DTC P0335: Crankshaft Position Sensor "A" Circuit; DTC P0337: Crankshaft Position Sensor "A" Circuit Low Input; DTC P0338: Crankshaft Position Sensor "A" Circuit High Input [10/2015 - 08/2018]: Description

The crankshaft position sensor consists of a crankshaft angle sensor plate (flywheel sub-assembly) and Magnetic Resistance Element (MRE) type sensor. The crankshaft angle sensor plate has 34 teeth at 10° intervals (2 teeth are missing for detecting top dead center), and is installed to the rear end of the crankshaft.

The crankshaft position sensor output 34 rotation signals per engine speed. The ECM assembly uses the VVT sensor signal to distinguish between the cylinders, and uses the NE signal to detect the crankshaft position and engine speed.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P0335	Crankshaft Position Sensor "A" Circuit	Either of the following conditions is met (1 trip detection logic): No crankshaft position sensor signal to ECM assembly while engine running. The engine stalls and the engine speed signal value decreases rapidly	Open or short in crankshaft position sensor circuit Crankshaft position sensor Flywheel sub-assembly (crank angle sensor plate) ECM assembly	Comes on	DTC stored
P0337	Crankshaft Position Sensor "A" Circuit Low Input	Output voltage of crankshaft position sensor less than 0.3 V for 1.85 seconds (1 trip detection logic).	Open or short in crankshaft position sensor circuit Crankshaft position sensor ECM assembly	Comes on	DTC stored
P0338	Crankshaft Position Sensor "A" Circuit High Input	Output voltage of crankshaft position sensor higher than 4.7 V for 1.85 seconds (1 trip detection logic).	Open or short in crankshaft position sensor circuit Crankshaft position sensor ECM assembly	Comes on	DTC stored

Reference: Inspection using an oscilloscope.

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HINT:

The correct waveform is as shown.

ECM Assembly Terminal Name	Between NE+ and NE-
Tester Range	2 V/DIV., 20 ms./DIV.
Condition	Idling with warm engine