Brake Proportioning/Combination Valve: Testing and Inspection

Fig. 8 P-valve Pressure Test:

Fig. 9 Pressure Test Chart:

Refer to Fig. 8 for the following test.
1. Install LSPV gauge 09709-29017, or equivalent and bleed out air.
2. Raise master cylinder pressure and check pressure at rear wheel cylinders, compare to chart in Figs. 9. If pressure is incorrect, replace P and B valve.
3. Bleed brakes. Check for leaks.