| DTC Strategy |
Case1 |
- Check open circuit (target fuel air ratio is 1)
|
- Poor connector connection
- Open circuit of O2 sensor
- Faulty upstream O2 sensor
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| Case2 |
- Check open circuit (target fuel air ratio is not 1)
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| Case3 |
|
| Enable Conditions |
Case1 |
- Control the close loop of fuel oil system
- Injection fuel quantity is more than 10%
- Normal internal resistor signal
|
| Case2 |
- The target fuel air ratio is lower than -3% or higher than 3%
|
| Case3 |
- Nernst cell is higher than 0.47V or lower than 0.43V
|
| Threshold Value |
Case1, 2 |
- The sensor voltage is between 2.48V and 2.51V
|
| Case3 |
- The sensor voltage is lower than 1V or higher than 4V
|
| Diagnostic Time |
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| MIL ON Condition |
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