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 No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0335 | No CKP sensor signal to ECM (1 trip detection logic) |
|
| P0337 | Output voltage of CKP sensor 0.3 V or less for 4 seconds (1 trip detection logic) |
|
| P0338 | Output voltage of CKP sensor 4.7 V or more for 4 seconds (1 trip detection logic) |
|
- Reference: Inspection using an oscilloscope.
HINT:
G2+ stands for the camshaft position sensor signal, and NE+ stands for the CKP sensor signal.
STANDARDTester 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