A little Help

Normally I am very capable of diagnosing my own vehicle, but right now I am 3500 miles from it and my wife is driving the LR4 (2011).
before I left it was getting an intermittent Air Suspension fault, driving modes unavailable as well.
Pulled the codes, and got a EAS Module communication issue. I chalked it up to a low battery. Cleared the code, checked the battery health (was very good). It did not happen again.
Wife calls me today: same message, but now also check engine light, no abs, no traction control, no parking brake....
Any ideas what could be causing this? Low battery (it has been cold as of late, but we live in Maine so not unusually cold).
Any ideas of potential checks? Should I take it to the dealer?

My guess is still a low battery. I was getting weird random warning lights that would come and go. And the clock kept changing to military time. Yet the 4-year old battery checked out fine. I decided to replace it anyway and all has been fine since.

On the LR3, when most of the warning lights lit up we called it the "Christmas Tree of Death". The cause was usually the failure of the $40 brake switch.

If it's not the battery or brake switch, you may need the dealer's help to figure it out.

PaulLR3 said:

My guess is still a low battery. I was getting weird random warning lights that would come and go. And the clock kept changing to military time. Yet the 4-year old battery checked out fine. I decided to replace it anyway and all has been fine since.

On the LR3, when most of the warning lights lit up we called it the "Christmas Tree of Death". The cause was usually the failure of the $40 brake switch.

If it's not the battery or brake switch, you may need the dealer's help to figure it out.

Click to expand...

I still have yet to hear of a brake switch fixing anything on an LR4. Is that still a valid issue/fix for LR4? Did it have something to do with non-led rear lights and other parts of the electrical system?

I tend to agree that the (FoMoCo) brake switch issue was so bad on the LR3's that LR switched to a different brake switch on the LR4.

On the LR3, black dust would build up inside the brake switch and short it out. Since the brakes are integrated with the terrain response, HDC, etc., that $40 part would cripple an LR3. Ours went bad on the GW Bridge in heavy summer traffic. I managed to crawl off the bridge and limp down the shoulder to a rest stop. Thankfully I had a spare brake switch with me and it took about 2 minutes to change it.

Brake switch is still the same FoMoCo blue/white assembly... Perhaps we haven't heard of it failing in the LR4 - yet - because it is a newer car. Or, perhaps they made the circuit smart enough to identify a bad switch without causing a cascading effect of faults with all other systems.

Do these faults all pop up at startup? If so, I would also suspect a bad battery first.

umbertob said:

Brake switch is still the same FoMoCo blue/white assembly... Perhaps we haven't heard of it failing in the LR4 - yet - because it is a newer car. Or, perhaps they made the circuit smart enough to identify a bad switch without causing a cascading effect of faults with all other systems.

Do these faults all pop up at startup? If so, I would also suspect a bad battery first.

Click to expand...

It does happen right at startup.
I have ordered a switch, but also an appointment at the local dealer.
It had a new battery about 1 year ago, but it is possible it has gone sour already.

I will let everyone know what the fix ends up being.


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Do you have the part number for the switch?