DTC 52 - Knock Sensor Signal

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

Fig 1: DTC 52 - Schematic

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: DTC 52 - Detection Driving Pattern

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: DTC 52 - Inspection Using Oscilloscope

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: DTC 52 - Diagnostic Flowchart (1 Of 2)

Fig 5: DTC 52 - Diagnostic Flowchart (2 Of 2)