General Information: DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item		Detecting Condition	Possible Cause
DTC Strategy		Rationality check	Poor connection Open or short power/ground in signal circuit B1S1 ECM
General Enable Conditions		Dew point end detected Required lambda = 1 Battery voltage > 10.7 V Exhaust gas temperature (model) < 800 °C Heater control enabled
Case 1	Enable Conditions	B1S2 sensor voltage > 0.5 V
	Threshold Value	B1S1 sensor voltage : 0.06 ~ 0.4 V
	Diagnostic Time	sec
Case 2	Enable Conditions	B1S2 sensor voltage < 0.1 V
	Threshold Value	B1S1 sensor voltage : 0.6 ~ 1.08 V
	Diagnostic Time	sec
Case3	Enable Conditions	Time after dew point end detected > 10 s
	Threshold Value	Counter of \| Δusvk > 2 V during 0.04 sec after heater on→ off \| > 5 times
	2 Diagnostic Time	2 driving cycle

* Δusvk : Sum of the signal voltage change value (B1S1)

* B1S1 : upstream oxygen sensor/B1S2 : downstream oxygen sensor