scottydouk · Sep 27, 2013

would anyone be able to guide me in the right direction please. I have a 1996 4.6 range rover with a air suspension fault.
was working as should, raises, lowers on the height switch, drove it home after 10miles car was on its bump stops :-(

pump cannot be heard running.
checked fuses - all ok.
tried another relay no difference.
bypass pump relay and compressor works fine.
checked codes in suspension and none logged.

what items can cause the pump not to be activated and where located?

all help appreciated!

Druim · Sep 27, 2013

scottydouk said:
would anyone be able to guide me in the right direction please. I have a 1996 4.6 range rover with a air suspension fault.
was working as should, raises, lowers on the height switch, drove it home after 10miles car was on its bump stops :-(

pump cannot be heard running.
checked fuses - all ok.
tried another relay no difference.
bypass pump relay and compressor works fine.
checked codes in suspension and none logged.

what items can cause the pump not to be activated and where located?

all help appreciated!

Thermo switch in pump

dogsbody · Sep 27, 2013

Druim said:
Thermo switch in pump

Druim is a man of few words but they are enough.

(mind you, you could check it with the info in Wammer's 'how to' at the top of this section)

Datatek · Sep 28, 2013

Druim said:
Thermo switch in pump

Caused by compressor repeatedly overheating feeding leaks.

gfromleeds · Sep 28, 2013

Theres a maxi fuse thats not listed as powering eas but ive have probs years ago

Saint.V8 · Sep 28, 2013

What are you using to check faults?

Druim · Sep 28, 2013

Datatek said:
Caused by compressor repeatedly overheating feeding leaks.

not necessarily a leak, could be pump seal/liner needs overhaul/changed or switch just gave up

Datatek · Sep 29, 2013

Druim said:
not necessarily a leak, could be pump seal/liner needs overhaul/changed or switch just gave up

Almost all compressor failures are caused by overwork.

scottydouk · Oct 5, 2013

Saint.V8 said:
What are you using to check faults?

Snapon scanner

gfromleeds · Oct 5, 2013

Not sure if snapon can read p38
If I remember right someone once said the ob2 connector in the p38 eas if wired up diferantly
send datatec a pm for his data cable and you'll be able to do it with a regular laptop

or stick your location in your profile and maybe someone local to you will have a go

Grrrrrr · Oct 5, 2013

Check thermal switch testing in Wammers' How To guide. It isn't always 100% accurate (that particular test, not the guide!) but it is a damn good starting point.

scottydouk · Oct 7, 2013

Grrrrrr said:
Check thermal switch testing in Wammers' How To guide. It isn't always 100% accurate (that particular test, not the guide!) but it is a damn good starting point.

have checked the thermal switch, has good continuity and if do ground the orange wire compressor still doesn't run :-(

can the pressure switch cause the pump not to run?

Saint.V8 · Oct 7, 2013

scottydouk said:
have checked the thermal switch, has good continuity and if do ground the orange wire compressor still doesn't run :-(

can the pressure switch cause the pump not to run?

Did you ground the Orange Wire whilst still plugged in??

Easiest way is to peel a bit of the insulation off and using a jump wire to ground...

scottydouk · Oct 7, 2013

Saint.V8 said:
Did you ground the Orange Wire whilst still plugged in??

Easiest way is to peel a bit of the insulation off and using a jump wire to ground...

Yes main plug was still connected

Saint.V8 · Oct 7, 2013

scottydouk said:
Yes main plug was still connected

Oh...

The Pressure Switch tells the ECU the Tank is either Full or Low - the ECU then pulls in the Relay...in that instance, then I guess a duff pressure switch could prevent the pump running!

Do you have the EASUnlock Software and Lead? As you can test the pump using this!

Doa · Nov 2, 2018

Hello I've the same problem, my eas just went on limp mode as I was driving, I've tested my pump, took the blue pipe of, hard wired the relay and ran the pump I could keep my finger over the hole hardly no pressure at all so sent for a repair kit,, hopefully it will pump up a d I can have a look for leeks

Datatek · Nov 2, 2018

Doa said:
Hello I've the same problem, my eas just went on limp mode as I was driving, I've tested my pump, took the blue pipe of, hard wired the relay and ran the pump I could keep my finger over the hole hardly no pressure at all so sent for a repair kit,, hopefully it will pump up a d I can have a look for leeks

Leeks are tasty in a stew

If the pump has failed, odds on you have leaking air springs, they have a design life of 7/8 years 80K miles

Mukiwa · Nov 8, 2018

Scotty,
My comp packed up a couple of months ago. When I finally got a chance to check it out I did all you did. Then found that the power plug from the comp to wiring loom had melted internally - nasty job. When I took the comp off and connected it to a 12v supply it came to life. No damage at all to the pump. Check that plug mate if you haven't already.
cheers,
Hoppy

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