LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chrysler >> 2002 >> Intrepid Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0325: Knock Sensor #1 Circuit >> Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P0325: Knock Sensor #1 Circuit: Testing

  1. Turn ignition on, engine not running. With the DRBIII®, read DTCs and record the related Freeze Frame data. Is the Good Trip displayed and equal to zero? If yes, go to next step. If no, go to step  8.
  2. Turn the ignition off. Disconnect the Knock Sensor harness connector. Measure the voltage of the Knock Sensor Signal circuit in the Knock Sensor harness connector. Is the voltage above 2.0 volts? If yes, repair the short to voltage in the Knock Sensor Signal circuit. If no, go to next step.
  3. Ensure the ignition is off. Disconnect the PCM harness connectors. Measure the resistance between ground and the Knock Sensor Signal circuit in the Knock Sensor harness connector. Is the resistance below 100 ohms? If yes, repair the short to ground in the Knock Sensor Signal circuit. If no, go to next step.
    4. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal-to-pin connection. Use Miller Special Tool (8815) when performing diagnosis at PCM harness connectors.
  4. Measure the resistance of the Knock Sensor Signal circuit from the Knock Sensor harness connector to the appropriate terminal of the Miller Special Tool. Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the open in the Knock Sensor Signal circuit.
  5. Measure the resistance between the Knock Sensor Signal circuit and the Knock Sensor Return circuit in the Knock Sensor harness connector. Is the resistance below 100 ohms? If yes, repair the Knock Sensor Signal circuit for a short to the Knock Sensor Return circuit. If no, go to next step.
  6. Measure the resistance of the Knock Sensor Return circuit from the Knock Sensor harness connector to the appropriate terminal of the Miller Special Tool. Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the open in the Knock Sensor Return circuit.
  7. Replace knock sensor. Turn ignition on, engine not running. With the DRBIII®, erase DTC. Attempt to operate vehicle using information noted in Freeze Frame data. With the DRBIII®, read DTCs. Does the DRBIII®, display the DTC that was previously erased? If yes, replace PCM. Program the new PCM. See PROGRAMMING . If no, test is complete.
    8. WARNING: When the engine is operating, do not stand in a direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing.
  8. The conditions that set the DTC are not present at this time. The following may help in identifying the intermittent condition. With the engine running at normal operating temperature, monitor the DRBIII® parameters related to the DTC while wiggling the wiring harness. Look for parameter values to change and/or a DTC to set. Review the DRBIII® Freeze Frame information. If possible, try to duplicate the conditions under which the DTC was set. Refer to any Technical Service Bulletins (TSB) that may apply. Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals. Were any of the above conditions present? If yes, repair as necessary. If no, test is complete.
scientia non olet · About LEMON Manuals