P0325
DTC P0325: Knock Sensor Circuit Malfunction1. Reset the ECM/PCM.
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 terminals at the knock sensor and at the ECM/PCM.
4. Turn the ignition switch OFF.
5. Disconnect the knock sensor 3P connector.
6. Turn the ignition switch ON (II).
7. Measure voltage between knock sensor 3P connector terminal No. 1 and body ground.
Is there about 5 V?
YES - Go to step 12.
NO - Go to step 8.
8. Measure voltage between ECM/PCM connector terminal A9 and body ground.
Is there about 5 V?
YES - Repair open in the wire between the ECM/PCM (A9) and knock sensor.
NO - Go to step 9.
9. Turn the ignition switch OFF.
10. Disconnect ECM/PCM connector A (31P) from the ECM/PCM.
11. Check for continuity between ECM/PCM connector terminal A9 and body ground.
Is there continuity?
YES - Repair short in the wire between ECM/PCM (A9) and knock sensor.
NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.
12. Substitute a known-good knock sensor and recheck.
Is DTC P0325 indicated?
YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.
NO - Replace the original knock sensor.