Circuit Description

The Crankshaft Position (CKP) sensor system consists of a CKP sensor plate and a pickup coil. The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of an iron core and a magnet. The sensor plate rotates and, as each tooth passes through the pickup coil, a pulse signal is created. The pickup coil generates 34 signals per engine revolution. Based on these signals, the ECM calculates the crankshaft position and engine RPM. Using these calculations, the fuel injection time and ignition timing are controlled.

Fig 1: DTC P0335 And P0339 - Circuit Description Diagram

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Fig 2: Identifying Correct Waveform

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Reference: Inspection using an oscilloscope.

HINT:

• The correct waveform is shown on the left.
• G2 stands for the Camshaft Position (CMP) sensor signal, and NE+ stands for the CKP sensor signal.