| DTC Strategy |
Case1) |
- Signal plausibility during fuel cut off
|
- Related fuse blown or missing
- Contact resistance in connectors
- HO2S contamination
|
| Case2) |
- Signal plausibility after fuel cut off
|
| Enable Conditions |
Case1) |
- O2 sensor operative readiness
- OSensor preheating and full heating phases finished
- In fuel cut off phase
- Integrated mass air flow > 20g
- Fuel Cut Off phase
- No relevant failure
- 10V < Battery voltage < 16V
|
| Case2) |
- Coolant temperature > 74°C (165°F)
- Downstream O2 Sensor operative readiness detected
- Downstream O2 sensor preheating phase finished
- Integrated air mass flow in last fuel cut off > 10 g
- Downstream O2 sensor signal at end of last fuel cut off < 0.25 V
- Integrated air mass flow in Part Load > 250 g
- Minimum upstream O2 sensor signal during Catalyst Purge phase > 0.7V (to ensure Rich mixture during Catalyst Purge Phase)
- Catalyst temperature > 348°C (658°F)
- No relevant failure
- 11V < Battery voltage < 16V
|
| Threshold Value |
Case1) |
- Voltage with fuel cut off > 0.1V
|
| Case2) |
- Max. voltage with catalyst purge after fuel cutoff < 0.55V
|
| Time |
Case1) |
|
| Case2) |
- 3 valid fuel cutoff followed by catalyst enrichment phases
|
| Mil On Condition |
|