P0335
DTC P0335 CRANKSHAFT POSITION SENSOR "A" CIRCUITDTC P0339 CRANKSHAFT POSITION SENSOR "A" CIRCUIT INTERMITTENT
CIRCUIT DESCRIPTION
DTC Detection Condition:
The crankshaft position sensor system consists of a crankshaft position sensor plate and a pick-up coil. The sensor plate has 34 teeth and is installed on the crankshaft. The pick-up coil is made of an iron core and magnet. The sensor plate rotates and as each tooth passes through the pick-up coil, a pulse signal is created. The pick-up 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 the oscilloscope.
The correct waveform is as shown.
MONITOR DESCRIPTION
Monitor Strategy:
Typical Enabling Conditions:
Typical Malfunction Thresholds:
Component Operating Range:
If there is no signal from the crankshaft sensor even though the engine is revolving, the ECM interprets this as a malfunction of the sensor.
Wiring Diagram:
Step 1:
Step 2-4:
INSPECTION PROCEDURE
HINT:
- Read freeze frame data using the hand-held tester or the OBD II scan tool. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.
- READ VALUE WITH HAND-HELD TESTER OR OBD II SCAN TOOL
a. Connect the hand-held tester or the OBD II scan tool to the DLC3.
b. Start the engine and turn the hand-held tester or the OBD II scan tool ON.
c. Select the item: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / ENGINE SPD.
- The engine speed can be confirmed in DATA LIST using the hand-held tester or OBD II scan tool. If there is no NE signals from the crankshaft position sensor despite the engine revolving, the engine speed will be indicated as zero. If voltage output of the crankshaft position sensor is insufficient, the engine speed will be indicated as lower PRM (than the actual RPM).