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 (CKP) sensor system consists of a CKP 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 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 revolution. Based on these signals, the ECM calculates the crankshaft position and engine rpm. Using these calculations, the fuel injection time and ignition timing are controlled.

DTC No. DTC Detection Condition Trouble Area
P0335

When either of the following conditions met:


  • Missing crankshaft position sensor signal despite camshaft position sensor signal inputs normal after engine cranked (2-trip detection logic)


  • No crankshaft position sensor signal to ECM at engine speed of 600 rpm or more (2-trip detection logic)

  • Open or short in crankshaft position sensor circuit

  • Crankshaft position sensor

  • Crankshaft

  • ECM
P0339

Following conditions (a), (b) and (c) met (1-trip detection logic):

(a) Engine speed 1000 rpm or more

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

(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

  • ECM

WIRING DIAGRAM

A011768E01

INSPECTION PROCEDURE

Tech Tips


  • 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 by using an 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 / Engine Speed.


    • The engine speed may be indicated as zero despite the engine revolving 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 an 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 / Engine Speed.

    5. Start the engine.

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

      OK
      Correct value is 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 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. A0117B3E12
      Text in Illustration
      *1

      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 20°C (68°F) 1850 to 2450 Ω

    3. Reconnect the crankshaft position sensor connector.


    NG

    REPLACE CRANKSHAFT POSITION SENSOR Click here

    OK

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


    1. A011AOME09
      Text in Illustration
      *1

      Front view of wire harness connector:

      (to Crankshaft Position Sensor)
      *2

      Front view of wire harness connector:

      (to ECM)

      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
      B27-1 (NE) - B8-93 (NE+) Always Below 1 Ω
      B27-2 (NE-) - B8-117 (NE-) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      B27-1 (NE) or B8-93 (NE+) - Body ground Always 10 kΩ or higher
      B27-2 (NE-) or B8-117 (NE-) - Body ground Always 10 kΩ or higher

    4. Reconnect the ECM connector.

    5. Reconnect the crankshaft position sensor connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)


    1. A011AT7E25

      Check the crankshaft position sensor installation condition.

      OK
      Sensor is installed correctly.

    NG

    SECURELY REINSTALL SENSOR

    OK

  5. INSPECT CRANKSHAFT POSITION SENSOR PLATE (TEETH OF SENSOR PLATE)


    1. Check the teeth of the sensor plate.

      OK
      Sensor plate does not have any cracks or deformation.

    NG

    REPLACE CRANKSHAFT Click here

    OK

    REPLACE ECM Click here