DTC P0335: Crankshaft Position Sensor "A" Circuit: Description

The crankshaft position sensor system consists of a No. 1 crankshaft position sensor plate and a pickup coil.

The No. 1 crankshaft position sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of wound copper wire, an iron core and magnet. The No. 1 crankshaft position sensor plate rotates and, as each tooth passes by the pickup coil, a pulse signal is created. The pickup coil generates 34 signals per crankshaft revolution. Based on these signals, the ECM calculates the crankshaft position and engine speed. Using these calculations, the fuel injection and ignition timing are controlled.

DTC No.	DTC Detection Condition	Trouble Area
P0335	Either of the following conditions is met (1 trip detection logic): No crankshaft position sensor signal to ECM. Missing crankshaft position sensor signal despite camshaft position sensor signal inputs normal after engine cranked.	Open or short in crankshaft position sensor circuit Crankshaft position sensor No. 1 crankshaft position sensor plate ECM

Reference: Inspection using an oscilloscope.

Fig 1: Identifying Waveform

HINT:

The correct waveform is as shown.
Grounding failure of the shielded wire may cause noise in the waveforms.

ECM Terminal Name	Between NE+ and NE-
Tester Range	5 V/DIV., 20 ms./DIV.
Condition	Idling with warm engine