Troubleshooting

DTC P0325 KNOCK SENSOR 1 CIRCUIT MALFUNCTION (BANK 1)

CIRCUIT DESCRIPTION

DTC Detecting Condition:

The knock sensor is fitted to the cylinder block to detect the engine knocking. This sensor contains a piezoelectric element which generates a voltage when it becomes deformed. This occurs when the cylinder block vibrates due to knocking If the engine knocking occurs, the ignition timing is delayed to suppress it.

HINT: If the ECM detects above diagnosis conditions, it operates the fail safe function in which the corrective retard angle value is set to the maximum value.

Wiring Diagram:

Step 1 - 3:

Step 4:

INSPECTION PROCEDURE

HINT: Read freed frame data using hand-held tester OBD II scan tool. Because freeze frame records the engine conditions when the malfunction is detected, when troubleshooting it is useful for determining whether the vehicle was running or stopped, the engine warmed up or not, the air-fuel ratio lean or rich, etc. at the time of the malfunction.