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

-
DTC detecting condition:

Immediately at fault recognition

Trouble symptom:
- Engine stalls.
- Failure of engine to start
Wiring diagram:

Engine Electrical System Ref. to WIRING SYSTEM>ENGINE ELECTRICAL SYSTEM .

Courtesy of SUBARU OF AMERICA, INC.

CAUTION: Use the check board when measuring the ECM terminal voltage and resistance. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>General Description>PREPARATION TOOL>HOW TO USE CHECK BOARD .

NOTE: After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Basic Diagnostic Procedure>PROCEDURE .

CHECK INSTALLATION CONDITION OF CRANKSHAFT POSITION SENSOR .
1. Turn the ignition switch to OFF.
2. Check the installation condition of 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. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>Crankshaft Position Sensor>INSTALLATION .
CHECK POWER SUPPLY OF CRANKSHAFT POSITION SENSOR .
1. Disconnect the connector from the crankshaft position sensor.
2. Turn the ignition switch to ON.
3. Measure the voltage between crankshaft position sensor connector and engine ground.
  Connector & terminal
  
  (E10) No. 3 (+) - Engine ground (-):
Is the voltage 4.5 V or more?

Yes : Go to 3.

No : Repair the following item.
- Open circuit in harness between ECM connector and crankshaft position sensor connector
- Poor contact of ECM connector
CHECK HARNESS BETWEEN ECM AND CRANKSHAFT POSITION SENSOR CONNECTOR (OPEN) .
1. Turn the ignition switch to OFF.
2. Disconnect the connector from ECM.
3. Measure the resistance of harness between ECM connector and crankshaft position sensor connector.
  Connector & terminal
  
  (E159) No. 14 - (E10) No. 1:
  
  (E159) No. 22 - (E10) No. 2:
Is the resistance less than 1 Ω?

Yes : Go to 4.

No : Repair the open circuit in the harness between the ECM connector and crankshaft position sensor connector.
CHECK HARNESS BETWEEN ECM AND CRANKSHAFT POSITION SENSOR CONNECTOR (SHORT TO GROUND) .
Measure the resistance between crankshaft position sensor connector and engine ground.

Connector & terminal

(E10) No. 1 - Engine ground:

Is the resistance 1 MΩ or more?

Yes : Go to 5.

No : Repair short circuit to ground in harness between ECM connector and crankshaft position sensor connector.
CHECK HARNESS BETWEEN ECM AND CRANKSHAFT POSITION SENSOR CONNECTOR (SHORT TO POWER SUPPLY) .
1. Turn the ignition switch to ON.
2. Measure the voltage between crankshaft position sensor connector and engine ground.
  Connector & terminal
  
  (E10) No. 1 (+) - Engine ground (-):
Is the voltage 5 V or more?

Yes : Repair the short circuit to power in the harness between ECM connector and crankshaft position sensor connector.

No : Go to 6.
CHECK CRANKSHAFT POSITION SENSOR .
1. Turn the ignition switch to OFF.
2. Connect all connectors.
3. Check waveform of crankshaft position sensor. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Control Module I/O Signal>ELECTRICAL SPECIFICATION .
Is there any abnormality in waveform?

Yes : Replace the crankshaft position sensor. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>CRANKSHAFT POSITION SENSOR .

No : Repair the following item.
- Poor contact of ECM connector
- Poor contact of crankshaft position sensor connector