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General Information: DTC Detecting Condition

DTC DETECTING CONDITION REFERENCE CHART

Item Detecting Condition Possible Cause
Case 1 DTC Strategy
  • Open circuit
  1. Poor connection
  2. Open or short power/ground in signal circuit
  3. B1S1
Enable Conditions
  • Dew point end detected
  • Target lambda = 1
  • Battery voltage > 10.7V
  • Exhaust gas temperature (model): 600°C ~ 900°C
  • Upstream O2S Heater control On
Threshold Value
  • Internal resistance > 20kΩ
Case 2 DTC Strategy
  • Feedback check
Enable Conditions
  • Dew point end detected
  • Target lambda = 1
  • Battery voltage > 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
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