P0335

DTC P0335 CRANKSHAFT POSITION SENSOR "A" CIRCUIT

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.

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

If there are no signals 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:
- Perform troubleshooting of DTC P0335 first. If no trouble is found, troubleshoot the engine mechanical systems.

- Read freeze frame data using the hand-held 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.

- Read value of hand-held tester
a. Connect the hand-held tester to the DLC3.
b. Start the engine and turn the hand-held tester 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. 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 RPM (than the actual RPM).