Circuit Description

WARNING: This page is about a different car, the 2004 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

The crankshaft position sensor (NE signal) consists of a magnet, iron core and pickup coil.

The NE signal plate (crankshaft position sensor plate) has 34 teeth and is installed on the crankshaft. The NE signal sensor generates 34 signals for each engine revolution. This sensor monitors a plate (timing rotor) located on the crankshaft timing pulley and is used by the ECM to detect crankshaft angle and engine speed (RPM/NE). As the crankshaft timing pulley rotates through an engine revolution, this sensor communicates the rotation of the NE signal plate as a pulse signal to the ECM. Based on the signal, the ECM controls fuel injection time and ignition timing.

DTC DETECTION CONDITION

DTC No.	DTC Detection Condition	Trouble Area
P0335	No crankshaft position sensor signal to ECM during cranking (2 trip detection logic)	Open or short in crankshaft position sensor circuit Crankshaft position sensor Signal plate (crankshaft) ECM
P0335	No crankshaft position sensor signal to ECM with engine speed 600 rpm or more (2 trip detection logic)
P0339	In condition (a), (b) and (c), when no crankshaft position sensor (NE+) signal is input for 0.05 seconds or more. Engine revolution 1,000 rpm or more STA signal is OFF 3 seconds or more has lapsed after STA signal is switched from ON to OFF.

Fig 1: Crankshaft Position Sensor Waveform Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Reference: Inspection using the oscilloscope.

HINT:

The correct waveform is as shown on the left.

ITEM DESCRIPTION

Item	Contents
Terminal	CH1: G22+-NE- CH2: NE+-NE-
Equipment Set	5V/Division, 20 ms/Division
Condition	During cranking or idling