So if the pump will fill the system and function correctly then most likely we have an issue with a height sensor that is telling the module that the vehicle is lower then it actually is.
If the system drops then you have a pump issue or a leak. If you find a leak and fix that and still does not fill the system then most likely the leak caused the pump to burn up and it needs replaced now as well.
However, we need to check the voltage coming from the ride height sensor. Basically the sensor voltage will increase and decrease as the vehicle moves up and down.
https://www.2carpros.com/articles/how-to-check-wiring
Otherwise you will need to use a scan tool to monitor the position of the vehicle and make sure that matches the actual ride height.
I am attaching the wiring diagrams below for your review. Please let us know what you find or if you have questions. Thanks
Images (Click to make bigger)
SPONSORED LINKS
Tuesday, August 31st, 2021 AT 1:28 PM