LS 400 V8-4.0L (1UZ-FE) (1990)
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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 according to SERVICE AND REPAIR/BLEEDING/PROCEDURE. Check for leaks.
