AHC reset or calibration procedure???

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Joined
Dec 25, 2018
Threads
16
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397
Location
Ohio
2007 GX

Rear height sensor broke so auto-leveling wasn't working. Bought two brand new sensors and set them up to length of old ones and adjusted slotted nut height until I got 20.75" center of wheel to fender flare on both sides, cycling the manual switch to "hi" and "low" several times to make certain it always returned to 20.75" in "Normal" position. I then loaded up a ~600lb motorcycle on my hitch carrier and started the truck and waited for it to auto-adjust to normal like it'd done dozens of times before the sensor broke. After two minutes I had to use the manual override to get it raised then proceeded to deliver the bike to its owner. When I unloaded the bike, my rear end was now sky high due to all the extra air but because it's not auto-leveling anymore it was stuck like that...

Is there a reset or calibration procedure for new sensors I'm not aware of? The system seems to be acknowledging their presence vis-a-vis my ability to adjust their position and effect "Normal" height coming back from the hi or low setting, but for some reason it's no longer automatic in operation, which is a bummer as I depend on these bags to be able to haul bikes around. Before the failure it would auto-adjust up or down within 20sec of a change in load.

Thanks in advance for any input/advice!
 
After much research, a session with JustAnswer, and a 2-day subscription to TIS, I have a solution (I hope) that doesn't even require TechStream, though the Lexus tech insisted this could be done through it as well. If you've replaced your height sensors you'll need to calibrate them as follows:

Screenshot_20191110-133422.jpg
 
There is a way to do techstream Here in mud
 
There is a way to do techstream Here in mud

Thank you for the reply, I've searched and searched and found nothing. Does TS display the voltage in real time for the purpose of calibration?
 

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