DTC Information: DTC Detecting Condition

Item		Detecting Condition	Possible Cause
DTC Strategy	Case 1	Plausibility check	Poor connector connection Short or open circuit Faulty humidity sensor
DTC Strategy	Case 2	Rationality check, stuck
Enable Conditions	Case 1	Engine coolant temperature is less than 70°C (158°F) When the difference between HFM humidity temperature and Ambient air 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	Case 2	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	Case 1	If there is an error in maximum humidity plausibility
Threshold Value	Case 2	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