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

1. - 

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.

1. CHECK DTC  .
   1. Turn the ignition switch to ON.
   2. Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Ref. to COMMON (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)

   Is DTC P06B4 displayed? (Current code)

   Yes  : Check for DTC P06B4. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC P06B4 SENSOR POWER SUPPLY "B" CIRCUIT LOW 

   No  : Go to  2.

2. CHECK DTC  .

   Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Ref. to COMMON (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)

   Is DTC P06B5 displayed? (Current code)

   Yes  : Check for DTC P06B5. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC P06B5 SENSOR POWER SUPPLY "B" CIRCUIT HIGH 

   No  : Go to  3.

3. 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  4.

   No  : Tighten the crankshaft position sensor installation bolt securely. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>CRANKSHAFT POSITION SENSOR

4. 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 

      (E65) No. 3 (+) - Engine ground (-):

   Is the voltage 4.5 V or more?

   Yes  : Go to  5.

   No  : Repair the following item.

   • Open circuit in harness between ECM connector and crankshaft position sensor connector
   • Poor contact of ECM connector
5. 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 

      (E52) No. 4 - (E65) No. 1:

      (E52) No. 5 - (E65) No. 2:

   Is the resistance less than 1 Ω?

   Yes  : Go to  6.

   No  : Repair the open circuit in the harness between the ECM connector and crankshaft position sensor connector.

6. 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 

   (E65) No. 1 - Engine ground:

   Is the resistance 1 MΩ or more?

   Yes  : Go to  7.

   No  : Repair short circuit to ground in harness between ECM connector and crankshaft position sensor connector.

7. 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 

      (E65) 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  8.

8. 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

   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