How EAS Works - write up

[PaulP38a]

In the process of writing up a page about how the EAS works with diagrams and descriptions of the components in the system, and a bit of a FAQ.
Input an FAQ questions welcome.
How EAS Works | PaulP38A.com (http://paulp38a.com/range-rover-p38/how-eas-works/)

Cheers, Paul.

[Keithy P38]

Perhaps a link to the lift write-up in the FAQ section at the end would be the go ;-)

[Pete38]

Nice work Paul. We might have another sticky right next to Keiths recent one :D

My little input:

Perhaps some diagnostics section might be good eg;

If the car is on the bump stops in the morning step one is to unplug the EAS delay timer to see if its a leak or possible sensor problem etc.

[wayneg]

Paul, can you add the best location to t into the air supply for a pressure gauge, tyre inflation and or locker use.

[p38arover]

I recall looking at the diagram in the P38A manual and deciding it was incorrect but I can't remember what was wrong with it.

[Scouse]

I recall looking at the diagram in the P38A manual and deciding it was incorrect but I can't remember what was wrong with it.After carrying out an engine bay & fascia harness rewire this week, I'm surprised at the errors in the manuals.


:angry:

[PaulP38a]

The diagram in the manual for connector C139 is wrong.
Position 14 according to the diagram should go to pin 1, 15 to pin 2 etc.
I have made aa note of this but need to test each pin to ensure it is correct at some stage.

[PaulP38a]

Perhaps a link to the lift write-up in the FAQ section at the end would be the go ;-)
Give me the right FAQ question and I will do it :)


My little input:

Perhaps some diagnostics section might be good eg;

If the car is on the bump stops in the morning step one is to unplug the EAS delay timer to see if its a leak or possible sensor problem etc.

Done, now included in the FAQ. Also added a Diagnostic section where I will review available diagnostic tools.


Paul, can you add the best location to t into the air supply for a pressure gauge, tyre inflation and or locker use.
Done, now included in the FAQ.

[Keithy P38]

I don't have FAQ's for you Paul! Perhaps when my valve block decides it's had enough I might though!

[Pete38]

I don't have FAQ's for you Paul! Perhaps when my valve block decides it's had enough I might though!

Perhaps there could be a section that says that changing of height sensor arm lengths when applying a lift kit (insert your write up plug link here keith) could require changing the EAS settings. :o :wasntme: :D

[Pete38]

Hopefully your informative page Paul will help keep a few more non castrated P38 on the road.

If I had more problems/experience with my EAS I'd draw up a rough flow chart (boxes with arrows to make it logical diagnostics) for you to add. Well I can give it a go anyway if you'd like but your knowledge of this is far greater than mine.

[superquag]

Any information on height sensor repair or substitution? Or cross-over between differant model?
The Classic was the original EAS, and the pots are either non-existant or $$. Mine suffered dry solder joints, which was an easy fix.
Compressor is the same one, but needs a few exterior alterations to fit either.

A system pressure gauge would be a good idea for leak detection and pump health.

Anyone measured wave-forms on the various inputs to the ECU? - Came across a Classic with a retro-fitted td5. Naturally, the pump would'nt operate 'cos the ECU did'nt have proof the engine was running at all or fast enough. Needs a pulse-train from the (v8) alternator... Such fun, seeing mechanic and owner tearing hair out !:twisted:

[gavinwibrow]

QUOTE
Anyone measured wave-forms on the various inputs to the ECU? - Came across a Classic with a retro-fitted td5. Naturally, the pump would'nt operate 'cos the ECU did'nt have proof the engine was running at all or fast enough. Needs a pulse-train from the (v8) alternator... Such fun, seeing mechanic and owner tearing hair out !:twisted:



Just as well you suggested a particular course of action, or we might never had got back to the root problem. Might even get wee beastie back next week and then post some pics. Looking at this thread with some clinical interest - ummm!

[benji]

You can get height sensors for the classics through Island 4x4.

They're a different shaped potentiometer, with a link lead to the classic harness and come with a mounting kit. I was comparing these just the other day to see if I could use them for modifying for the eas lift, but no luck.

[korbz]

Paul, that is a great summary and serious community service! :) Good job!