P0325
DTC P0325: Knock Sensor Circuit Malfunction1. Reset the ECM with the HDS.
2. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
3. Hold the engine speed at 3,000 - 4,000 rpm for 10 seconds.
4. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0325 indicated?
YES - Go to step 5.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the knock sensor and the ECM.
5. Turn the ignition switch OFF.
6. Disconnect the knock sensor 1 P connector.
7. Disconnect ECM connector C (31P), then check for continuity between ECM connector terminal C22 and body ground.
Is there continuity?
YES - Repair short in the wire between the ECM (C22) and the knock sensor.
NO - Go to step 8.
8. Connect the knock sensor 1 P connector terminal to body ground with a jumper wire.
9. Check for continuity between ECM connector terminal C22 and body ground.
Is there continuity?
YES - Go to step 10.
NO - Repair open in the wire between the ECM (C22) and the knock sensor.
10. Substitute a known-good knock sensor.
11. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0325 indicated?
YES - Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM.
NO - Replace the original knock sensor.