and it was still OK until I took the booze out!
 
thanks. I think it was running 40 front and rear. I set them at 36 (cold) all round but the recent warm weather increased that to 40psi hot. Too much.

But the mech is using the time to work on other critical systems - I've got a rattle in the drivers door and the wipers on the headlights aren't aligned - looks a little like Rodger Moore's eyebrows in James Bond :D
 
40 psi is a bit hard ! If you think about it,any component that is failing will have to choose a point to actually give up.if you monitor whats actually going on you could capture the actual moment - I managed it this afternoon whilst scoping a transfer box actuator on an L322 - just by chance.
It always amazes me how bad EAS height sensors can get before they log faults or put the fault message up.I've spent years diagnosing faults on various machines/engines and vehicles,changing one small thing is often enough to push it over the edge.Only when you look at multple units do you realise how random it all can be - a small portion you never get to the bottom of.
A quick search should give you plenty of info on testing the height sensors.
 
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