4.4.2 Monitoring Structure
Fuel System Monitoring
| Component/System | Fault Codes | Monitoring Strategy Description | Malfunction Criteria | Threshold value | Secondary Parameter | Enable Conditions | Time Required | MIL Illumination |
|---|---|---|---|---|---|---|---|---|
| Fuel System Monitoring | P0171/2 P0174/5 |
Short term monitor | Enrichment factor | >28% OR < -28% | Lambda control | Active | 60 s | two driving cycles |
| Long term monitor | Fuelling correction Rich Lean |
> 17% for a cumulative time "GREATER THAN EQUAL TO" 85 s OR < -20% for a cumulative time -20 s |
Lambda control Ambient temp. Can. loading check Charcoal can load factor Load dependent purge correction factor ECT Fuel in Oil Engine state |
Active "GREATER THAN EQUAL TO" -5°C Not in progress > 0.852 > -15.0% > 60 °C Not detected Not in ORFCO or > 1.5 s since ORFCO |
20 to 85 s /continuous | |||
| P2096/7 P2098/9 |
Lambda trim control | Lambda trim correction OR | > 0.300 s < - 0.300s |
EVAP canister load factor EVAP Canister Purge functional check | Not critical Not in progress | 11 s /continuous |
If the above table does not include details of the following enabling conditions: - IAT, ECT, vehicle speed range, and time after engine start-up then the state of these parameters has no influence upon the execution of the monitor.