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SFI SYSTEM, Diagnostic DTC:P0335, P0339

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

The crankshaft position sensor system consists of a crank angle sensor plate and a pickup coil. The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of an iron core and a magnet.

The sensor plate rotates and, as each tooth passes through the pickup coil, a pulse signal is created. The pickup coil generates 34 signals per engine rotation. Based on these signals, the ECM calculates the crankshaft position and engine speed. Using these calculations, the fuel injection timing and ignition timing are controlled.

DTC No. DTC Detection Condition Trouble Area
P0335

Either condition is met:


  • No crankshaft position sensor signal to ECM while cranking

    (1 trip detection logic)

  • No crankshaft position sensor signal to ECM at engine speed of 600 rpm or more

    (1 trip detection logic)

  • Open or short in crankshaft position sensor circuit

  • Crankshaft position sensor

  • Crankshaft position sensor plate

  • ECM
P0339

Under conditions (a), (b) and (c), no crankshaft position sensor signal to ECM for 0.05 seconds or more

(1 trip detection logic):

(a) Engine speed 1000 rpm or more

(b) Starter signal off

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

  • Open or short in crankshaft position sensor circuit

  • Crankshaft position sensor

  • Crankshaft position sensor plate

  • ECM

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WIRING DIAGRAM

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INSPECTION PROCEDURE

Tip:

  • If no problem is found through this diagnostic troubleshooting procedure, troubleshoot the engine mechanical system.

  • Check the engine speed. The engine speed can be checked using the intelligent tester. Follow the procedure 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 rotating 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.

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PROCEDURE


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    READ VALUE USING INTELLIGENT TESTER (ENGINE SPEED)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    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.
      Tip:

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

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

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


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    INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE)


    1. A01CF2VE10

      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 985 to 1600 Ω
      1 - 2 Hot 1265 to 1890 Ω
      Table 1. Text in Illustration
      *1

      Component without harness connected

      (Crankshaft Position Sensor)
      Note:

      Terms "cold" and "hot" refer to the temperature of the coils. "Cold" means approximately -10 to 50°C (14 to 122°F). "Hot" means approximately 50 to 100°C (122 to 212°F).

    3. Reconnect the crankshaft position sensor connector.


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    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 (Check for Open)
      Tester Connection Condition Specified Condition
      D51-1 - D41-122 (NE+) Always Below 1 Ω
      D51-2 - D41-121 (NE-) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      D51-1 or D41-122 (NE+) - Body ground Always 10 kΩ or higher
      D51-2 or D41-121 (NE-) - Body ground Always 10 kΩ or higher

    4. Reconnect the ECM connector.

    5. Reconnect the crankshaft position sensor connector.


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    CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)


    1. A01CFPDE25

      Check the crankshaft position sensor installation condition.

      OK
      Sensor is installed correctly.

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    CHECK CRANKSHAFT POSITION SENSOR PLATE (TEETH OF SENSOR PLATE)


    1. Check the teeth of the crankshaft position sensor plate.

      OK
      Crankshaft position sensor plate does not have any cracks or deformation.

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    CHECK FOR INTERMITTENT PROBLEMSClick here

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    REPLACE CRANKSHAFT POSITION SENSORClick here

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    REPAIR OR REPLACE HARNESS OR CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)

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    SECURELY REINSTALL CRANKSHAFT POSITION SENSORClick here

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    REPLACE CRANKSHAFT POSITION SENSOR PLATEClick here

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    REPLACE ECMClick here