Hey everyone, I think I fixed my EAS problem. I have had an issue with the truck lowering all the way to the stops if it sits for a couple of days. I thought I may have a slow leak somewhere and might need to replace a valve or something. Well, I tried something that I thought might work if I understood how this tricky system worked. Believe me I still don't quite understand everything. :-) What I did was purchase a Gap Diagnostics EAS control. With this I was able to see where the ECU was seeing my sensors. there was one sensor(right front) that was about 20mm different in height than the left front. From what I read, When the truck is parked the ECU wakes up every so often and looks at where the sensors are reading. If they are off by more than 10mm the ECU will adjust down everytime,, Soooo If the ECU wakes up 8-10 times a night it will lower it further and further until it hits the stops.. So what I did was used the control to recalibrate the truck in the standard mode and then used the unit to raise the truck up 1-1/2 for bigger tires 265/65/18 Falken Wild Peaks. Since i have done this, the truck has not lowered at all.. :-) I would welcome any comments to this,, i may be wrong in my way of thinking, but it sure seems to have fixed my problem..

 

Good catch.

 

Hmmm. So it is safe to say that it isn't a height sensor? The computer is pulling information from those sensors, why would it automatically change the values, and then fault itself?

I'm currently prospecting LR3s, this is good info to know.

 

yeah something smells fishy here...

 

from what i can tell, The truck was lowering because of the 20mm difference between the two front sensors. When I did the calibration, I changed the settings compared to what the ECU was reading and what was actually measured at the wheels,, I reprogrammed the settings to the new, keeping it within the 10mm and then raised the truck by about 3cm. Now the ECU sees less than the 10mm difference it allows before it starts to lower. My guess is that whomever owned the truck before me might have changed out one of the sensors and never calibrated it??? Not sure though.. One thing to note is that the ECU allows up to 10mm difference between sides before it starts doing the self lowering of the truck,, from what I was told is that with a 20mm difference, the ECU sees a bad reading.. My friends front sensors read 190 for the left and 195 for the right, but the measurements that are taken at the wheel are the same on both sides. His is calibrated correctly, so no problems. unless his sensors ever read a more than 10mm difference, it won't have the lowering issue like I had. Again, this is just me guessing but I love the fact that it has sat for 3 days and has not dropped at all since I did this. :-)

 

I found this in a LR3 manual. Read the self leveling part

 

That's great to know, thanks.

So is there a calibration step for installing new height sensors, or even a recalibration for existing sensors? If so, wouldn't it be easier to do that than adjust the individual sensors to the ECUs tolerances?

Jesus, every two hours? How are these cars not automatically equipped with dual batteries from the factory?

 

Okay but why wouldn't it just lower or raise at the individual corner that is out of whack, rather than lowering the entire truck to the bumpstops? That seems dumb...

 

thats why you disconnect the battery when testing for leaks. If its electric in nature a battery disconnect will prevent wakeup. Normal everyday diag we have been doing since the dawn of the range rover classic.

 

thanks