DTC Detection Condition

DTC DETECTION CONDITION REFERENCE

Item		Detecting Condition	Possible Cause
Case1)	DTC Strategy	Signal plausibility during fuel cut off	Related fuse blown or missing Contact resistance in connectors HO2S contamination
	Enable Conditions	(VLS_DOWN > 0.68V or < 0.21V) or Catalyst model temp > 500 °C Sensor preheating and full heating phases finished In fuel cut off phase In fuel cut off active 20g < Integrated mass air flow < 200g No relevant failure 10V < Battery voltage < 16V
	Threshold Value	Voltage with fuel cut off > 0.1V
	Diagnostic Time	2 sec.
Case2)	DTC Strategy	Signal plausibility during full load
	Enable Conditions	(VLS_DOWN > 0.68V or < 0.21V) or Catalyst model temp > 500 °C Sensor preheating and full heating phases finished 70g < Integrated mass air flow since begin full load < 300g No relevant failure 11V < Battery voltage < 16V
	Threshold Value	Voltage with full load < 0.70V
	Diagnostic Time	2 sec.
Case3)	DTC Strategy	Signal plausibility after fuel cut off
	Enable Conditions	Integrated mass air flow in lasr fuel cut off > 8g Integrated mass air flow in part load > 250g Coolant temperature > 74°C(165°F) Downstream O2 sensor signal at end of last fuel cut off < 0.25V Sensor preheating and full heating phases finished In Closed loop mode Minimum upstream lambda during Catalyst Purge phase < 0.98(to ensure Rich Mixture during Catalyst Purge Phase) Catalyst temperature > 348°C(658°F) No relevant failure 11V < Battery voltage < 16V
	Threshold Value	MAX voltage with after full cut off < 0.55V
	Diagnostic Time	3 valid fuel cut-off followed by catalyst enrichment phases
Mil On Condition		2 Driving Cycles