SFI SYSTEM, Diagnostic DTC:P0335, P0339

DTC Code DTC Name
P0335 Crankshaft Position Sensor "A" Circuit
P0339 Crankshaft Position Sensor "A" Circuit Intermittent

DESCRIPTION

The crankshaft position sensor system consists of a No. 1 crankshaft position sensor plate and a pickup coil.

The No. 1 crankshaft position 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 No. 1 crankshaft position 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 and ignition timing are controlled.

DTC No. DTC Detection Condition Trouble Area
P0335

One of the following conditions is met (1 trip detection logic):


  • No crankshaft position sensor signal to ECM while cranking

  • No crankshaft position sensor signal to ECM while engine running

  • Missing crankshaft position sensor signal despite camshaft position sensor signal inputs normal after engine cranked

  • Open or short in crankshaft position sensor circuit

  • Crankshaft position sensor

  • No. 1 crankshaft position sensor plate

  • ECM
P0339

All of the following conditions are met (1 trip detection logic):

(a) The engine speed is 1000 rpm or higher.

(b) No crankshaft position sensor signal for 0.05 seconds or more.

(c) 3 seconds or more have elapsed since the starter signal switched from on to off.

  • Open or short in crankshaft position sensor circuit

  • Crankshaft position sensor

  • No. 1 crankshaft position sensor plate

  • ECM

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

Required Sensors/Components (Main) Crankshaft position sensor
Required Sensors/Components (Related) Camshaft position sensor
Frequency of Operation Continuous

COMPONENT OPERATING RANGE

Crankshaft position sensor

  • Crankshaft position sensor output voltage fluctuates while crankshaft revolving

  • 34 crankshaft position sensor signals per crankshaft revolution

CONFIRMATION DRIVING PATTERN


  1. Connect the intelligent tester to the DLC3.

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

  6. Start the engine.

  7. Idle the engine for 20 seconds or more.

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

  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.

    Tester 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 the Confirmation Driving Pattern and check the DTC judgment result again.

WIRING DIAGRAM

A01EU7HE06

INSPECTION PROCEDURE

Tech Tips


  • After performing the inspection procedure for the crankshaft position sensor, if DTC P0335 is output again, check the following items related to the camshaft position sensor.


    • Installation condition of the camshaft position sensor

    • Installation condition of the camshaft

    • Connection of the camshaft position sensor connector


  • If no problem is found by this diagnostic troubleshooting procedure, check for problems by referring to the engine mechanical section.

  • The engine speed can be checked by using the intelligent tester. To perform the check, follow the procedures below:


    1. Connect the intelligent tester to the DLC3.

    2. Start the engine.

    3. Turn the tester on.

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


    • The engine speed may be indicated as zero despite the engine running normally. This is caused by a lack of NE signals from the crankshaft position sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed if the crankshaft position sensor output voltage is insufficient.


  • Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (ENGINE SPEED)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

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

    5. Start the engine.

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

      Standard
      Correct values are displayed.

      Tech Tips


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

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

      • If the engine speed indicated on the tester 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
      E84-1 - E83-122 (NE+) Always Below 1 Ω
      E84-2 - E83-121 (NE-) Always Below 1 Ω
      E84-1 or E83-122 (NE+) - Body ground Always 10 kΩ or higher
      E84-2 or E83-121 (NE-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)

    A01ETQSE25

    1. Check the crankshaft position sensor installation condition.

      OK
      Crankshaft position sensor is installed correctly.

    NG

    SECURELY REINSTALL CRANKSHAFT POSITION SENSOR Click here

    OK

  5. INSPECT NO. 1 CRANKSHAFT POSITION SENSOR PLATE (TEETH OF SENSOR PLATE)


    1. Inspect the teeth of the No. 1 crankshaft position sensor plate.

      OK
      No. 1 crankshaft position sensor plate does not have any cracks or deformation.

    NG

    REPLACE NO. 1 CRANKSHAFT POSITION SENSOR PLATE Click here

    OK

    REPLACE ECM Click here