INSPECTION AFTER REMOVAL Appearance Check for correct assembly, damage and deterioration. Check Valve Airtightness

- Use a handy vacuum pump (A) to check.

  When connected to the booster side (B):
  | Vacuum must be decrease within 1.3 kPa (9.8 mmHg, 0.38 inHg) for 15 seconds under a vacuum of −66.7 kPa (−500 mmHg, −19.69 inHg).
  When connected to the engine side (C):
  | Vacuum must be not exist.

- Replace vacuum hose assembly if vacuum hose and check valve are malfunctioning.