| DTC Strategy |
- Signal voltage monitoring
|
- Poor connector connection
- Short/open in upstream O2 sensor signal circuit
- Defected upstream O2 sensor
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| General Enable Conditions |
- Fuel feedback control active
- Battery voltage is higher than 10.7V
- Upstream O2 sensor heater control "ON"
|
| Enable Condition |
Case 1 |
- Downstream O2 sensor voltage is higher than 0.55V
|
| Case 2 |
- Downstream O2 sensor voltage is lower than 0.15V
- Dew point end check
|
| Case 3 |
- 10 sec. after dew point end detected
|
| Threshold Value |
Case 1 |
- Upstream O2 sensor voltage is at between 0.06V and 0.4V
|
| Case 2 |
- Upstream O2 sensor voltage is at between 0.6V and 1.08V
|
| Case 3 |
- 0.04 sec. for absolute value of Δusvk is higher than 2V during 5 times of heater on and off condition
|
| Diagnostic Time |
Case 1 |
|
| Case 2 |
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| MIL ON Condition |
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