| DTC Strategy |
- Erratic Air/Fuel correction value
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- Fuel leakage or stuck in injector
- Air leakage in cylinder
- Ignition system error in cylinder
- Abnormal compression pressure in cylinder
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| Enable Conditions |
- Engine coolant temperature is higher than 68.3°C (146.84°F)
- Catalyst temperature model is lower than 900°C (1652°F)
- Engine speed is between 1152 RPM and 2800 RPM
- Fuel mass set-point is between 0.035 g/rev and 0.113 g/rev.
- Vehicle speed is greater than 15.6 mph
- Fuel trim is active
- Lambda set-point is between 1.03 and 0.97
- Stable driving condition:
- Actual RPM is 60 RPM lower than filtered RPM
- Actual mass air is 0.24g/rev lower than filtered mass air
- Actual lambda is 5.0% lower than filtered lambda value
- Actual ignition angle efficiency is 0.1 lower than filtered ignition angle
- Time after engine start is more than 10 seconds
- Catalyst heating is not active
- Fuel cut-off is not active
- Catalyst purge after fuel cut-off is not active
- No misfire is detected
|
| Threshold value |
- Cylinder #1 individual A/F deviation is greater than threshold
- Previous long term fuel trim deviation is greater than 17% or current cylinder deviation is lower than -19%
- Long term fuel trim deviation is greater than 14% or lower than -16%
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| Diagnosis Time |
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| MIL On Condition |
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