So when you hit the button, no arrows either direction happen on the screen? I would check Techstream for hidden DTCs to see if the suspension ECU is disabling the lift/lower functions. There is not a "reset the high and low values" in Techstream. Techstream will also tell you what height the sensors think you are at now. I wonder if your lift has pushed a sensor into a state where the ECU thinks it's "out of range" in a way.
I will say, that i have experienced the system acting strange directly after a sensor move as well. I want to say, i was in a similar state of being in L with truck reporting N and no movement with the button after the last time i messed with sensors. I used the AHC utility to force the truck to lift, so that when it read N, it was actually near a N height. Then i drove around for a few days and everything went back to normal for N, L and H.
Almost always it’ll indicate that it’s trying to get into hi or low (and you’ll see the h or l).
It’ll, most of the time, just get stuck in that transitory position on the screen. It’ll indicate that it’s trying to get into hi or low.
even though it almost never REGISTERS as hi or low, the vehicle has ACTUALLY entered its hi or low status. Sometimes it’ll actually register as being in hi or low but not often.
After several months of just dealing with AHC not being happy that it’s 0.5” higher than it wants to be, today it decided even though it was in low, that it was going to register as neutral and no amount of pushing the paddle up or down would change its mind…
I turned ahc off and on (or attempted to)
I restarted the vehicle several times
I put it in low range and drove a bit.
I drove it in 4hi at speed.
Nothing fixed it until I let the car sit for 20-30 minutes…then it went back to its previous slightly messed up state.
Ideally I’d like to “re-set” the ahc values so the car recognizes its new hi, neutral, and low positions.
I got into the ahc section of the techstream at one point, but it asked me to input values of some sort and I don’t know what types of values I should input so I didn’t mess with it.
Anyone know what ahc values to input to teach the system it’s new positions?
