2001 Toyota Avalon XL V6-3.0L (1MZ-FE) Save Article Select Print Option Complete Article Text Only Image(s) Only CIRCUIT DESCRIPTIONEach of knock sensor is fitted to the right bank and left bank of the cylinder block to detect engine
knocking. This sensor contains a piezoelectric element which generates a voltage when it becomes deformed, which occurs when the cylinder block vibrates due to knocking. If engine knocking occurs, ignition timing is retarded to suppress it.
If the ECM detects the above diagnosis conditions, it operates the fail-safe function in which the corrective retard angle value is set to the maximum value.INSPECTION PROCEDUREHINT:
- DTC P0325 is for the right bank knock sensor circuit.
- DTC P0330 is for the left bank knock sensor circuit.
- Read freeze frame data using TOYOTA hand-held tester or OBD II scan tool. Because freeze frame records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.
you problem is going to be in the wiring or a bad ecm , if you look at diagram , it shows it powers up by the ecm and grounded to block , so if you get your test light and check you should have 5v reference from ecm, if you dont then it is in the wire or the ecm , unplug the ecm , run a continuity test on the wire going back to ecm from knock sensor ,if it passed , then replace the ecm .if it did not pass the continuity test
fix the wire .
Hope I was helpfull to you ,Let me know if you need anything else on it
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