SFI SYSTEM, 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 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 a 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 engine speed. Based on these signals, the ECM calculates the crankshaft position and engine speed. Using these calculations, the fuel injection duration and ignition timing are controlled.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0335

Crankshaft Position Sensor "A" Circuit

When 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 cam 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

Comes on

DTC stored

P0339

Crankshaft Position Sensor "A" Circuit Intermittent

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

  • No. 1 crankshaft position sensor plate

  • ECM

-

DTC stored
  • A254145E01

    Reference: Inspection using an oscilloscope.

    Tip:

    • The correct waveform is as shown.

    • Grounding failure of the shielded wire may cause a noisy waveform.

    ECM Terminal Name

    Between NE+ and NE-

    Tester Range

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

    Condition

    Idling with warm engine

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.

CONFIRMATION DRIVING PATTERN

  1. Connect the GTS to the DLC3.

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

  6. Start the engine.

  7. Idle the engine for 20 seconds or more.

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

  9. Read the pending DTCs.

    Tip:

    • 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.

    GTS 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
    Tip:

    • 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

A255252E07

CAUTION / NOTICE / HINT

Tip:

  • 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 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 / 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 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 / All Data / 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.

      OK

      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 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) - B75-78 (NE+)

      Always

      Below 1 Ω

      B28-2 (NE-) - B75-110 (NE-)

      Always

      Below 1 Ω

      B28-1 (NE) or B75-78 (NE+) - Body ground

      Always

      10 kΩ or higher

      B28-2 (NE-) or B75-110 (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. B319222E01

      Check the crankshaft position sensor installation condition.

      OK

      Crankshaft position sensor is installed correctly.

    Result

    Proceed to

    OK

    NG
    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 No. 1 crankshaft position the sensor plate.

      OK

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

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE NO. 1 CRANKSHAFT POSITION SENSOR PLATE

    (Click hereClick here)

    OK

  6. REPLACE CRANKSHAFT POSITION SENSOR

    1. Replace the crankshaft position sensor (Click here).

    Result

    Proceed to

    NEXT
    NEXT

  7. CHECK WHETHER DTC OUTPUT RECURS (DTC P0335 AND/OR P0339)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs (Click here).

      Powertrain > Engine and ECT > Clear DTCs

    5. Start the engine.

    6. Turn the GTS on.

    7. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

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

      Powertrain > Engine and ECT > Trouble Codes

    9. Read the DTCs.

      Result

      Result

      Proceed to

      DTC is not output

      A

      DTC P0335 and/or P0339 are output

      B
      Tip:

      If the engine does not start, replace the ECM.

    A

    END

    B

    REPLACE ECM

    (Click here)