DTC P0335: Crankshaft Position Sensor "A" Circuit: Notes

DTC detecting condition: 

Immediately at fault recognition

Trouble symptom: 

• Engine stalls.
• Failure of engine to start
  CAUTION: After servicing or replacing faulty parts, perform Clear Memory Mode. Refer to ENGINE (DIAGNOSTICS) (STI)>CLEAR MEMORY MODE>OPERATION ., and inspection mode. Refer to ENGINE (DIAGNOSTICS) (STI)>INSPECTION MODE>PROCEDURE .

Wiring diagram: 

Engine Electrical System. Refer to WIRING SYSTEM>ENGINE ELECTRICAL SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK CONDITION OF CRANKSHAFT POSITION SENSOR. 

   Check the crankshaft position sensor.

   Is the crankshaft position sensor installation bolt tightened securely?

   Yes:  Go to  2.

   No:  Tighten the crankshaft position sensor installation bolt securely. Refer to FUEL INJECTION (FUEL SYSTEMS) (STI)>CRANKSHAFT POSITION SENSOR .

2. CHECK CRANKSHAFT POSITION SENSOR. 
   1. Turn the ignition switch to OFF.
   2. Remove the crankshaft position sensor.
   3. Measure the resistance between terminals of crankshaft position sensor.

      Terminals 

      No. 1 - No. 2:

      Is the resistance between 1 and 4 kΩ?

      Yes:  Go to  3.

      No:  Replace the crankshaft position sensor. Refer to FUEL INJECTION (FUEL SYSTEMS) (STI)>CRANKSHAFT POSITION SENSOR .

3. CHECK HARNESS BETWEEN ECM AND CRANKSHAFT POSITION SENSOR CONNECTOR. 
   1. Disconnect the connector from ECM.
   2. Measure the resistance of harness between ECM connector and crankshaft position sensor connector.

      Connector & terminal 

      (B137) No. 17 - (E10) No. 1:

      (B137) No. 25 - (E10) No. 2:

      Is the resistance less than 1 Ω?

      Yes:  Repair the poor contact of ECM and crankshaft position sensor connector.

      No:  Repair the harness and connector.

      NOTE: In this case, repair the following item:

      • Open circuit in harness between ECM connector and crankshaft position sensor connector
      • Poor contact of coupling connector