| (Case1) |
DTC Strategy |
- Signal Plausibility with Rich Mixture (During Catalyst Purge after Fuel Cut Off)
|
- Related fuse blown or missing
- Contact resistance in connectors
- HO2S contamination
|
| Enable Conditions |
- Coolant Temperature > 70°C(158°F)
- Sensor preheating and full heating phases finished
- Integrated MAF in last Fuel cut-Off > 18g
- Sensor signal at End of Last Fuel cut-off < 0.2V
- Integrated Air Mass Flow after Fuel Cut Off > 1000g
- Maximum Upstream O2 Sensor Voltage during Catalyst Purge > 0.7V
- Catalyst Temperature Model > 350°C(662°F)
|
| Threshold Value |
- Max Downstream O2 sensor Voltage during Catalyst purge after fuel cut-off < 0.55V
|
| Diagnostic Time |
- 2 Valid Fuel Cut Off by Catalyst Enrichment
|
| (Case2) MIL On Condition |
Enable Conditions |
- Sensor preheating and full heating phases finished
- Fuel cut-off phase
- Integrated MAF after starting fuel cut-off > 20g
|
| Threshold Value |
- Voltage with fuel cut off > 0.2V
|
| Diagnostic Time |
|