| DTC Strategy |
Case 1 |
- Internal timer performance monitoring after ECM power off (if late)
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- Poor connector connection
- Poor battery condition
- Faulty ECM
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| Case 2 |
- Internal timer performance monitoring after ECM power off (if fast)
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| Enable Condition |
Case 1 |
- The preheating condition was satisfied in the previous trip (coolant temperature higher than 56°C)
- Intake temperature deviation of higher than 0°C (difference between the temperature when the previous ignition is off and the temperature when the ignition is on)
- Coolant temperature deviation higher than 40°C (difference between the temperature when the previous ignition is OFF and the temperature when the ignition is ON)
- Difference between the coolant temperature and the ambient temperature is over 30°C (difference between the coolant temperature when the previous ignition is OFF and the outside temperature when the ignition is ON)
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| Case 2 |
- The preheating condition was satisfied in the previous trip (coolant temperature higher than 56°C)
- Intake temperature deviation of less than 40°C (difference between the temperature when the previous ignition is off and the temperature when the ignition is on)
- Coolant temperature deviation less than 3.8 - 15°C (difference between the temperature when the previous ignition is OFF and the temperature when the switch is ON, depending on the cooling water temperature when the ignition is OFF)
- Difference between the coolant temperature and the ambient temperature is over 30°C (difference between the coolant temperature when the previous ignition is OFF and the outside temperature when the ignition is ON)
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| Threshold Value |
Case 1 |
- Engine OFF time less than 0 - 900 seconds (depending on the amount of coolant temperature change)
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| Case 2 |
- Engine OFF time less than 7000 - 84000 seconds (depending on the amount of coolant temperature change)
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| Diagnostic Time |
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| MIL ON Condition |
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