Brake Proportioning/Combination Valve: Testing and Inspection

ON-VEHICLE INSPECTION





1. Install LSPV gauge Special Service Tool (SST) 09709-29018 or equivalent, and bleed air.
2. Bleed air from fluid pressure gauge.
3. Raise master cylinder pressure and check rear caliper pressure.
Master cylinder fluid pressure:
2,942 kPa (427 psi)
7,845 kPa (1,138 psi)
Rear brake caliper fluid pressure:
2,942 kPa (427 psi)
5,884 kPa (853 psi)
If the rear brake caliper pressure is incorrect, replace the P valve assembly.
4. Bleed brake system.
5. Check for leaks.