DTC P0325: Knock Sensor Circuit

CIRCUIT OPERATION
• The knock sensor sends a signal voltage to the ECM (terminal No. 78) <M/T> or PCM (terminal No. 90) <A/T>.
TECHNICAL DESCRIPTION
• The knock sensor converts the vibration of the cylinder block into a voltage and outputs it. If there is a malfunction of the knock sensor, the voltage output will not change.
• The ECM <M/T> or PCM <A/T> checks whether the voltage output changes.
DTC SET CONDITIONS

Check Conditions
Two seconds or more have passed since the starting sequence was completed.
Engine speed is higher than 2,500 r/min.

Judgment Criteria
• Knock sensor output voltage (knock sensor peak voltage in each 1/2 turn of the crankshaft) has not changed more than 0.06 volt in the last consecutive 200 periods.
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are: )
• Knock sensor failed.
• Open or shorted knock sensor circuit, or connector damage.
• ECM failed. <M/T>
• PCM failed. <A/T>