DTC Information: DTC Detecting Condition

Item		Detecting Condition	Possible Cause
DTC Strategy	Case1	Plausibility check	Poor connector connection Short or open circuit Faulty humidity sensor
DTC Strategy	Case2	Rationality check, stuck
Enable Conditions	Case1	Engine coolant temperature is less than 70°C (158°F) When the difference between HFM humidity temperature and Ambient air temperature temperature is above 6°C (42.8°F) No HFM chip heating No humidity sensor device error No SENT protocol error Ambient air temperature is between -10 to 50°C (14 to 122°F) Engine coolant temperature is between -10 to 60°C (14 to 140°F) at engine start The difference between the coolant temperature value and the ambient air temperature sensor value at engine start is less than 10°C (50°F) Accumulated crankshaft revolution is less than 100 times
Enable Conditions	Case2	No HFM chip heating No humidity sensor device error No SENT protocol error Ambient air temperature is between -10 to 50°C (14 to 122°F) Engine coolant temperature is between -10 to 60°C (14 to 140°F) at engine start The difference between the coolant temperature value and the ambient air temperature sensor value at engine start is less than 10°C (50°F) Accumulated crankshaft revolution is less than 100 times
Threshold Value	Case1	If there is an error in maximum humidity plausibility
Threshold Value	Case2	The difference between the maximum relative humidity and the minimum relative humidity is less than 0.1% The difference between the maximum HFM humidity tempature and the minimum HFM humidity tempature is more than 10°C (50°F)
Diagnostic Time		5s
MIL ON Condition		2 driving cycle