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Home >> Toyota >> 1995 >> Previa LE, 2TZ-FE, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Non-Supercharged >> Diagnostic Testing >> Code 52 - Knock Sensor Circuit >> Circuit Description

Circuit Description

Knock sensor is located on engine block, underneath intake plenum. Sensor generates voltage when engine block vibrates due to knocking. Code is set when there is no knock sensor signal to ECM with engine speed of 1200-5200 RPM. Possible causes are:

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