SFI SYSTEM, Diagnostic DTC:P0335, P0339

DESCRIPTION

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

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

• 

  *a	5 V/DIV.
  *b	20 ms./DIV.

  Reference: Inspection using an oscilloscope.

  Tech Tips

  
  

  • The correct waveform is as shown.

  • Grounding failure of the shielded wire may cause a noisy waveform.

  ECM Terminal Name	Between NE+ and NE-
  Tester Range	5 V/DIV., 20 ms./DIV.
  Condition	Idling with warm engine

MONITOR DESCRIPTION

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

MONITOR STRATEGY

CONFIRMATION DRIVING PATTERN

1. Connect the GTS to the DLC3.

2. Turn the ignition switch to ON.

3. Turn the GTS on.

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

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

6. Turn the ignition switch to ON.

7. Turn the GTS on.

8. Start the engine.

9. Idle the engine for 20 seconds or more [A].

10. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [B].

11. 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.

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

13. Input the DTC: P0335 or P0339.

14. Check the DTC judgment result.

    GTS Display	Description
    NORMAL	DTC judgment completed System normal
    ABNORMAL	DTC judgment completed System abnormal
    INCOMPLETE	DTC judgment not 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 steps [A] and [B] again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

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.

      
      Powertrain > Engine and ECT > Data List

      Tester Display
      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.

      Result
      Proceed to OK NG

   
   

   OK

   CHECK FOR INTERMITTENT PROBLEMS Click here

   NG

2. INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE)

   
   
   1. 

      *a	Component without harness connected (Crankshaft Position Sensor)

      Disconnect the crankshaft position sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition 1 - 2 Cold 1630 to 2740 Ω Hot 2065 to 3225 Ω

      Tech Tips

      In the table above, the terms "Cold" and "Hot" mean the temperature of the coils themselves. "Cold" is from -10 to 50°C (14 to 122°F) and "Hot" is from 50 to 100°C (122 to 212°F).

      Result
      Proceed to OK NG

   
   

   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 C78-1 (NE) - C58-76 (NE+) Always Below 1 Ω C78-2 (NE-) - C58-109 (NE-) Always Below 1 Ω C78-1 (NE) or C58-76 (NE+) - Body ground Always 10 kΩ or higher C78-2 (NE-) or C58-109 (NE-) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)

   

   *a

   Clearance

   
   

   1. Check the crankshaft position sensor installation condition.

      OK
      Crankshaft position sensor is installed correctly.

      Result
      Proceed to OK NG

   
   

   NG

   SECURELY REINSTALL CRANKSHAFT POSITION SENSOR Click here

   OK

5. INSPECT CRANKSHAFT (TEETH OF CRANK ANGLE SENSOR PLATE)

   
   

   1. Inspect the teeth of the crank angle sensor plate.

      OK
      Crank angle sensor plate does not have any cracks or deformation.

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE ECM Click here

   NG

   REPLACE CRANKSHAFT Click here