DTC P0335, P0339; Crankshaft Position Sensor "A" Circuit [12/2012 - ]: Description

The crankshaft position sensor system consists of a crank angle 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 crank angle 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.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P0335	Crankshaft Position Sensor "A" Circuit	One of the following conditions is met (1 trip detection logic): No crankshaft position sensor signal to ECM while cranking. No crankshaft position sensor signal to ECM while engine running. 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 Crankshaft (crank angle sensor plate) ECM	Comes on	DTC stored	DTC for Mexico Models - Applies
P0339	Crankshaft Position Sensor "A" Circuit Intermittent	All of the following conditions are met (1 trip detection logic): (a) The engine speed is 1000 rpm or higher. (b) No crankshaft position sensor signal for 0.05 seconds or more. (c) 3 seconds or more have elapsed since the starter signal switched from on to off.	Open or short in crankshaft position sensor circuit Crankshaft position sensor Crankshaft (crank angle sensor plate) ECM	-	DTC stored	DTC for Mexico Models - Applies

Reference: Inspection using an oscilloscope.

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HINT:

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