95 Range Rover EAS problem

I have a 95 Range Rover 4.0SE. The EAS was working fine until Monday.
The extend-high indicator light is on all the time. The high position
indicator lights all on. Body is on the highest position with
right-hand side 2" higher than the driver side. The high adjust
function is not working now. What is the possible cause? My son took
the car to off-road driving a week ago and came back with mud all over
the bottom side. Will this caused the EAS malfunction? Is the coil
spring conversion the option to resolve this problem once for all?

"David Dunn" <[email protected]> wrote in message
news:[email protected]...
>I have a 95 Range Rover 4.0SE. The EAS was working fine until Monday.
> The extend-high indicator light is on all the time. The high position
> indicator lights all on. Body is on the highest position with
> right-hand side 2" higher than the driver side. The high adjust
> function is not working now. What is the possible cause? My son took
> the car to off-road driving a week ago and came back with mud all over
> the bottom side. Will this caused the EAS malfunction? Is the coil
> spring conversion the option to resolve this problem once for all?
>

Coils will sort it, but you would miss the air system too much i fear.
Sounds like a sensor malfunction to me. Might be worth getting the fault
codes & starting from there.

Nige

David Dunn wrote:
> I have a 95 Range Rover 4.0SE. The EAS was working fine until Monday.
> The extend-high indicator light is on all the time. The high position
> indicator lights all on. Body is on the highest position with
> right-hand side 2" higher than the driver side. The high adjust
> function is not working now. What is the possible cause? My son took
> the car to off-road driving a week ago and came back with mud all over
> the bottom side. Will this caused the EAS malfunction? Is the coil
> spring conversion the option to resolve this problem once for all?

Possibly height sensors, although normally if they are faulty
the EAS ECU has a fit and give you an EAS Fault message.
Could be sticking valves in the block which are stopping it from
coming down, but I'm not sure why operating the button on the dash
wouldn't at least make an attempt at doing something!

Best bet is probably to get it along to a specialist who can hook it up
to the diagnostics computer to see what is causing the problem as they
can read the output of height sensors etc.

I wouldn't jump into replacing with springs - the EAS is great and most
of it can be fixed pretty cheaply now.

Matt

The message <[email protected]>
from "David Dunn" <[email protected]> contains these words:

> I have a 95 Range Rover 4.0SE. The EAS was working fine until Monday.
> The extend-high indicator light is on all the time. The high position
> indicator lights all on. Body is on the highest position with
> right-hand side 2" higher than the driver side. The high adjust
> function is not working now. What is the possible cause? My son took
> the car to off-road driving a week ago and came back with mud all over
> the bottom side. Will this caused the EAS malfunction? Is the coil
> spring conversion the option to resolve this problem once for all?

probably a relay, no idea where these are on a p38 but if light on the
switches is on all the time then you get positive feedback when main
relay dead. the ecu thinks you are sending it a message when you are
not. I seem to remember there are 3 or 4 which used to be under drivers
seat in RHD classics but I think they got moved to behind dash panel or
side foot panel.

I changed the relay in the fuse compartment next to the battery under
the hood abut with the same result. I removed the suspension high
control unit (under driver seat) and found mud trapped inside the unit.
I found there are few connector pins shorted together because of the
copper migration/rust (mud and water trapped insie the connector).
After cleaned up I did the resistant measurement and found there are
funny reading on some pins. The resistant keep changing and looks like
I am charging a capacity. By checking the pin assignment from the RR
electrical diagram I found the left hand side high sensor input (front
and real) had 43k ohm reading but the right hand side high sensor input
pin resistant is keep changing and the other right hand side high
sensor input had 2.7k ohm reading. Is that mean my suspension high
control unit malfunction? As I mentioned earlier, my RR right hand
side does higher than left hand side by 1.5" to 2". Will
air-suspension delay timer will cause my EAS problem too?

....and David Dunn spake unto the tribes of Usenet, saying...


> I changed the relay in the fuse compartment next to the battery under
> the hood abut with the same result. I removed the suspension high
> control unit (under driver seat) and found mud trapped inside the
> unit. I found there are few connector pins shorted together because
> of the copper migration/rust (mud and water trapped insie the
> connector). After cleaned up I did the resistant measurement and
> found there are funny reading on some pins. The resistant keep
> changing and looks like I am charging a capacity. By checking the
> pin assignment from the RR electrical diagram I found the left hand
> side high sensor input (front and real) had 43k ohm reading but the
> right hand side high sensor input pin resistant is keep changing and
> the other right hand side high sensor input had 2.7k ohm reading. Is
> that mean my suspension high control unit malfunction? As I
> mentioned earlier, my RR right hand side does higher than left hand
> side by 1.5" to 2". Will air-suspension delay timer will cause my
> EAS problem too?

Mud in electronics, corrosion, inconsistent readings, fault persists - I
think you've found your answer.

--
Rich
==============================

There are 10 kinds of people in the world - those who understand binary
and those who don't.

David Dunn wrote:
> I changed the relay in the fuse compartment next to the battery under
> the hood abut with the same result. I removed the suspension high
> control unit (under driver seat) and found mud trapped inside the unit.
> I found there are few connector pins shorted together because of the
> copper migration/rust (mud and water trapped insie the connector).
> After cleaned up I did the resistant measurement and found there are
> funny reading on some pins. The resistant keep changing and looks like
> I am charging a capacity. By checking the pin assignment from the RR
> electrical diagram I found the left hand side high sensor input (front
> and real) had 43k ohm reading but the right hand side high sensor input
> pin resistant is keep changing and the other right hand side high
> sensor input had 2.7k ohm reading. Is that mean my suspension high
> control unit malfunction? As I mentioned earlier, my RR right hand
> side does higher than left hand side by 1.5" to 2". Will
> air-suspension delay timer will cause my EAS problem too?
>
Hi David,

I have been having fun with my P38 EAS like you. I have changed all four
airsprings last month (leaking) and just this weekend rebuilt my totally
worn out compressor.
Yours sounds like bad connections somewhere, maybe the connectors under
the car to the height sensors need attention. How did mud and water get
into the EAS ECU??
Take a look at
http://www.rangerovers.net/repairdetails/airsuspension/index.html for
lots of useful information. Good luck.

gazza

Well, my son had too much fun on the off-road driving adventure. He
did not know how the mud got into the ECU either.