Mode C: (Check increasing pressure)
Stop the introduction of negative pressure. (Wait until the tank pressure returns to the start level of P2 calculation.)
Change to Mode D when the tank pressure returns to the start level of P2 calculation.
Judge immediate OK and change to Mode E when it does not return in spite of spending the specified time.
MODE C (CHECK INCREASING PRESSURE)
| Tank pressure when P2 calculation started | Time for immediate OK judgment |
| -1.3 kPa (-9.75 mmHg, -0.38 inHg) | 17 seconds |