P0335

DTC PO335 CRANKSHAFT POSITION SENSOR CIRCUIT MALFUNCTION (CRANK)

Description
The crankshaft position sensor is installed on the oil pump, located in the front center portion of the cylinder block, to detect the crankshaft position. It is designed so that the Engine Control Module (ECM) accurately reads the number of pulses which occur when protrusions provided at the perimeter of the crankshaft sprocket (rotating together with the crankshaft) cross the crankshaft position sensor.





The crankshaft position sensor is a molded type which consists of a magnet, core, coil, terminals, etc.
1. Terminal
2. Yoke Core
3. Magnet
4. Coil
5. Core
6. Cover





The crankshaft sprocket is provided with six protrusions. Crankshaft rotation causes these protrusions to cross the crankshaft position sensor so that magnetic fluxes in the coil change with the change in air gap between the sensor pick-up and the sprocket. The change in air gap induces an electromotive force which is transmitted to the ECM.

DTC Detecting Condition.
Immediately at fault recognition.

Trouble Symptom
- Engine stalls.
- Failure of Engine to start.


Circuit Wiring Diagram










Procedure




1. Check harness.





a. Turn ignition switch to "OFF".
b. Disconnect connector from crankshaft position sensor.
c. Measure resistance of harness between crankshaft position sensor connector and body.
[CHECK]: Connector & terminal: (E10) No. 1 - Body/ 100 K-Ohms or more.
[YES]: Check and repair the following items.
- Open circuit of harness between crankshaft position sensor connector and ECM connector.
- Poor contact in ECM connector.
- Poor contact in the coupling connector (B20)
[NO]: Go to next [CHECK].





[CHECK]: Connector & terminal: (E10) No. 1 - Body/ 10 Ohms or less.
[YES]: Repair short circuit of harness between crankshaft position sensor connector and ECM connector.

NOTE: The harness between both connectors is shielded. Repair short circuit of harness together with shield.

[NO]: Go to next [CHECK].





[CHECK]: Connector & terminal: (E10) No. 2 - Body/ 10 Ohms or less.
[NO]: Check and repair the following items.
- Open circuit of harness between Crankshaft Position Sensor connector and ECM connector.
- Poor contact in ECM connector.
- Poor contact in the coupling connector (B20).
[YES]: Go to step 2.

2. Check crankshaft position sensor.
[CHECK]: Check for secure tightening of the installation bolts of the crankshaft position sensor.
[NO]: Tighten securely.
[YES]: Go to the next step.





a. Remove crankshaft position sensor.
b. Measure resistance between connector terminals of Crankshaft Position Sensor.
[CHECK]: Terminals:
No. 1 - No. 2/1 - 4 K-Ohms.
[YES]: Repair poor contact in crankshaft position sensor connector.
[NO]: Replace crankshaft position sensor.