Judgment Value
MALFUNCTION CRITERIA AND THRESHOLD VALUE REFERENCE
| 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 milliseconds + TWCNT milliseconds (the time of at 64 milliseconds)
TWCNT is defined as follows,
TWCNT = 0 at idle switch ON,
TWCNT show on the following table at idle switch OFF.
VEHICLE SPEED AND TEMPERATURE SPECIFICATION
| Vehicle speed km/h (MPH) | |||||||||
| 0(0) | 8 (4.97) | 16(9.94) | 24 (14.9) | 32(19.9) | 40 (24.9) | 48 (29.8) | 56 (34.8) | ||
| Temperature °C (°F) | -20 (-4) | 0 ms | 32.076 ms | 39.977 ms | 47.879 ms | 82.544 ms | 117.209 ms | 154.214 ms | 185.260 ms |
| -10(14) | 0 ms | 25.704 ms | 33.606 ms | 41.508 ms | 68.520 ms | 95.532 ms | 125.667 ms | 155.802 ms | |
| 0(32) | 0 ms | 17.646 ms | 25.548 ms | 33.450 ms | 53.652 ms | 73.855 ms | 97.120 ms | 120.386 ms | |
| 10(50) | 0 ms | 7.901 ms | 15.802 ms | 23.704 ms | 37.941 ms | 52.177 ms | 68.573 ms | 82.538 ms | |
Judgment value of timer after engine starting
t = 574 - 33 x Ti (seconds)
Ti: The lowest coolant temperature after engine start
Time Needed for Diagnosis: To be determined. (It is varied by the Min. engine coolant temperature and engine conditions such as vehicle speed and engine coolant temperature.)
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.