The ECM monitors the range of the analog input signal from knock sensor to check sensor failure that is short circuit or open circuit. If the difference between knock signal and noise level is smaller than the threshold during defined time period, the DTC P0326 is set. P0326 will also set if the noise value exceeds the minimum or maximum thresholds.
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
Signal monitoring | 1. Poor connector connection 2. Open or short in knock sensor signal circuit 3. Faulty knock sensor #1 | |
Enable Condition | Case 1 |
•
Engine speed is higher than 2400rpm
•
Knock control condition - active | |
Case 2 |
•
Knock control condition - inactive | ||
Threshold Value | Case 1 |
•
Normalized reference level of knock signal is less than lower limit | |
Case 2 |
•
Short to ground or power in circuit | ||
Diagnostic Time |
•
Continuous | ||
MIL ON Condition |
•
- | ||
