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

The crankshaft position sensor system consists of a crankshaft position sensor plate and a pickup coil.

The 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 sensor plate rotates and, as each tooth passes by 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 speed. Using these calculations, the fuel injection time and ignition timing are controlled.

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

DTC No.

DTC Detection Condition

Trouble Area

P0335

When either of following conditions are met:
(1 trip detection logic)

Missing crankshaft position sensor signal despite camshaft position sensor signal inputs normal after engine cranked

No crankshaft position sensor signal to ECM

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 2

HINT:

The correct waveform is as shown.
A failure of the ground for the shielding of the wiring may result in noisy waveforms.

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