The Relation Between DTC and Driving Pattern
OBD-II SYSTEM OPERATING CHARTThe relation MIL, DTC and Driving pattern
1) In the case of MIL ON
2) In the case of MIL OFF
1. When the same malfunction is detected and maintained during subsequent sequential two trips, MIL will automatically light up.
2. MIL will go off automatically after 3 subsequent sequential trips without same malfunctions.
3. When a malfunction is detected for the second time, the DTC and the freeze frame data will be stored in ECM.
4. When the same malfunction is detected and maintained during subsequent sequential two trips, MIL will automatically light up.
5. MIL will go off automatically after 3 subsequent sequential trips without same malfunctions.
6. When a malfunction is detected for the second time, the DTC and the freeze frame data will be stored in ECM.
7. The DTC and the freeze frame data will not be displayed any longer after 80 warm-up cycles without the same malfunction.
NOTE:
1) A "trip" means vehicle operation (following an engine-off period) of duration and driving mode such that all components and systems are monitored at least once by the diagnostic system except catalyst efficiency or evaporative system monitoring when a steady-speed check is used, subject to the limitation that the manufacturer-defined trip monitoring conditions shall all be encountered at least once during the first engine start portion of the applicable FTP cycle.
2) A "warm-up cycle" means sufficient vehicle operation such that the coolant temperature has risen by at least 40° Fahrenheit from engine starting and reaches a minimum temperature of 160° Fahrenheit.
3) A "driving cycle" consists of engine start-up, vehicle operation beyond the beginning of closed loop operation.