| Case 1 |
DTC Strategy |
- Sensor signal cycle check
|
- Poor Connection
- Faulty MAFS circuit
- Faulty MAFS
|
| Enable Condition |
- Engine running condition
- Battery voltage ranges from 10V to 16V
- Time after engine start greater than 0.5s
- Time after Ignition on greater than 0.8s
|
| Threshold Value |
- Sensor signal cycle is short:
Sensor signal cycle less than 85μs, Calculated air volume greater than 655kg/h
- Sensor signal cycle is long
Sensor signal cycle greater than 555μs, Calculated air volume less than 7kg/h
|
| Detecting Time |
|
| Case 2 |
DTC Strategy |
- Sensor diagnostic error signal check
|
| Enable Condition |
- Battery voltage ranges from 11V to 16V
- When engine start, engine speed ranges from 928 to 1312 RPM (Depends on coolant temperature)
- Pressure rate (Intake manifold pressure/Barometric pressure) is lower than 0.8
|
| Threshold Value |
- Air intake area correction value is lower than -90% to -40%, and higher than 40% to 90%. (Depens on barometric pressure and throttle position)
|
| Detecting Time |
|
| Case 3 |
DTC Strategy |
- Sensor diagnostic error signal check
|
| Enable Condition |
- Battery voltage ranges from 11V to 16V
- When engine start, engine speed ranges from 928 to 1312 RPM (Depends on coolant temperature)
- Pressure rate (Intake manifold pressure/barometric pressure) is higher than 0.8
|
| Threshold Value |
- Air intake area correction value is lower than -30% to -20%, and higher than 20% to 30%. (Depends on barometric pressure)
|
| Detecting Time |
|
| MIL |
|