| DTC P0325 (23-1): | Malfunction in Knock Sensor Circuit |
| 1. | Reset the ECM/PCM. |
| 2. | 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. |
| 3. | Hold the engine at 3,000-4,000 rpm (min-1) for at least 60 seconds. Is DTC P0325 indicated? YES - Go to 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. |
| 4. | Turn the ignition switch OFF. |
| 5. | Disconnect the knock sensor 1P connector. |
| 6. | Disconnect the ECM/PCM connector A (31P). |
| 7. | Check for continuity between ECM/PCM connector terminal A9 and body ground.
Is there continuity? YES - Repair short in the wire between the ECM/ PCM (A9) and the knock sensor.n NO - Go to 8. |
| 8. | Connect the knock sensor 1P connector terminal No. 1 to body ground with a jumper wire.
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| 9. | Check for continuity between body ground and ECM/ PCM connector terminal A9.
Is there continuity? YES - Go to 10. NO - Repair open in the wire between the ECM/ PCM (A9) and the knock sensor.n |
| 10. | 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.n NO - Replace the original knock sensor.n |