7mge knock sensor rewire not working code 52

Sonyps307 · 03-12-2013, 03:28 AM

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

cre · 03-12-2013, 05:56 AM

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.

03-12-2013, 03:28 AM	#1
Sonyps307 Lexus & 550's Join Date: May 2010 Location: Baltimore Posts: 526	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

03-12-2013, 05:56 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	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. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

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