Land Rover and Range Rover Forum banner
1 - 20 of 21 Posts

·
Registered
Joined
·
12 Posts
Discussion Starter · #1 ·
I have recently purchased a Land Rover Discovery 3 2009 diesel model. It had a intermittent suspension fault on the dash which I knew when I bought it. I would love some help and advice to determine the source of this problem because I love this car and would love to make use of all the features.
The problem, so I have ruled out air leaks by lifting it up and taking measurements and leaving over night successfully no drop in the hight at all, the compressor does function when the fault isn't present it will work as per normal turning on and off .
The suspension fault comes on 90percent of the time and generally it will work fine first thing in the morning but after a short drive I get the amber then red light saying suspension fault limited to 30mph but I can always go faster than that, I doesn't affect the driving at all just annoying hearing the beep all the time.
Cycling the power doesn't make any difference it comes straight back.
I have tried a used compressor module to see if that's the issue but made no difference, unfortunately I don't own a scan tool or so can't see anything specific for my car suspension.
Any help or advice would be greatly appreciated, im happy to give it a go to fix myself I enjoy working on cars and love to learn more about these cars.
 

·
Registered
Joined
·
368 Posts
If you are going to try and fix it yourself, you're going to need a scan tool. Search around, you'll probably arrive at the conclusion that the IIDTool by GAP Diagnostics is the best one on the market. Not the cheapest but for around $500 it pays for itself. Your fault sounds like one that I was having a few months ago. I believe it was due to "pressure not decreasing" when required. I have a Hitachi compressor on my '06 so the fix was a replacement of the drier. If you have an AMK compressor, I believe the same symptoms are fixed by a replacement of the solenoid valve.

You will of course want to troubleshoot it yourself, though. Don't go off my guesses!
 

·
Registered
Joined
·
12 Posts
Discussion Starter · #3 ·
If you are going to try and fix it yourself, you're going to need a scan tool. Search around, you'll probably arrive at the conclusion that the IIDTool by GAP Diagnostics is the best one on the market. Not the cheapest but for around $500 it pays for itself. Your fault sounds like one that I was having a few months ago. I believe it was due to "pressure not decreasing" when required. I have a Hitachi compressor on my '06 so the fix was a replacement of the drier. If you have an AMK compressor, I believe the same symptoms are fixed by a replacement of the solenoid valve.

You will of course want to troubleshoot it yourself, though. Don't go off my guesses!
Thanks allot for responding to my post.
Did the scan tool tell you the pressure was not releasing or did you just come to the conclusion yourself? It sounds like something I should definitely check. I'm yet to look at my compressor yet but I do k ow it works i hear it in the morning but you could be right. What would be the best way to diagnose that without just changing parts?
 

·
Registered
Joined
·
368 Posts
The IIDTool told me that. Then I did research on message boards like this one (but not this one) to see how folks addressed it. My symptoms were just like yours. There are, to my knowledge, only two types of red EAS faults, particularly at higher speeds. One does NOT drop the suspension (this is the pressure not decreasing one) and is yellow at slow speeds. The other red one is the Cross Articulation Fault which drops the EAS to Access height and pertains to a calibration issue.
 

·
Registered
Joined
·
12 Posts
Discussion Starter · #5 ·
Great thanks allot for the info again.
Did yours also fault stationary on startup? mine does if I have recently been for a drive. Which one is the solenoid valve you are referring to?
Toy Lego Auto part Camera accessory Cylinder

Automotive parking light Automotive lighting Product Automotive design Automotive tire
 

·
Registered
Joined
·
368 Posts
I think, if I recall correctly, if it's a sensor issue, it would also drop to Access Height when it triggers the fault. I believe the solenoid valve is the lower image, but don't go throwing parts at it just yet! Do you even know if you have an AMK compressor vs. a Hitachi?

The ABSOLUTE first thing you should be doing, and should have already done frankly, is ordering an IIDTool. Even if it's as simple as a faulty height sensor. Great, cheap part, easy install....then what? You have to recalibrate the EAS. You need an IIDTool (or equivalent even through there is no equivalent) to do so.
 

·
Registered
Joined
·
12 Posts
Discussion Starter · #9 ·
I am looking to purchase a scan tool hopefully by the end of this week, by the sounds of it im flying blind without it.
An update now i have had the car over a week really happy with the car and the wife loves it so that's a bonus. I have noticed that every morning I start the car the suspension will work until I start driving but once I start driving the fault will be there beeping for the remainder of the day, the next morning its like it resets itself over night or it could be a symptom of the problem.
I'll post my fault codes here once I receive my scan tool.
 

·
Registered
Joined
·
368 Posts
The resetting when power is cycled is normal. Listen, if you are going to buy some $50 scan tool you are wasting time and money. Whatever you buy has to be able to read/clear codes, obviously, but if it can't calibrate the air suspension, then you are going to have to take it to the dealer to get that done. So now, the money you think you saved by buying a cheaper scan tool is going to be spent on labor at the dealer. You would be better off buying a more capable scan tool, that way your extra $ go into something that will serve you well while you own the LR3.

There are maybe three scan tools that can do this. What did you order?
 

·
Registered
Joined
·
12 Posts
Discussion Starter · #11 ·
I was thinking about purchasing this one only because he is selling it locally hardly used and it says it reads air suspension but not sure how to know if it will calibrate the suspension, I might email the icarsoft.
Here is the link to the I930
 

·
Registered
Joined
·
12 Posts
Discussion Starter · #13 ·
I sent them a email to confirm, lucky I did they said it doesn't support suspension calibration. I'm now going through OBD Australia now. Sent them the same email to confirm.
 

·
Registered
Joined
·
368 Posts
Sounds like the EAS Control Module. I don't remember if that is one of the boxes that is susceptible to getting wet if you have a water ingress issue through the usual spots (sunroof drains, A-Pillar, Windshield cowl) but that is what I'd suspect.
 
1 - 20 of 21 Posts
Top