QX56 V8-5.6L (VK56DE) (2004)
Vacuum Brake Booster Check Valve: Testing and Inspection
Inspection
VISUAL INSPECTION
Check for improper assembly, damage and deterioration.
CHECK VALVE INSPECTION
Airtightness Inspection
Use a suitable vacuum pump to check. Connect to brake booster side of check valve.
Check valve specification: Vacuum decrease should be within 1.3 kPa (10 mmHg, 0.39 inch Hg) for 15 seconds under a vacuum of -66.7 kPa
(-500 mmHg, -19.69 inch Hg)