ECD 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 (NE signal) consists of a magnet, iron core and pickup coil.

The crankshaft angle sensor plate has 34 teeth and is installed on the injection pump drive gear. The NE signal sensor generates 34 signals of every engine revolution. The ECM detects the standard crankshaft angle based on the G signal from the camshaft position sensor, and the actual crankshaft angle and the engine speed by the NE signal.

P0335
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Crank or start engine

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

(a) No crankshaft position sensor signal to ECM while cranking for 4.7 seconds or more

(b) No crankshaft position sensor signal to ECM after cranking (engine revolution 600 rpm or more)

  • Open or short in crankshaft position sensor circuit

  • Crankshaft position sensor

  • Crankshaft angle sensor plate

  • ECM
P0339
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Engine running at 1000 rpm or more with vehicle stationary

In conditions (a), (b) and (c), no crankshaft position sensor (NE) signal is input for 0.05 seconds or more (1 trip detection logic).

(a) Engine revolution is 1000 rpm or more

(b) NE signal is off

(c) 3 seconds or more have elapsed after STA signal is switched from on to off

  • Open or short in crankshaft position sensor circuit

  • Crankshaft position sensor

  • Crankshaft angle sensor plate

  • ECM

WIRING DIAGRAM

A01CI11E01

INSPECTION PROCEDURE

Note

After replacing the ECM, the new ECM needs registration Click here and initialization Click here.

Tech Tips

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 be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, as well as other data recorded at the time of a malfunction.

PROCEDURE


  1. CHECK CRANKSHAFT POSITION SENSOR


    1. A01CH2QE03
      Text in Illustration
      *a

      Component with harness connected

      (ECM)
      *b G and NE Signal Waveform
      *c 5 V/DIV.
      *d 20 ms./DIV. (Idling)

      While idling the engine, check the waveform of the ECM connectors using an oscilloscope.

      Standard
      Tester Connection Specified Condition
      E37-7 (NE+) - E37-8 (NE-) Correct waveform appears as shown
      E37-13 (G+) - E37-14 (G-) Correct waveform appears as shown

    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 (Check for Open)
      Tester Connection Condition Specified Condition
      C14-1 (NE+) - E37-7 (NE+) Always Below 1 Ω
      C14-2 (NE-) - E37-8 (NE-) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      C14-1 (NE+) or E37-7 (NE+) - Body ground Always 10 kΩ or higher
      C14-2 (NE-) or E37-8 (NE-) - Body ground Always 10 kΩ or higher

    4. Reconnect the crankshaft position sensor connector.

    5. Reconnect the ECM connector.


    NG

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

    OK

  4. CHECK CRANKSHAFT POSITION SENSOR (SENSOR INSTALLATION)

    A01CIX2E40
    OK
    The crankshaft position sensor is installed properly.

    NG

    SECURELY REINSTALL CRANKSHAFT POSITION SENSOR Click here

    OK

  5. CHECK CRANKSHAFT POSITION SENSOR PLATE


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


    NG

    REPLACE CRANKSHAFT POSITION SENSOR PLATE Click here

    OK

    REPLACE ECM Click here