DTC P0335: Crankshaft Position Sensor "A" Circuit; DTC P0339: Crankshaft Position Sensor "A" Circuit Intermittent: Description
WARNING: This page is about a different variant/trim than selected.
The crankshaft position sensor system consists of a crankshaft position sensor plate and a pickup coil.
The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of wound copper wire, an iron core and magnet. The sensor plate rotates and, as each tooth passes by the pickup coil, a pulse signal is created. The pickup coil generates 34 signals per crankshaft revolution. Based on these signals, the ECM calculates the crankshaft position and engine speed. Using these calculations, the fuel injection time and ignition timing are controlled.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0335 | One of the following condition is met when camshaft position sensor fail is not detected (1 trip detection logic):
|
|
| P0339 | Under conditions (a), (b) and (c), no crankshaft position 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.
- NE stands for the crankshaft position sensor signal.
- Grounding failure of the shielded wire may cause noise in waveforms.
Terminal No. (Symbol) Tool Setting Condition B50-14 (NE+) - B50-2 (NE-) 5 V/DIV, 20 ms/DIV Idling