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Discussion Starter #1
I recently had an issue where I was driving on the freeway and got a EAS hard fault when the suspension was trying to lower down to highway mode. I built a cable following the directions on RSW Solutions site and was able to read the codes. A big shout of to Storey for all his time working on documentation on the website and his software, which I am sure has saved us all countless dollars. The fault I got was Exhaust Valve Stuck, which I read is most likely the exhaust silencer being clogged and fairly simple. I also got two Signal Incorrect codes, so I unlocked the computer and thought I would be ready to go. However the Exhaust Value Stuck is gone but there is a 2 - FR Signal Incorrect that is giving me a hard fault and the second Signal Incorrect fault is no longer showing. From what I have read this is typically a soft fault unless there are two Signal Incorrect faults but I am reading only one. I was going to try and pull the sensor and move it to the front left to see if the fault follows the sensor but I wanted to see if anyone had any ideas on trying to troubleshoot this error any more or a documented process on troubleshooting Signal Incorrect errors.

Thanks,
David
 

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1995-2002 Range Rover P38A
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A faulty wheel sensor normally gets the vehicle to tilt to one side, blocked exhaust silencer is a major factor on the EAS system as to is all the o rings within the block
 

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Discussion Starter #3
So swapped the front sensors to see if I could track the problem to the right front sensor, however the Signal Incorrect fault still kept coming from the right front. So this leads me to believe that one of the following is the culprit:

1) Height Sensor Connector
2) Wiring from Height Sensor to the EAS computer
3) EAS computer connector
4) EAS computer

I was going to spend some time with the continuity tester to check between the Height Sensor Connector and the connector at the EAS computer. I was also thinking it would be a good idea just to pull the connector at the EAS computer to make sure the connection is clean and good. Does anyone have any ideas or tips when it comes to troubleshoot this particular situation?
 

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David,

Before you will get into the electric-fault-circuit of the Range :), please do check the Compressor. I know it might be a weird place to start the search, but too many times it happens that an EAS Valve Block fault is being produced and the reason of the fault is the compressor.

Just take out the compressor, open the 4 screws of the square piece of metal and look inside the alloy ring... It takes about 5 minutes to do this and perhaps it saves you a lot of time ..

Regards,
Goswin
 

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Discussion Starter #5
Goswin,

As per your advise I opened up the compressor and it was quite and easy/quick job. I wasn't quite sure what I was looking for but I assume I was inspecting the piston for potential damage. Everything looked normal so I buttoned it back up however I did try and move the piston a little bit by hand and it didn't budge at all.

So tomorrow I am going to use multimeter on the continuity setting and just try to track the wiring from the sensor to the ecu. Perhaps first I will try and pull the connector at the computer and re-seat it just to make sure it isn't something simple.

Thanks,
David
 

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Disconnecting the Pump before you'll start with 12V and/or multi meter is a good thing.

The multi meter must give a full readout on all combinations! If not, your thermal switch must be replaced.
When you throw in 12V directly on the pump, DO NOT USE THE ORANGE WIRE. The Orange wire is connected to the thermal switch. Put 12V on the Green/Black wires and you can check if the pump start running.

That is the electrics of the EAS Pump in a nutshell.

Regards,
Goswin
 

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Discussion Starter #7
So I have no idea what I did to actually fix the problem but it isn't giving the fault anymore as of last night. However I pulled the connector at the EAS computer and tested the continuity between the height sensor and the computer and everything turned out fine. I plugged both connectors back in and pulled up the EASUnlock and was looking specifically at the Heights tab to see if I could track down what was going on the the Front Right side. That sensor was returning a lower value than the other sensors so I proceeded to start the pump and then clicked the Up button on the Heights tab. In the end I am not quite sure what happened to make the error go away but I took it out for a drive yesterday and everything was fine. I will post back if this problem comes around again but I am definitely going to keep my eye on it and probably install a MARS system as insurance.

David
 

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Thank you for the positive feedback. Some days, everyone in my emails bashes me with critisim about my software and products while other days like this I get positive comments.

I stumbled across a great website a few weeks ago. Please see http://www.falconworks.net/EAS/
There is a section in there about how the C117 connector was manufactured out of specification ofr a few model years. The result was a connector that would occasionally loose contact with the EAS computer. The solution was to trim the rubber gasket so that the connector pressed home more fully. This garage states that "Height Sensors Never Fail"

Storey
 

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My little tip on compressor rebuild is to replace the o ring under the reed valve on the head, you'll be surprised at what a difference it makes on building up air.

Try get viton seal as the handle heat a lot better than standard o rings, silicone it back in and you're away but allow silicone
to set over night, trust it works well

So far EAS problems here are the o rings within the valve block and the compressor piston/sleeve being worn.
Done together I've had very satisfactory resultss
 
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