| Case 1 |
DTC Strategy |
- Engine speed is below the target while ISC torque is at the maximum during catalyst heating phase
|
- Intake air restriction
- Exhaust restriction
- Engine mechanical concern
- Damaged or sludged throttle body
- Vacuum leaks
- Damaged ECM
|
| Threshold Value |
- Difference of Desired engine speed and Engine speed greater than 100rpm
- Difference of Max. idle torque and Actual idle torque less than 10Nm
|
| Case 2 |
DTC Strategy |
- Engine speed is above the target while ISC torque is at the minimum during catalyst heating phase
|
| Threshold Value |
- Difference of Desired engine speed and Engine speed less than -200rpm
- Difference of Actual idle torque and Min. idle torque less than 20Nm
|
| Case 3 |
DTC Strategy |
- Fuel cut-off during stand-still, idle condition and catalyst heating phase
|
| Threshold Value |
- Fuel cut-off equal to or greater than 3times
|
| Enable Condition |
- Vehicle speed 0mph
- ECT(Engine Coolant Temperature) at start greater than -10.5°C(13.1°F)
- IAT(Intake Air Temperature) greater than -10.5°C(13.1°F)
- Accelerator pedal 0%
- BARO greater than 74.5kPa(10.8psi/0.745bar)
- Catalyst heating Active
|
| Diagnostic Time |
|
| MIL ON Condition |
|