P0335
DTC P0335 Crankshaft Position Sensor "A" CircuitDTC P0339 Crankshaft Position Sensor "A" Circuit Inter- mittent
DESCRIPTION
DTC Detection Condition:
The crankshaft position 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 timing are controlled.
Reference: Inspection using an oscilloscope.
The correct waveform is as given.
MONITOR DESCRIPTION
Monitor Strategy:
Typical Enabling Conditions:
Typical Malfunctions Thresholds:
Component Operating Range:
If there is no signal from the crankshaft position sensor even though the engine is running, the ECM interprets this as a malfunction of the sensor.
This monitor runs for 10 seconds (the first 10 seconds of engine idle) after the engine is started.
Wiring Diagram:
Step 1-2:
Step 3-4:
INSPECTION PROCEDURE
HINT:
- Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
- The engine speed can be confirmed in the DATA LIST using the intelligent tester. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / ENGINE SPD. If no NE signals are sent from the crankshaft position sensor even though the engine is running, the engine speed will be indicated as zero. If the output voltage of the crankshaft position sensor is insufficient, the engine speed will be indicated as lower than the actual RPM.