| DTC Strategy |
Case 1 |
- Knock control Signal evaluation
|
- Poor connector connection
- Open or short in Signal circuit
- Knock sensor
|
| Case 2 |
|
| Case 3 |
- Rationality check, low side
|
| Enable Conditions |
Case 1, 2 |
|
| Case 3 |
- ECT is higher than 70°C (158°F)
- Engine speed is higher than 2440RPM
- Engine load is greater than 40 to 60%
|
| Threshold Value |
Case 1 |
- Signal evaluation of current combustion implausible is greater than 24
- Measuring window of knock evaluation implausible more than 2
|
| Case 2 |
- Short circuit to ground, line A is less than -0.7V
- Short circuit to ground, line B is less than -0.7V
- Short circuit to battery, line A is greater than 1V
- Short circuit to battery, line B is greater than 1V
|
| Case 3 |
- Normalized reference level is less than 0.24 to 0.40V
|
| Diagnostic Time |
Case 1, 2 |
|
| Case 3 |
|
| MIL ON Condition |
|