General Information: DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item		Detecting Condition	Possible Cause
DTC Strategy		Signal check, wiring interruption	Poor connection Open or short in signal circuit S1
Case 1	Enable Conditions	Fuel cut-off time > 3 sec Downstream O2S voltage > 0.2V B+ > 10.7V Upstream O2S Heater control On
	Threshold Value	Sensor voltage > 0.2V
	Diagnostic Time	0.1 sec
Case 2	Enable Conditions	Sensor voltage: 0.4~0.6V B+ > 10.7V Upstream O2S Heater control On
Case 2	Threshold Value	Average of loaded voltage. > 2.8V
Case 3	Enable Conditions	Exhaust gas temperature (model) > 600°C B+ > 10.7V Upstream O2S Heater control On
Case 3	Threshold Value	Internal resistance > 20 kΩ
Case 4	Enable Conditions	B+ > 10.7V Upstream O2S Heater control On
	Threshold Value	0.4V < Upstream O2S voltage < 0.6V
	Diagnostic Time	5 sec
MIL ON Condition		2 driving cycle

* S1: upstream oxygen sensor/S2: downstream oxygen sensor