DTC P0335 Crankshaft Position Sensor "A" Circuit: DTC P0339 Crankshaft Position Sensor "A" Circuit Intermittent: Description

WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

The Crankshaft Position (CKP) sensor system consists of a CKP sensor plate and a magnetic coil. The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of windings, an iron core and magnet. The sensor plate rotates and as each tooth passes through the pickup coil, a pulse signal is created. The pickup coil generates 34 signals for each engine revolution. Based on these signals, the ECM calculates the crankshaft position and engine RPM. Using these calculations, the fuel injection time and ignition timing are controlled.

DTC TROUBLE DETECTION CONDITION

DTC No.	DTC Detection Condition	Trouble Area
P0335	No CKP position sensor signal to ECM during cranking (1 trip detection logic) No CKP sensor signal to ECM with engine at 600 rpm or more (1 trip detection logic)	Open or short in Crankshaft Position (CKP) sensor circuit Crankshaft Position (CKP) sensor Signal plate (CKP sensor plate) ECM
P0339	No CKP sensor signal to ECM is input for 0.05 seconds or more, and conditions (a), (b) and (c) are met: 1,000 rpm or more Starter is OFF 3 seconds or more have elapsed after STA signal is switched from ON or OFF	Open or short in CKP sensor circuit CKP sensor Signal plate (CKP sensor plate) ECM

Fig 1: VV1, VV2 And NE Signal Waveform

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Reference: Inspect using an oscilloscope.

The correct waveform is as shown.

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
E7-25 (VV1+) - E7-24 (VV1-)	Correct waveform is as shown
E7-18 (VV2+) - E7-28 (VV2-)	Correct waveform is as shown
E7-21 (NE+) - E7-20 (NE-)	Correct waveform is as shown