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: Description

The crankshaft position sensor system consists of a crank angle sensor plate and Magnetic Resistance Element (MRE) type sensor. The crank 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 outputs 34 rotation signals per engine revolution. The ECM uses the G2 signal to distinguish between the cylinders, and uses the NE signal to detect the crankshaft position and engine rpm.

DTC DETECTION CONDITION CHART

DTC No.	DTC Detection Condition	Trouble Area
P0335	No CKP sensor signal to ECM (1 trip detection logic)	Open or short in CKP sensor circuit CKP sensor CKP sensor plate ECM
P0337	Output voltage of CKP sensor 0 3 V or less for 4 seconds (1 trip detection logic)	Open or short in CKP sensor circuit CKP sensor CKP sensor plate ECM
P0338	Output voltage of CKP sensor 4 7 V or more for 4 seconds (1 trip detection logic)	Open or short in CKP sensor circuit CKP sensor CKP sensor plate ECM

Reference: Inspection using an oscilloscope

Fig 1: NE And G2 Signal Waveform Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

G2+ stands for the camshaft position sensor signal, and NE+ stands for the CKP sensor signal.

Standard

STANDARD CHART

Tester Connection	Tool Setting	Condition	Specified Condition
E1-27 (NE+) - E1-34 (NE-)	5 V/DIV, 20 msec /DIV	Cranking or idling	The correct waveform is as shown
E2-24 (G2+) - E2-32 (G2-)	5 V/DIV, 20 msec /DIV	Cranking or idling	The correct waveform is as shown