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

-
DTC detecting condition:

Immediately at fault recognition

Trouble symptom:
- Engine stall
- 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) (H4DO)>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) (H4DO)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .
1. 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) (H4DO)>CRANKSHAFT POSITION SENSOR>INSTALLATION .
2. 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
3. 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
    
    (E158) No. 66 - (E10) No. 1:
    
    (E158) No. 68 - (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.
4. 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.
5. 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.
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) (H4DO)>CONTROL MODULE I/O SIGNAL .
  Is there any abnormality in waveform?
  
  Yes : Replace the crankshaft position sensor. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>CRANKSHAFT POSITION SENSOR .
  
  No : Repair the following item.
  - Poor contact of ECM connector
  - Poor contact of crankshaft position sensor connector