Mode B (Measurement of reference pressure for setting the target negative pressure)
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.
- Purpose: Judge the reference pressure stability.
Judge as NG when the following conditions are established.
JUDGMENT VALUE REFERENCE CHARTMalfunction Criteria Threshold Value DTC Elapsed time after mode change ≥ 40s P2404 | Pressure sensor maximum output value - Pressure sensor minimum output value| > 0.3 kPa (2.355 mmHg, 0.1 inHg) - Purpose: Judge whether the reference pressure is within the normal range, and detect the vacuum pump and orifice malfunctions.
Judge as NG when the following conditions are established.
JUDGMENT VALUE REFERENCE CHART
| Malfunction Criteria | Threshold Value | DTC |
|---|---|---|
| Reference pressure for setting the target negative pressure | < Value of Map 2 or > Value of Map 3 |
P2404 |
ENGINE COOLANT TEMPERATURE REFERENCE CHART
| Atmospheric pressure kPa (mmHg, inHg) | 70 (525, 20.7) | 80 (600, 23.6) | 90 (675, 26.6) | 100 (750, 29.5) |
| Reference pressure for setting the target negative pressure kPa (mmHg, inHg) | -4 (-29.79, -1.2) | -4.1 (-30.593,-1.2) | -4.2 (-31.395,-1.2) | -4.3 (-32.19,-1.3) |
ATMOSPHERIC PRESSURE REFERENCE CHART
| Atmospheric pressure kPa (mmHg, inHg) | 70 (525, 20.7) | 80 (600, 23.6) | 90 (675, 26.6) | 100 (750, 29.5) |
| Reference pressure for setting the target negative pressure kPa (mmHg, inHg) | -0.9 (-7.065, -0.3) | -1 (-7.86, -0.3) | -1.2 (-8.663, -0.3) | -1.3 (-9.465, -0.4) |