Villager V6-201 3.3L SOHC VIN T SFI (1999)
Vacuum Brake Booster Check Valve: Testing and Inspection
Check the brake booster hose and vacuum hose for cuts, abrasions and cracks.
If any of these conditions exist, install a new brake booster hose and vacuum hose.
Using Vacuum Tester, apply a vacuum to the brake booster side of the of the power brake booster check valve. If a vacuum does not exist, install a
new power brake booster check valve.