4.8is Ride Height Calibration

[Ricky Bobby]

Tires are all inflated to same measurement

[sockethead]

What is the reason is for the inactive message in DIS?

[Ricky Bobby]

Working on getting that for you socket, my DIS cable is in the mail as we speak on its way to me.

I actually went for a drive last night with the wife again and no error on the dash at startup, and no error during the drive or until I parked back in the garage again, so I don't think I have any major issues here (when my air compressor was dead the SELF LEVEL SUSP INACT never went away until cleared by DIS!), I'm thinking the large deviation in ride heights creates a "soft error" that may pop on and off, but not a level 2 error like the compressor being inactive, where when that error pops up it is more of a system failure and can not be cleared even by DIS unless you fix the problem.

Here are my current measurements again on each corner:

Drivers Rear: 698 mm
Drivers Front: 723 mm
Passengers Rear: 714 mm
Passengers Front: 742 mm

[Big "J"]

Originally Posted by Ricky Bobby

Working on getting that for you socket, my DIS cable is in the mail as we speak on its way to me.

I actually went for a drive last night with the wife again and no error on the dash at startup, and no error during the drive or until I parked back in the garage again, so I don't think I have any major issues here (when my air compressor was dead the SELF LEVEL SUSP INACT never went away until cleared by DIS!), I'm thinking the large deviation in ride heights creates a "soft error" that may pop on and off, but not a level 2 error like the compressor being inactive, where when that error pops up it is more of a system failure and can not be cleared even by DIS unless you fix the problem.

Here are my current measurements again on each corner:

Drivers Rear: 698 mm
Drivers Front: 723 mm
Passengers Rear: 714 mm
Passengers Front: 742 mm

RB, did you ever get this figured out? I'm need to set mine as well using INPA.

Thanks,

Jason

[Ricky Bobby]

Originally Posted by Big "J"

RB, did you ever get this figured out? I'm need to set mine as well using INPA.

Thanks,

Jason

Yeah man! Once I got INPA and GT1 loaded it was easy! I had a few errors from my last calibration and probably the suspension work, I initially tried to recalibrate with INPA but I'll be honest that program doesn't make that much sense to me (probably because I have more experience with DIS / GT1)

So I actually went into DIS (do you have both programs? I assume you do, I bought the Romanian cable with all the programs), cleared any errors from the EHC module, and there is actually a function that will allow you to raise/lower by corner, as well as raise/lower front or rear axle. It's not the entire calibration routine but after you set your corners up, there is another option which says

"Set zero point, default ride height" - front axle, rear axle


So what I did was lower and raise a couple of the corners to get them as even as I could, then I just "set zero point" on front axle and set on rear axle, haven't had a problem with my ride height since. I'm sitting perfectly at stock 4.8is height right now, and actually set a hair lower in the front to make a nice slightly forward rake look. About 28" wheel to fender at all corners though.

PM me if you have any problems Big J! Always ready to help a brotha out!

[Big "J"]

Sweet!
Yes, I have DIS and will get it running tonight. May have to get a Starbucks to stay awake while it loads....Zzzzz!

I tinkered with INPA last night and managed to get my rears to stay even at 28.5" but, the front left is 1/2" lower (27.5") than the right side. I too want a lower stance and will probably set them like TMV did.

Thanks for the tip and will let you know how it rides!

[Ricky Bobby]

Originally Posted by Big "J"

Sweet!
Yes, I have DIS and will get it running tonight. May have to get a Starbucks to stay awake while it loads....Zzzzz!

I tinkered with INPA last night and managed to get my rears to stay even at 28.5" but, the front left is 1/2" lower (27.5") than the right side. I too want a lower stance and will probably set them like TMV did.

Thanks for the tip and will let you know how it rides!

I hear ya, I drove myself crazy too, its never going to be perfect but should be within 1/4" or so from side to side, obviously assuming tires inflated the same and on level ground.

Also it will settle somewhat when driving, but like I said you can lower/raise one corner at a time then "set the zero point" on the axle you are done with, and that should work out nicely for you. it will take some playing around but you'll get it!

[brentdkelley]

Looked through the thread since I am about to have to calibrate the height on my wife's 4.8is. I just installed new front CV axles and all four air bags (popped rear when jacking up the front to replace the axles). Got rear bags replaced and the front popped... Has anyone here tried using the Autel MaxiDAS 708? So far I have used it for reading the sensors (front left voltage pegged, new sensor on the way). Works great for reading everything and raising and lowering each bag. Just curious is anyone else has experience with this.

[sockethead]

DIS is what I used. It has diagnostic routine as well as re calibration routine.
If your pump is coming on more that usual, you'll want to test for leaks. Have you replaced any of the bags yet?

[mopes]

The two front bags were replaced by a dealer about 5 years ago. Rears have never been replaced. 79k mile cali truck, 2004.

Pump comes on for about 1 minute in the mornings and sometimes comes at various times throughout the day. Because I've never owned an X with air ride suspension before I just get paranoid about what is normal and what is not when it comes to this system