The PCM/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 nose value exceeds the minimum or maximum thresholds.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Plausibility check | 1. Open/short in signal or ground circuit 2. Poor connection or damaged harness 3. Faulty knock sensor |
Enable Conditions |
•
Knock detection function active
•
Engine rpm >2700 rpm
•
Air mass >0.5g/rev(250mg/tdc.)
•
No relevant failure | |
Threshold Value |
•
Difference between the processed knock sensor signal and its mean does not exceed a threshold(0.08V) & the integral of the processed knock sensor signal does not reach the threshold(3V) for cylinders 2 and 3
•
If the mean processed knock sensor signal of any one cylinder leaves the valid range(0.1V~4.5V). | |
Diagnostic Time |
•
100 rev. | |
Mil On Condition |
•
Two trips |
