СИСТЕМА SFI (для моделей с двойной системой VVT-i), Diagnostic DTC:P0335, P0339

DESCRIPTION

The crankshaft position sensor system consists of a sensor plate and a pickup coil.

The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of wound copper wire, an iron core and magnet. The sensor plate rotates and, as each tooth passes by the pickup coil, a pulse signal is created. The pickup coil generates 34 signals per crankshaft revolution. Based on these signals, the ECM calculates the crankshaft position and engine speed. Using these calculations, the fuel injection time and ignition timing are controlled.

• 

  Reference: Inspection using an oscilloscope.

  Tech Tips

  
  

  • NE stands for the crankshaft position sensor signal.

  • Grounding failure of the shielded wire may cause noise in the waveforms.

  Tester Connection	Tool Setting	Condition	Specified Condition
  D116-114 (NE+) - D116-113 (NE-)	5 V/DIV, 20 msec./DIV	Idling	The correct waveform is as shown

MONITOR DESCRIPTION

If there is no signal from the crankshaft position sensor despite the crankshaft revolving, the ECM interprets this as a malfunction of the sensor.

If the malfunction is not repaired successfully, a DTC is stored 10 seconds after the engine is next started.

MONITOR STRATEGY

COMPONENT OPERATING RANGE

CONFIRMATION DRIVING PATTERN

1. Connect the GTS to the DLC3.

2. Turn the ignition switch to ON and turn the GTS on.

3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

4. Turn the ignition switch off and wait for at least 30 seconds.

5. Turn the ignition switch to ON and turn the GTS on.

6. Start the engine.

7. Idle the engine for 20 seconds or more.

8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

9. Read the pending DTCs.

   Tech Tips

   
   

   • If a pending DTC is output, the system is malfunctioning.

   • If a pending DTC is not output, perform the following procedure.

10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

11. Input the DTC: P0335 or P0339.

12. Check the DTC judgment result.

    GTS Display	Description
    NORMAL	DTC judgment completed System normal
    ABNORMAL	DTC judgment completed System abnormal
    INCOMPLETE	DTC judgment completed Perform driving pattern after confirming DTC enabling conditions
    N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips

    
    

    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING GTS (ENGINE SPEED)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the GTS on.

   4. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Speed.

   5. Start the engine.

   6. Read the values displayed on the GTS while the engine is running.

      Standard
      Correct values are displayed.

      Tech Tips

      
      

      • To check the engine speed change, display the graph on the GTS.

      • If the engine does not start, check the engine speed while cranking.

      • If the engine speed indicated on the GTS remains at zero (0), there may be an open or short in the crankshaft position sensor circuit.

   
   

   NG

   INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE) Click here

   OK

   CHECK FOR INTERMITTENT PROBLEMS Click here

2. INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE)

   
   

   1. Inspect the crankshaft position sensor Click here.

   
   

   NG

   REPLACE CRANKSHAFT POSITION SENSOR Click here

   OK

3. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)

   
   

   1. Disconnect the crankshaft position sensor connector.

   2. Disconnect the ECM connector.

   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition D72-1 (NE) - D116-114 (NE+) Always Below 1 Ω D72-2 (NE-) - D116-113 (NE-) Always Below 1 Ω D72-1 (NE) or D116-114 (NE+) - Body ground Always 10 kΩ or higher D72-2 (NE-) or D116-113 (NE-) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)

   

   
   

   1. Check the crankshaft position sensor installation.

      OK
      Sensor is installed correctly.

   
   

   NG

   SECURELY REINSTALL SENSOR Click here

   OK

5. INSPECT CRANK POSITION SENSOR ROTOR (TEETH OF SENSOR PLATE)

   
   

   1. Check the teeth of the sensor plate.

      OK
      Sensor plate does not have any cracks or deformation.

   
   

   NG

   REPLACE CRANK POSITION SENSOR ROTOR Click here

   OK

6. REPLACE CRANKSHAFT POSITION SENSOR

   
   

   1. Replace the crankshaft position sensor Click here.

   
   

   NEXT

7. CHECK WHETHER DTC OUTPUT RECURS (DTC P0335 AND/OR P0339)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the GTS on.

   4. Clear the DTCs Click here.

   5. Turn the ignition switch off and wait for at least 30 seconds.

   6. Start the engine.

   7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

   8. Read the DTCs.

      Result

      Result	Proceed to
      No DTC is output	A
      P0335 or P0339 is output	B

      Tech Tips

      If the engine does not start, replace the ECM.

   
   

   B

   REPLACE ECM Click here

   A

   END