| Main Action |
Case1 |
- Pumping line circuit open at target lambda=1
|
- Poor contact of connector
- Open in signal circuit of O2 Sensor (Up)
- O2 Sensor (Up)
|
| Case2 |
- Pumping line circuit open at target lambda not equal to
1
|
| Case3 |
- Pumping current circuit open at rich or lean side
|
| Prerequisite Condition |
Case1 |
- Fuel system status is closed loop
- Differential of fuel factor is higher than 10%
- Internal resistance Signal is Valid
|
| Case2 |
- Target lambda is lower than 0.97% or higher than 1.03%
|
| Case3 |
- Nernst voltage is higher than 0.47V or lower than 0.43V
|
| Threshold Value |
Case1, 2 |
- Sensor voltage is between 2.48V and 2.5V
|
| Case3 |
- Nernst voltage is lower than 1V or higher than 4V
|
| Diagnostic Time |
Case1 |
|
| Case2 |
|
| Case3 |
|
| MIL |
|