CODE 52

  • Tiny
  • kaikiing
  • 1994 Toyota Corolla
  • 186,523 miles

Hi,

My Toyota Corolla AE110 year 1994 if not wrong with 16 valve EFI engine found error 52 after diagnostic jumper test. May I know what might be the problem is and how serious will be the problem cause. Can lead me some step for checking?

Thanks.

Friday, September 30th, 2011 AT 1:56 PM

18 Answers

  • Tiny
  • KHLow2008
  • Expert
  • 41,938 posts

DTC 52 - KNOCK SENSOR SIGNAL (1.8L)

DTC 52 is set when ECM detects an open or short in the knock sensor circuit with engine speed between 1200-6000 RPM. Check for open or short in knock sensor circuit, a loose or faulty knock sensor of faulty ECM.

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Friday, September 30th, 2011 AT 2:05 PM
  • Tiny
  • mhpautos
  • Expert
  • 29,809 posts

This code is for a knock sensor, before doing anything I would clear the code and test drive then re scan with an OBD11 scanner report back if there is a new code set.

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Friday, September 30th, 2011 AT 2:06 PM
  • Tiny
  • kaikiing
  • Member

Hi?
If not wrong my car cannot use any scan tools for scanning.I only found a diagnostic socket in front engine part. Can it be scan using scan tools?

Thanks.

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Friday, September 30th, 2011 AT 2:23 PM
  • Tiny
  • kaikiing
  • Member

Another thing.I accidentally start the engine when still jumper at the diagnostic port. Will that make any effect to my car ECM?

Thanks

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Friday, September 30th, 2011 AT 2:25 PM
  • Tiny
  • mhpautos
  • Expert
  • 29,809 posts

No it will not.

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Friday, September 30th, 2011 AT 2:28 PM
  • Tiny
  • kaikiing
  • Member

Can anyone show me how will exactly the knock sensor look like for toyota ae110?Many many thanks

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Friday, September 30th, 2011 AT 2:42 PM
  • Tiny
  • kaikiing
  • Member

Mphautos, May I know your answer of no it will not is answer for my which question?Sorry for asking that.

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Friday, September 30th, 2011 AT 2:45 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,938 posts

Refer to 3 rd diagram for sensor.

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Friday, September 30th, 2011 AT 2:56 PM
  • Tiny
  • mhpautos
  • Expert
  • 29,809 posts

Leaving the check connector in will not do any harm, do not leave it in there all the time, but for testing it is not a problem.

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Saturday, October 1st, 2011 AT 12:08 AM
  • Tiny
  • kaikiing
  • Member

Thanks a lot mhpautos.

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Saturday, October 1st, 2011 AT 1:39 AM

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