| DTC Strategy |
Case1 |
- Fuel Rail/System pressure low during catalyst heating
|
- Poor Connector Connection
- Clogged Fuel Filter
- Restricted Fuel Supply Line
- Fuel Leakage
- Faulty Fuel Pressure Regulator
- Faulty Fuel Rail Pressure Sensor
- Faulty ECM/PCM
|
| Case2 |
- Fuel Rail/System pressure high during catalyst heating
|
| Enable Condition |
- Catalyst heating active
- Engine coolant temperature (ECT) at engine start at between -10°C (14°F) to 50°C (122°F)
- Vehicle speed is lower than 9.4 MPH
- Accelerator pedal value is lower than 0.01% (pedal sensor 1 voltage 0, 859 V, not pushed at all)
- Volume fuel flow is lower than threshold value
- Mass fuel flow is higher than 4mg/stroke
- Engine speed is higher than 512 RPM
|
| Threshold Value |
Case1 |
- Deviation of fuel pressure set-point higher than 1.5 MPa (15 bar/217.5 psi)
|
| Case2 |
- Deviation of fuel pressure set-point lower than -1.5 MPa (-15 bar/-217.5 psi)
|
| Diagnosis Time |
|
| MIL On Condition |
|