| DTC Strategy |
Case 1 |
|
- Poor connector connection
- Short circuit of power cable
- Faulty upstream O2 sensor
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| Case 2 |
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| Case 3 |
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| Case 4 |
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| Enable Conditions |
Case 1 |
- It is not fuel cutting
- Battery voltage (10.7V to 16V)
- Closed loop fuel control
- Engine running (20s)
|
| Case 2 to 4 |
- Closed loop fuel control
- Amount of exhaust gas (accumulation) is high than 1000g
|
| Threshold Value |
Case 1 |
- Voltage of the signal cable of upstream oxygen sensor is between 1.58V and 1.84V
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| Case 2 |
- Voltage of the signal cable of upstream oxygen sensor is lower than 0.55V
- Voltage of the signal cable of downstream oxygen sensor is higher than 0.75V
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| Case 3 |
- Voltage of the signal cable of upstream oxygen sensor is between 0.7V to 1.80V
- Voltage of the signal cable of downstream oxygen sensor is lower than 0.25V
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| Case 4 |
- Voltage of the signal cable of upstream oxygen sensor is between 0.45V to 0.65V
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| Diagnostic Time |
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| MIL ON Condition |
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