LX570 AHC “Basics” - Added as sticky thread for AHC Issues (9 Viewers)

[guy80]

Hey all, got a new to me LX570, 2019 with 23k miles. Changed the AHC fluid and set AHC Height Offset to Zero via Techstream.
The AHC fluid bleed is really straight forward. I definitely overthought it. Didn't end up changing the 5th accumulator, got lazy.

Curious what the best way to set the height is.. AHC sensors, Techstream, or Torsion?

Factory spec says:
19.75 front
20.5 rear

I measure:
the driver side (left) is lower than the passenger (right)
Front L: 19.75
Front R: 20.5 - passenger
Rear L: 19.75
Rear R: 20.5 - passenger

Thinking I should adjust the physical sensors based on the Height Control Sensor readings - all different numbers

 

[radman]

Hey all, got a new to me LX570, 2019 with 23k miles. Changed the AHC fluid and set AHC Height Offset to Zero via Techstream.
The AHC fluid bleed is really straight forward. I definitely overthought it. Didn't end up changing the 5th accumulator, got lazy.

Curious what the best way to set the height is.. AHC sensors, Techstream, or Torsion?

Factory spec says:
19.75 front
20.5 rear

I measure:
the driver side (left) is lower than the passenger (right)
Front L: 19.75
Front R: 20.5 - passenger
Rear L: 19.75
Rear R: 20.5 - passenger

Thinking I should adjust the physical sensors based on the Height Control Sensor readings - all different numbers

why are you messing with AHC if she only has 23k miles? Just drive her and enjoy
are you sure you're on completley level ground when you measured the corners?

You also said you "set the height offset to zero" in techstream. why did you do that? that could be why your measurements are off.

 

[tbisaacs]

Hey all, got a new to me LX570, 2019 with 23k miles. Changed the AHC fluid and set AHC Height Offset to Zero via Techstream.
The AHC fluid bleed is really straight forward. I definitely overthought it. Didn't end up changing the 5th accumulator, got lazy.

Curious what the best way to set the height is.. AHC sensors, Techstream, or Torsion?

Factory spec says:
19.75 front
20.5 rear

I measure:
the driver side (left) is lower than the passenger (right)
Front L: 19.75
Front R: 20.5 - passenger
Rear L: 19.75
Rear R: 20.5 - passenger

Thinking I should adjust the physical sensors based on the Height Control Sensor readings - all different numbers
View attachment 3979448

The 570 doesn't have torsion bars fyi

 

[guy80]

why are you messing with AHC if she only has 23k miles? Just drive her and enjoy
are you sure you're on completley level ground when you measured the corners?

You also said you "set the height offset to zero" in techstream. why did you do that? that could be why your measurements are off.

The tank was low, when I put it in High there was NO fluid in the reservoir.
The fluid was pretty dark but not solid black as some photos online. Also got quite a bit of air out of the lines.

Level ground is a good question. Probably not. Just a garage floor.

I tried to adjust the corners in Techstream before the fluid change and didn't measure any difference. Figured I better start from zero at this point.

 

[guy80]

The 570 doesn't have torsion bars fyi

Well that makes this easy. Techstream it is!

although I may do a sensor lift first