P0325
DTC P0325: Knock Sensor Circuit Malfunction1. Reset the ECM.
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 10 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.
4. Turn the ignition switch OFF.
5. Disconnect the knock sensor 1P connector.
6. 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 7.
7. Connect knock sensor connector terminal No.1 to body ground with a jumper wire.
8. Check for continuity between ECM connector terminal C22 and body ground.
Is there continuity?
YES - Go to step 9.
NO - Repair open in the wire between the ECM (C22) and the knock sensor.
9. Substitute a known-good knock sensor and recheck.
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.