DTC P0335: Crankshaft Position Sensor "A" Circuit (TO 12/2010); DTC P0339: Crankshaft Position Sensor "A" Circuit Intermittent (TO 12/2010): Description
WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
The crankshaft position (CKP) sensor system consists of a crankshaft position 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 time are controlled.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0335 |
|
|
| P0339 | Under conditions (a), (b) and (c), no CKP sensor signal to ECM for 0.05 seconds or more (1 trip detection logic): (a) Engine speed 1000 rpm or more (b) Starter signal OFF (c) 3 seconds or more have elapsed since starter signal switched from ON to OFF |
- Reference: Inspection using an oscilloscope.
HINT:
- The correct waveform is as shown.
- VV1+ and VV2+ stand for the VVT sensor signal, and NE+ stands for the CKP sensor signal.
Item Content ECM Terminal Name Between VV1+ and VV1-, VV2+ and VV2-
Between NE+ and NE-Tester Range 5 V/DIV,
20 ms./DIV.Condition Idling with warm engine