Special tools, test equipment, and skills are required to diagnose problems with the LSPV, so it is advisable for home mechanics to take the vehicle to a dealer service department or a properly equipped shop for such diagnosis. If the LSPV is found to be faulty, it can be replaced as a unit without disassembling it. Begin by removing as much brake fluid as possible from the master cylinder reservoir using a syringe. Next, raise the rear of the vehicle and support it securely on jackstands, blocking the front wheels to prevent rolling. Remove the
Brake Lines from the LSPV and take out the LSPV assembly along with the load sensing spring and stay as a single unit. Before installing the new LSPV, apply multi-purpose grease to the upper and lower joint of the load sensing spring. The installation process is the reverse of removal. Finally, fill the master cylinder reservoir with brake fluid and bleed the air from the brake system.