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 > 10.7V Exhaust gas temperature (model) < 800°C (1472°F) Heater control enabled
Case1	Enable Conditions	B1S2 sensor voltage > 0.5V
Threshold Value	B1S1 sensor voltage : 0.06 ~ 0.4V
Diagnostic Time	25 sec
Case2	Enable Conditions	B1S2 sensor voltage < 0.1V
Threshold Value	B1S1 sensor voltage : 0.6 ~ 1.08V
Diagnostic Time	10 sec
Case3	Enable Conditions	Time after dew point end detected > 10s
Threshold Value	Counter of l Δusvk > 2V during 0.04 sec after heater on→off l > 5 times
MIL ON Condition	2 driving cycle
* Δusvk : Sum of the signal voltage change value (B1S1)

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