SFI SYSTEM(w/o Canister Pump Module), Diagnostic DTC:P0335 and 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 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 wound copper wire, an iron core and 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 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.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0335

Crankshaft Position Sensor "A" Circuit

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

  • Crankshaft (crank angle sensor plate)

  • ECM

Comes on

DTC stored

P0339

Crankshaft Position Sensor "A" Circuit Intermittent

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

  • Crankshaft (crank angle sensor plate)

  • ECM

-

DTC stored
  • A254145E07

    Reference: Inspection using an oscilloscope.

    Tip:

    Grounding failure of the shielded wire may cause noise in the waveforms.

    ECM Terminal Name

    Between NE+ and NE-

    Tester Range

    5 V/DIV., 20 ms./DIV.

    Condition

    Idling

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. Start the engine and run it at idle for 20 seconds or more.

WIRING DIAGRAM

A255252E09

CAUTION / NOTICE / HINT

Tip:

After performing the 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

Tip:

  • 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 GTS. To perform the check, follow the procedures below:

    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / 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 GTS. 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 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 / Primary / 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.

      Tip:

      • 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. Inspect the crankshaft position sensor.

      Click here

    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

      B28-1 (NE) - B77-76 (NE+)

      Always

      Below 1 Ω

      B28-2 (NE-) - B77-109 (NE-)

      Always

      Below 1 Ω

      B28-1 (NE) or B77-76 (NE+) - Body ground

      Always

      10 kΩ or higher

      B28-2 (NE-) or B77-109 (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)

    1. B319222E02

      Check the crankshaft position sensor installation.

      OK

      Crankshaft position sensor is installed correctly.

    Result

    Proceed to

    OK

    NG
    NG

    SECURELY REINSTALL CRANKSHAFT POSITION SENSOR

    Click hereClick 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 hereClick here