Diagnostic Method
WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
- Abnormality Judgment
Judge as NG if the criteria below are met.
JUDGMENT VALUE
| Malfunction Criteria | Threshold Value |
|---|---|
| Engine coolant temperature | < 20 °C (68 °F) |
| Timer for diagnosis after engine start | ≥ Judgment value of timer after engine start |
Timer for diagnosis after engine start
- Timer stop at fuel cut
- During the driving conditions except a) above, timer counts up as follows.
64 ms + TWCNT ms (when at 64 ms)
TWCNT is defined as follows,
TWCNT = 0 at idle switch ON,
TWCNT show on the following table at idle switch OFF.
| Vehicle speed km/h (MPH) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 0 (0) | 8 (5) | 16 (9.9) | 24 (14.9) | 32 (19.9) | 40 (24.9) | 48 (29.8) | 56 (34.8) | ||
| Temperature °C (°F) | -20 (-4) | 0 ms | 37.136 ms | 74.272 ms | 111.41 ms | 126.66 ms | 141.91 ms | 163.59 ms | 185.26 ms |
| -10 (14) | 0 ms | 27.391 ms | 54.782 ms | 82.173 ms | 99.65 ms | 117.13 ms | 135.96 ms | 154.8 ms | |
| 0 (32) | 0 ms | 17.646 ms | 35.292 ms | 52.938 ms | 72.64 ms | 92.341 ms | 108.34 ms | 124.33 ms | |
| 10 (50) | 0 ms | 7.9012 ms | 15.802 ms | 23.704 ms | 45.63 ms | 67.556 ms | 80.711 ms | 93.867 ms | |
| 20 (68) | 0 ms | 7.9012 ms | 15.802 ms | 23.704 ms | 45.63 ms | 67.556 ms | 80.711 ms | 93.867 ms | |
Judgment value of timer after engine starting
t = 451056 ms - 25870 ms x Ti
Ti : The lowest coolant temperature after engine start
Time Needed for Diagnosis: Less than 1 second
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgment
Judge as OK and clear the NG when the malfunction criteria below are met.
JUDGMENT VALUE
| Malfunction Criteria | Threshold Value |
|---|---|
| Engine coolant temperature | ≥ 20 °C (68 °F) |
Time Needed for Diagnosis: Less than 1 second