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Home >> Toyota >> 1995 >> Supra 2JZ-GE, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Turbo >> Diagnostic Testing >> Code 52 - Knock Sensor (Front) Circuit >> Circuit Description
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Circuit Description

The front knock sensor is located on left side of cylinder block under intake manifold. Sensor generates voltage when engine block vibrates due to knocking. Code is set when there is an open or short in knock sensor circuit to ECM with engine speed between 2050-5950 RPM. Possible causes are:

NOTE: Conduct following test drive to simulate trouble code detecting condition after code is recorded, and to confirm malfunction is corrected after repair.
CAUTION: If test conditions are not strictly followed, detection of malfunction will not be possible.
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