AHC is off and LO status

[collector_edi]

Good morning gents,

I just had the rear axle housing tubing replaced and my AHC will not allow me to change from LO and the OFF indicator is on. Can you help a brother out?

 

[jdlsantos]

check the rear height sensor, if did you replaced the rear axle, is probable the sensor is not set properly, you could looking for into the FSM for the right sensor calibration, or you can try and test until you get what you want (if, only the rear sensor has been touched)

 

[collector_edi]

It turns out the system was low on oil. The reservoir was bone dry. Nice to know that that was the only issue and thank you jdlsantos for chiming in!

 

[sonk76]

It turns out the system was low on oil. The reservoir was bone dry. Nice to know that that was the only issue and thank you jdlsantos for chiming in!

I hope it was refilled with AHC fluid and not oil. I'm assuming that is the case, but I've heard stories of wrong fluids going there, which is probably not a good idea in the long run.

Very surprised to hear that the system was so low on fluid. Sounds like there may be a leak in the system somewhere. I have never observed the fluid level decrease over time in mine.

 

[collector_edi]

I did use the correct fluid. Purchased it directly from Lexus. I'm not sure if fluid was lost during the axle swap.

 

[agaisin]

I did use the correct fluid. Purchased it directly from Lexus. I'm not sure if fluid was lost during the axle swap.

or perhaps the reservoir was filled while in low?
did you drain or bleed the system as part of the swap? did it working properly after the refill and then you suddenly started having issue or ever since the swap/refill it hasn't worked properly?

I'd be more concerned about leak if it was working fine and ten suddenly started having issues. also if you have a leak you'll know soon enough if it drains again right?...