[stueep38]

Evening all. problems with my EAS since November after buying a new EAS compressor from LR the compressor stopped working! They gave me a new one which packed up after 2 weeks! They wouldn't replace again as said its a problem with the car?? So changed airbags, checked all air lines changed fuse board and done all o rings in valve block. Still didn't work, so took it to a chap who plugged it in and the fault 'tripped' come back as soon as you plugged the car in so he said its 100% the compressor!! Booked in @ LR who said fault ns height sensor so told them to replace it, now today they say "we have done the height sensor And also put on new compressor and it still won't go up" so we will have to investigate futher as we think u have a problem with your wiring!!! It will be 120 ish +vat to try to find fault? Does this ring true to any of you??

 

[kurtjohnson10]

maybe diaphragm split in valve block, that would burn your compressors out pretty quick !

 

[stueep38]

Diaphragm all seems mint, checked it all over with a fine tooth Combe! I chalked everything in 'wammers how too' but really can't sort this problem and don't believe it to be a wiring issue?!

 

[kurtjohnson10]

It could be the NRVS in your valve block leaking along with a lot of other numerous things , though I find it hard to believe a garage can't find the fault if they are a Land rover garage.
Best to get advice of Wammers to Datateck on this too be honest

 

[wammers]

The compressor circuit is pretty simple. Only thing that burns them out is running continuously for some reason. Either feeding a leak or pressure valve or pressure valve circuit failed making it run constantly against pressure. Only thing that stops it in that scenario is thermal cut out. When that cools it starts again in a cycle. That would burn it out PDQ.

 

[stueep38]

I think it's the thermal cut out tbh, but they said they put a new one on it and it won't work?!?! Unless they don't no what there doing? Maybe too old for them if they have 'young'uns' in the workshop!!!

 

[wammers]

I think it's the thermal cut out tbh, but they said they put a new one on it and it won't work?!?! Unless they don't no what there doing? Maybe too old for them if they have 'young'uns' in the workshop!!!

Thermal switch MUST be normally closed type. If they fitted a normally open type it will never work. There needs to be solid continuity from Orange wire to Black wire on plug or the ECU will not pull the relay.

 

[stueep38]

Well when a LR mechanic plugged it in the compressor come back fine, but the second you start the car it comes up 'tripped'??

 

[wammers]

Well when a LR mechanic plugged it in the compressor come back fine, but the second you start the car it comes up 'tripped'??

I am not familiar with the tripped fault, but i would guess it means the thermal switched is open circuit. It MUST be closed circuit or the ECU will not pull relay 20. Power for relay 20 comes from fuse 40 (40 amps) to relay 20 pin 3. If thermal switch is closed circuit to ground and pressure switch is open circuit. ECU applies power to pin 1 of relay 20, this circuit is made to ground via pin 2. This pulls the relay and power goes from pin 3 to pin 5 to compressor motor via splice S124. Splice S124 takes power to diaphragm solenoid valve activating that and directing air pressure to below diaphragm to pressure seal exhaust port. When pressure reaches 140 PSI +- 7 PSI pressure switch goes closed circuit and signals ECU to remove power from pin 1 relay 20, this cuts power from pin 3 to pin 5 and compressor stops, solenoid valve drops and air from gallery is exhausted to atmosphere, air from below diaphragm is exhaust via 4 mm pipe into loom. See my "How to" for how to check thermal switch for function.

 

[Datatek]

I can't really add much to Wammers post except check the connectors behind the nearside kick panel. Other than that I doubt it's the wiring.

 

[wammers]

I can't really add much to Wammers post except check the connectors behind the nearside kick panel. Other than that I doubt it's the wiring.

After initial plug in the EAS box all cables for Compressor circuit are direct wired to ECU. They are not interfaced at white plugs.The compressor circuit is virtually an autonomous entity.

 

[Datatek]

After initial plug in the EAS box all cables for Compressor circuit are direct wired to ECU. They are not interfaced at white plugs.The compressor circuit is virtually an autonomous entity.

I know that but the compressor will not run with a fault condition.

 

[wammers]

I know that but the compressor will not run with a fault condition.

True, but it certainly won't run with a duff thermal cut out. Which i think is the problem. Maybe the Land rover fitter has not read my "How to".

 

[matt1987]

Evening all. problems with my EAS since November after buying a new EAS compressor from LR the compressor stopped working! They gave me a new one which packed up after 2 weeks! They wouldn't replace again as said its a problem with the car?? So changed airbags, checked all air lines changed fuse board and done all o rings in valve block. Still didn't work, so took it to a chap who plugged it in and the fault 'tripped' come back as soon as you plugged the car in so he said its 100% the compressor!! Booked in @ LR who said fault ns height sensor so told them to replace it, now today they say "we have done the height sensor And also put on new compressor and it still won't go up" so we will have to investigate futher as we think u have a problem with your wiring!!! It will be 120 ish +vat to try to find fault? Does this ring true to any of you??

If the dealer has checked your vehicle, replaced parts which havent fixed your problem, which they said would fix your problem,then why should you have to pay for wiring checks as they have mis diagnosis the vehicle. Well thats how our main dealer works. If we mis diagonsis on vehicle then why should you pay for further diagnosis.