P0335
DTC P0335 CRANKSHAFT POSITION SENSOR "A" CIRCUITCIRCUIT DESCRIPTION
DTC Detection Condition:
The crankshaft position sensor (NE signal) consists of a magnet, iron core and pickup coil. The NE signal plate (crankshaft position sensor plate) has 34 teeth and is installed on the crankshaft. The NE signal sensor generates 34 signals for each engine revolution. This sensor monitors a plate (timing rotor) located on the crankshaft timing pulley and is used by the ECM to detect crankshaft angle and engine speed (RPM/NE). As the crankshaft timing pulley rotates through an engine revolution, this sensor communicates the rotation of the NE signal plate as a pulse signal to the ECM. Based on the signal, the ECM controls fuel injection time and ignition timing.
Reference: Inspection using the oscilloscope.
HINT: The correct waveform is as shown.
MONITOR DESCRIPTION
Monitor Strategy:
Typical Enabling Conditions:
Typical Malfunction Thresholds:
If there is no signal from the crankshaft sensor despite the engine revolving, the ECM interprets this as malfunction of the sensor.
Wiring Diagram:
Step 1 - 3:
Step 4:
INSPECTION PROCEDURE
HINT:
- Perform the troubleshooting of DTC P0335 first. If no trouble is found, troubleshoot the engine mechanical systems.
- Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.
- READ VALUE OF 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 push the hand-held tester or the OBD II scan tool main switch ON.
c. Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / ENGINE SPD".
The engine speed can be observed 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 from the crankshaft position sensor is insufficient, the engine speed will be indicated as lower PRM (than the actual RPM).