P0325

Diagnostic Chart (Part 1 Of 2):

Diagnostic Chart (Part 2 Of 2):

Schematics:

CIRCUIT DESCRIPTION
The control module contains a removable Knock Sensor (KS) module which receives the knock sensor input. The knock sensor signal input is filtered by this module before it is input to the controls module. Spark knock is continuously monitored during engine operation. If knock occurs for longer than a calibrated time, this Diagnostic Trouble Code (DTC) will set.

CONDITIONS FOR RUNNING THE DTC
^ DTC P0327 is not active.
^ The engine run time is more than 120 seconds.
^ The system voltage is between 10-17.1 volts.

CONDITIONS FOR SETTING THE DTC
The VCM detects engine knock for more than 5 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The control module illuminates the Malfunction Indicator Lamp (MIL) if a failure is detected during 2 consecutive key cycles.
^ The control module sets the DTC and records the operating conditions at the time the diagnostic failed. The failure information is stored in the scan tools Freeze Frame and Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC
^ The control module turns OFF the MIL after 3 consecutive drive trips when the test has Run and Passed.
^ A history DTC will clear if no fault conditions have been detected for 40 warm-up cycles. A warm-up cycle occurs when the coolant temperature has risen 22°C(40°F) from the startup coolant temperature and the engine coolant reaches a temperature that is more than 70°C (158°F) during the same ignition cycle.
^ A scan tool can clear the DTCs.

DIAGNOSTIC AIDS
^ Inspect for a damaged or improperly installed Knock Sensor (KS) module. Inspect for the following conditions:
- Any bent pins
- Any deformed terminals
- A KS module that is not completely seated
- A misrouted wiring harness
^ Inspect for an improperly torqued knock sensor.

Refer to Symptoms. Symptom Related Diagnostic Procedures

Review the Failure Records vehicle mileage since the diagnostic test last failed in order to determine how often the conditions occur that caused the DTC to set. This may assist in diagnosing the condition.

An intermittent may be caused by any of the following conditions:
^ A poor connection
^ Rubbed through wire insulation
^ A broken wire inside the insulation

Thoroughly inspect any circuitry that is suspected of causing the intermittent complaint. Refer to Testing for Intermittent and Poor Connections in Diagrams.

If a repair is necessary, refer to Wiring Repairs or Connector Repairs in Diagrams.

TEST DESCRIPTION
The numbers below refer to the Step numbers on the diagnostic table.
2. This Step ensures that the condition is present.
5. This Step checks for an improperly installed Knock sensor Module.