DTC 23

DTC P0325: Malfunction in Knock Sensor Circuit
1. Do the ECM/PCM Reset Procedure.
2. Start the engine. Hold the engine at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on, then let it idle.
3. Hold the engine at 3,000 - 4,000 rpm for at least 60 seconds.
Is DTC P0325 indicated?
YES-Go to step 4.
NO-Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the knock sensor and the ECM/PCM.
4. Turn the ignition switch OFF.
5. Disconnect the knock sensor connector.




6. Check for continuity between ECM/PCM connector terminals C3 and body ground.
Is there continuity?
YES-Repair short in the wire between ECM/PCM (C3) and the knock sensor.
NO-Go to step 7.




7. Check for continuity between ECM/PCM connector terminal C3 and knock sensor connector terminal No.1.
Is there continuity?
YES-Go to step 8.
NO-Repair open in the wire between ECM/PCM (C3) and the knock sensor.
8. Substitute a known-good knock sensor and recheck.
Is DTC P0325 indicated?
YES-Substitute a known-good ECM/PCM and recheck. If symptom/indication goes away, replace the original ECM/PCM.
Diagnostic Strategies

NO-Replace the original knock sensor.