DTC P0325: Knock Sensor Circuit Malfunction Reset the ECM/PCM (see page 11-312). Start the engine. Hold the engine at 3,000 rpm (min-1) with no load (in Park or neutral) until the radiator fan comes on, then let it idle. Hold the engine at 3,000-4,000 rpm (min-1) 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 at the ECM/PCM. Turn the ignition switch OFF. Disconnect the knock sensor 3P connector. Turn the ignition switch ON (II). Measure voltage between knock sensor 3P connector terminal No. 1 and body ground. KNOCK SENSOR 3P CONNECTOR Wire side of female terminals Is there about 5 V? YES - Go to step 12. NO - Go to step 8.

Measure voltage between ECM/PCM connector terminal A9 and body ground. ECM/PCM CONNECTOR A (31P) Wire side of female terminals Is there about 5 V? YES - Repair open in the wire between the ECM/PCM (A9) and knock sensor. NO - Go to step 9. Turn the ignition switch OFF. Disconnect ECM/PCM connector A (31P). Check for continuity between ECM/PCM connector terminal A9 and body ground. ECM/PCM CONNECTOR A (31P) Wire side of female terminals Is there about 5 V? YES - Repair short in the wire between ECM/PCM (A9) and knock sensor. NO - Substitute a known-good ECM/PCM and recheck (see page 11-313). If symptom/indication goes away, replace the original ECM/PCM.