| Item |
Detecting Condition |
Possible Cause |
| DTC Strategy |
Case 1 |
Fuel Rail/System pressure low during catalyst heating |
- Poor Connector Connection
- Clogged Fuel Filtter
- Restricted Fuel Supply Line
- Fuel Leakage
- Faulty Fuel Pressure Regulator
- Faulty Fuel Rail Pressure Sensor
- Faulty ECM/PCM
|
| Case 2 |
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 43°C (109°F)
- Vehicle speed is lower than 60km/h (37.2mph)
- 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 512RPM
|
| Threshold Value |
Case 1 |
- Deviation of fuel pressure setpoint higher than 1.5MPa (15bar/217.5psi)
|
| Case 2 |
- Deviation of fuel pressure setpoint lower than -1.5MPa (-15bar/-217.5psi)
|
| Diagnostic Time |
8s |
| MIL On Condition |
2 driving cycles |