4-inch Diagnosis
WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
MODE DESCRIPTION CHART
| Mode | Mode Description | Diagnosis Period |
|---|---|---|
| Mode Z (Purge control solenoid valve opening failure diagnosis) | Perform purge control solenoid valve opening failure diagnosis from the size of tank pressure variation from diagnosis start. | 0 ms + 3000 ms - 0 ms + 3000 ms + 13000 ms |
| Mode A (Estimated evaporation amount) | Calculate the tank pressure change amount (P1). | 10000 ms |
| Mode B (Sealed negative pressure, large leakage judgment) | Decrease the pressure in the tank to the target value by introducing the intake manifold pressure to the fuel tank. If the tank pressure cannot be reduced, it is diagnosed as large leak. | 0 - 10000 ms + 25000 ms |
| Mode C (Pressure increase check, advanced OK judgment) | Wait until the tank pressure returns to the target (start level of P2 calculation). If the tank pressure does not become the value, make advanced OK judgment. | 0 - 18600 ms |
| Mode D (Negative pressure variation measurement, evaporation leakage diagnosis) | Calculate the tank pressure variation (P2), and obtain the diagnostic value using P1 found in Mode A. Perform the evaporation diagnosis using the diagnostic value. |
0 ms + 10000 ms |