Got the normal ride hight only fault at start up this morning. Drove a couple miles to work and back, no issues but fault has remained. Scanned codes and got the following:

C1A26-16 (2E) Temperature sensor circuit - General electrical failure - circuit voltage below threshold

At 409300 km



C1A27-12 (AF) Compressor circuit - General electrical failure - circuit short to battery

At 409298 km



C1B21-1C (2E) Compressor brush card temperature sensor circuit - General electrical failure - circuit voltage out of range

At 409300 km

Battery voltage is around 12.5 when off and in the 13’s at idle. So battery seems fine. I cleared codes but C1A27 came back. Compressor has not been loud and I haven’t noticed it running much except at start up after sitting for a while. It might run around a minute which might be to long but the fault popped up this morning before the compressor had a chance to do much.

Thoughts?

 

Update

Started up this morning and got the suspension fault. Backed up the truck and got an extended mode warning and then an all special programs off warning.

By the way, I am having a rear sway bar bushing and links replaced today but not thinking those failing has anything to do with it.

Measured the overnight suspension drop and it is around a half inch all four corners.

This is probably obvious but the truck is not self leveling and the compressor does not run as far as I can tell.

I will check for additional codes this evening.

tks

 

Did you pull power or EAS fuses last night in support of your overnight measurement?

 

I did not pull the fuse. But I figured since it doesn’t seem to be self leveling it wouldn’t matter. I can certainly do that tonight.

Do the codes seems to indicate something in particular?

tks

 

Just checked faults again now that rear sway bar bushings are done. Two faults now.

C1A20-64 (6C) Pressure increases too slow when filling reservoir - Algorithm based failure - signal plausibility failure
At 409304 km

C1A27-12 (28) Compressor circuit - General electrical failure - circuit short to battery
At 409304 km

interestingly after getting back from the shop, the front has dropped by another quarter inch but the rear has raised by a quarter inch. Not sure how that can happen.

 

My point is that if you didn't pull power/fuse then you don't know if you have a leak or not. The dropping of the 1/2 inch could be a result of the self-leveling The EAS sort of "chases itself down" in some cases.

 

Got it. Fuse 26e has been pulled and will measure again.

 

Happen to be a 2005/06 model year? I ask because some of this very much looks like suspension harness damage. It could be that the connectors are not snapped together. But it could be that the harness has worn into the frame horn. This thread shows what can happen and where.

https://landroverforums.com/forum/lr...tarted-111814/

 

It is in fact a 2006. I didn’t get a code for a pressure sensor. But would it be correct to say the wires in question deal with a lot more than just the pressure sensor? I’m guessing so since I don’t think the compressor even tries to run.

By the way, could it be a fuse or the compressor relay that would cause this? I will check the fuses but not sure how to check a relay.

By the way, im a novice when dealing with electrical issues. I’ve replaced some water pumps, belts, etc but that’s about it. Would like to figure this out on my own if I can. Learning as I go.

Will know more about leaks tomorrow morning.

 

With fuse pulled, from dropped about a half inch and rear about an inch since noon yesterday.