P0325-Knock Sensor 1 Circuit Low: Notes

Fig 1: Knock Sensors Circuit Schematic

Courtesy of CHRYSLER LLC

When Monitored : With the Engine at operating temperature, engine speed greater than 2000 RPM, load greater than 40%, and Anti-Knock control not active.
Set Condition : Lower limit: Knock Sensor voltage is less than 0.10 volts. Upper limit: Knock Sensor voltage is greater than 4.98 volts.

Possible Causes

KNOCK SENSOR SIGNAL CIRCUIT OPEN

KNOCK SENSOR SIGNAL CIRCUIT SHORT TO GROUND

KNOCK SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE

SENSOR GROUND CIRCUIT OPEN

SENSOR GROUND CIRCUIT SHORT TO GROUND

SENSOR GROUND CIRCUIT SHORT TO VOLTAGE

KNOCK SENSOR SIGNAL CIRCUIT SHORT TO SENSOR GROUND CIRCUIT

KNOCK SENSOR

POWERTRAIN CONTROL MODULE

For a complete Powertrain Control Module Circuit Diagram, refer to SCHEMATICS AND DIAGRAMS .