New member here. Trying to diagnose my LR3 with the often cited christmas tree lights on the dash. Any help would be appreciated.

I have a 2006 LR3 with 300k miles on it. I love my truck. It has given me a few issues over the years but mostly routine maintenance. Never leaked a drop of oil or left me on the side of the road so I can't complain.

The truck was running perfect. I left it outside during a really heavy rain because the garage was full with my wife's and kids' cars. My sunroof drains are apparently blocked up (how do you unblock them?) so the water came into the passenger side compartment floorboard and there was enough to be standing an half-inch or so on top of the carpet. The truck still started and ran fine. I dried it out in the Texas heat and thought it was good to go. I parked in the garage one night and the next morning went to start it and the errors and lights began. HDC fault, transmission fault, suspension fault, special programs off. Red parking light on and parking brake turned on. Suspension lowered to the bumps. When the parking brake is turned off, it beeps non-stop until I put it in drive and go. In drive, the suspension will raise a little bit and the truck drives perfectly (other than being a little on the lower side for the suspension but not too bouncy. it definitely comes up from the bumps). Transmission is fine. It runs, shifts, turns, and drives like normal.

So I read this forum and figured it was the brake switch. I changed it out. Same faults.

I next changed the rear brake light bulbs. same faults.

Next, I chased down the red wire in the passenger side floor board. There was 1/2" of water under the foam and in the side rail with all the wires. I dried it all out, located the red wire, it was still connected but corroded. I took it apart, cleaned it and put it back together. I tested the voltage at the brake switch. It was a solid 12v. Same faults.

I let it sit for several weeks while gone on vacation hoping it would dry out or magically forget. Same faults.

I did a hard reset with the battery. Same faults. I tested the battery and put a trickle charger on it. Same faults.

So i took it to the shop down the street and they hooked it up and found a page full of codes. They cleared most of them. But the following ones remain. I am hoping that someone on here can assist in figuring this out. My guess is the steering angle sensor. The shop is recommending the transfer case clutch actuator.

P1860 Clutch Actuator Stuck - (T-Case)
U0403 Invalid Data From T-Case - (ABS)
U0416 Invalid Data from Vehicle Dynamics Control Module - (Ride Level Control Module)
U0421 Invalid Data from Ride Level Control Module - (All Terrain Control Module)
B1B02 Low Freq Coil - (BCM)
B1C57 Passive Start Ignition Relay Coil - (BCM)
Steering Column Module: B1B02, B1C44, B1C57, B1D12

Please let me know if you need any additional information. Thank you in advance for any help y'all might be able to provide.

Cheers!

Jason

 

after doing a little more research, it looks like the codes that showed up under the Steering Column Module relate to the low freq coil, rear wiper park, volumetric alarm power, and passive start ignition rely. Is there a code for the steering angle sensor?

 

The shop said there was no code for Steering Angle Sensor error. So my best guess is it is the clutch actuator on the TC or the TCCM. Any feedback?

 

Just to add a bit more info, there have been no clanks or anything from the TC. It was driving really smooth and totally normal. The shop is recommending the clutch actuator and updating the software. Could it just need a software update?

 

I am having the shop inspect and clean the TCCM first and if it does not resolve the codes, replace the clutch actuator and update the software. I will report back the results.

 

update.

The shop inspected the Transfer Case Control Module and did not see any signs of corrosion or anything out of the ordinary.

The shop replaced the Transfer Case clutch actuator but it did not fix the truck. The same codes and warnings and lights are still on. They removed the new one and put the old one back on.

Sooooo, given my codes, does anyone have ideas? The TCCM is not communicating with the code reader. It is throwing an invalid data code under ABS. Does that mean that despite it not appearing bad, that is is? For those that replaced their TCCM, did you have a code indicating that was the issue?

Also for those that had ABS sensor issues, did it have a code indicating that was the issue?

Any other ideas?

THANKS in advance.

 

ABS sensor will throw a code. For the TCCM it might be that yours was swapped and that's why you are getting the invalid code. Usually you will have some comm codes between TCCM and other modules if faulty.

What reader are you using?

Do you have a rear locking Diff?

 

Thanks for the response!

I am not sure what reader the shop is using but I will ask and report back. As for whether I have a rear locking diff, I have whatever is stock on the V8SE LR3.

I have not swapped the TCCM. I have had the truck since it was new. The transfer case was replaced 18 months ago but there were no problems until two months ago after the big rain and all the water came into the passenger footwell. So you dont think its the TCCM? There is a Transfer Case error that the clutch actuator is stuck and then an error of invalid data from the TC.

So no on the ABS sensor since no code. Any recs on where to look next?

 

I would try and re calibrate the TC actuator. But it seems the shop cant communicate with the TCCM, so not sure what to do there.

You can swap in a used TCCM without coding. You will get a fault that is stored saying incorrect VIN, but nothing on the dash.

 

I have a 2009 LR2 which is demonstrating the same warnings, lights that you describe. The only common code we both have is the Invalid data from the ABS… I started experimenting problems initially after a huge snow storm, I had been driving in it and water, ice, snow, etc. was everywhere. After further examination, I realized the front right cv axle bracket mount bolt had broke off, which I believe would cause for some play in that wheel. I replaced the mount, the bolt, the hub, the control arm, tie rod, ball joint, strut, yet I am still getting the same results. I also had front right wheel speed sensor code and even replaced the wheel speed sensor with no change.