7mge knock sensor rewire not working code 52
 

Ok so I have a rebuilt 7mge and I rewired the ks 3 times and tried different knock sensors. Today I rewired it again with a new wire and ks connector also a new ks from Toyota. I followed this ks rewire guide. i also swapped ecu still have code 52.


http://www.turboninjas.com/supra/knocksensor_rewire.pdf

Are these new or used sensors? They're VERY delicate devices and it's not unheard of to end up swapping out a handful of used sensors before you find a good one. I don't know if the thread is the same but in the MR-2 and Celica communities they've taken to using an adapter to swap in inexpensive GM knock sensors with the S series engines (5S and 3S, specifically). You might look into it and see if it'll work on the 7M.

Given that the knock sensor is a piezo electric device an abnormal knock or rattle may cause a signal to be sent to the ECU which is causing the ECU to think there's an abnormality in the circuit.

That's all I've got as far as suggestions.