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General Information: DTC Detecting Condition
DTC DETECTING CONDITION AND POSSIBLE CAUSES
| Item |
Detecting Condition |
Possible Cause |
| DTC Strategy |
- Check catalyst oxygen storage capacity by evaluation downstream O2 sensor fluctuations
|
- Exhaust gas leaks
- Faulty rear HO2S
- Faulty three way catalyst converter
|
| Enable Conditions |
- Coolant temperature > 74°C (165°F)
- Vehicle speed > 5 km/h (3 MPH)
- Ambient pressure > 700 hPa
- 1200 rpm < Engine speed < 3500 rpm
- 110 < Mass air flow (mg/STK) < 350
- Stable driving condition
- Canister load < 0.5
- Catalyst temp. model: 300°C (572°F) to 730°C (1346°F)
- Lambda control/Forced stimulation active
- (VLS_DOWN > 0.68V or < 0.21V) or Catalyst model temp > 500°C
- Engine operating state Part load
- No relevant failure
- 11V < Battery voltage < 16V
|
| Threshold Value |
- Integral of VLS_DOWN - VLS_DOWN filtered > thd.
|
| Diagnostic Time |
- 20 forced stimulation cycles
|
| MIL On Condition |
|