Hi guys,

Just joined the forum. After some research, I decided to gamble a few thousand buck and pick up the cheapest running LR3 I could find in the US. It's a 2006 V8 HSE. I'm troubleshooting the various system messages now & could really use your help. I have 2 issues (that I know about) but only one am I very concerned about for now. I don't current have a scanning tool capable of reading non-engine related codes. Being that it's the weekend, I'm troubleshooting the old fashioned way

Current State:
- Tire Pressure Monitoring System Fault
- Suspension System Fault
- Cannot change driving modes, raise or lower the vehicle.

Troubleshooting Steps (Suspension):
- Compressor does not seem to run at startup or at any time during normal function.
- Completed a "hard reset" of the electronics by allowing the vehicle to enter the dormant mode, then dispensing all electricity. No change in results.
- Examined the 5A EAS related fuse. Appears to be functioning.
- Noticed a 15A EAS related fuse may have been missing. Inserted 15A fuse. No change in results.
- Tested the EAS Relay using multimeter and 12v. Results indicate the relay is functioning as intended.
- Opened the 4x4 screen on the navigation. No warnings or indicators are present.
- Examined Compressor. It's an AMK unit. The bracket appears to have a date of 2016 on it.
- Unplugged compressor power & data. Using a 12V power supply, powered up the compressor. Unit turns on and appears to run.

I'm scratching my head here. Although I've only had the vehicle for a day, I haven't witnessed any changes in suspension height. I'm at a loss of what to check for next. Should I open up the valve block & examine? Why won't the system turn on the compressor? When I apply power, it seems to run just fine.

 

A GAP tool is essential especially troubleshooting the EAS. Trust me, it'll pay for itself and has a crazy amount of ability.

The TPMS fault is not related to the suspension faults. 1st obviously check your tire pressures, including the spare. Side note, you can disable the TPMS system with a GAP tool.

The suspension fault sounds like cross articulation and/or needs to be recalibrated. Again, the GAP tool has a full guided feature for doing this.

 

Blackngold,

That's good to know regarding the TPMS. I checked the pressures at all 4 corners, but the spare didn't even cross my mind!

Dang, I was really hoping I wouldn't have to pony up for the GAP tool, but the more I research, the more it sounds like it's a must have.

Any additional troubleshooting steps you would recommend prior to purchasing the GAP tool?

 

I recently purchased the gap tool and have several codes that I was unaware of for suspension. There are no check engine lights on or otherwise. Should I clear all the codes?

 

All fault codes are not equal. I'd suggested you read the faults, use the 'email to yourself' function on the bottom of the IID screen (assuming you're using a BT IID tool with IOS - I have no idea what the other interfaces look like) so you have a record, clear all faults and drive it for a bit then check again and see what's come back.

 

Yes, I'm using the IIDTool BT with Android. I'm going to send codes email, clear then drive. Great recommendation!! Thanks again

 

Since the compressor can be powered up and ran i would be tracing the wiring best you can to see if there is a break somewhere, i'd also try another relay just in case.

 

loanrangie,

I think that's a good idea. The relays are relatively cheap. I'll swap it out just in case & start running continuity checks on the wiring.

 

Makes sense. Which relay (s) do you suggest? Who is best supplier?

 

Chris,

I'm not certain which supplier is best. I picked up a new-old-stock relay that said Ford on it. I tried it: didn't make a difference.

UPDATE:
- I removed the 70A relay & directly wired across the ports via a wire with a 30A in-line fuse. Compressor turned on, no problem.
- Vehicle still refused to raise. I let compressor run for 1 minute, then shut it off. Let it cool for 5 minutes, then ran again for 30 seconds. Still, the vehicle would not raise.
- This morning, I start the vehicle. All of a sudden, I hear the compressor kick on. No suspension fault is displayed on the dash. Vehicle does not appear to be lifting.
- As I'm driving, out of my neighborhood, the amber suspension fault turn to red when I exceed 30 mph. I pull over & hop out. Lo and behold, the suspension had raised!!

WTH?!?! I'm certainly baffled. I've ordered the GAP IID Tool. It should arrive next week.