ECD SYSTEM(w/ Urea SCR System), Diagnostic DTC:P0337, P0338

DTC Code DTC Name
P0337 Crankshaft Position Sensor "A" Circuit Low Input
P0338 Crankshaft Position Sensor "A" Circuit High Input

DESCRIPTION

Refer to DTC P0335 Click here.

P0337
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Engine switch on (IG) for 4 seconds or more

Output voltage of crankshaft position sensor is less than 0.3 V for 4 seconds.

(1 trip detection logic)

  • Open or short in crankshaft position sensor circuit

  • Crankshaft position sensor

  • ECM
P0338
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Engine switch on (IG) for 4 seconds or more

Output voltage of crankshaft position sensor is higher than 4.7 V for 4 seconds.

(1 trip detection logic)

  • Crankshaft position sensor

  • Crankshaft (crank angle sensor plate)

  • ECM

Tech Tips


  • If DTC P0337 or P0338 is stored, the following symptoms may appear:


    • Difficulty starting

    • Misfire

    • Combustion noise

    • Black smoke

    • White smoke

    • Lack of power


  • B001HCLE03
    *a 2 V/DIV.
    *b 20 msec./DIV.

    Reference: Inspection using an oscilloscope.

    The correct waveform is as shown.

    ECM Terminal Name

    Between G2+ and G2-

    Between NE+ and NE-
    Tester Range 2 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

MONITOR DESCRIPTION

When the sensor output voltage remains at less than 0.3 V, or higher than 4.7 V, the ECM stores a DTC.

WIRING DIAGRAM

Refer to DTC P0335 Click here.

CAUTION / NOTICE / HINT

Note

After replacing the ECM, the new ECM needs registration (See page ) and initialization Click here.

Tech Tips

Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG) and turn the GTS on.

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

    4. Clear the DTCs Click here.

    5. Turn the engine switch off for 30 seconds or more.

    6. Disconnect the crankshaft position sensor connector.

    7. Turn the engine switch on (IG) for 4 seconds or more.

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

      Result
      Result Proceed to
      DTC does not change A
      DTC changes B

    B

    REPLACE CRANKSHAFT POSITION SENSOR Click here

    A

  2. CHECK ECM (CRANKSHAFT POSITION SENSOR VOLTAGE)


    1. B001FHEE01
      Text in Illustration
      *a

      Component with harness connected

      (ECM)

      Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C152-20 (VCNE) - C152-19 (NE-) Engine switch on (IG) 4.5 to 5.5 V

    NG

    REPLACE ECM 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
      r7-1 (NE+) - C152-28 (NE+) Always Below 1 Ω
      r7-2 (NE-) - C152-19 (NE-) Always Below 1 Ω
      r7-1 (NE+) or C152-28 (NE+) - Body ground and other terminals Always 10 kΩ or higher
      r7-2 (NE-) or C152-19 (NE-) - Body ground and other terminals Always 10 kΩ or higher

    4. Reconnect the crankshaft position sensor connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  4. CHECK ECM (CHECK RESISTANCE)


    1. B001E42E01
      Text in Illustration
      *a

      Component with harness connected

      (ECM)

      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
      C152-20 (VCNE) - C152-28 (NE+) Engine switch off No short or open circuit
      C152-28 (NE+) - C152-19 (NE-) Engine switch off No short or open circuit

    3. Reconnect the crankshaft position sensor connector.


    NG

    REPLACE ECM Click here

    OK

  5. REPLACE CRANKSHAFT POSITION SENSOR


    1. Replace the crankshaft position sensor Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  6. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  7. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  8. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG) and turn the GTS on.

    3. Clear the DTCs Click here.

    4. Turn the engine switch off for 30 seconds or more.

    5. Turn the engine switch on (IG) for 4 seconds or more.

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

    7. Confirm that the DTC is not output.


    NEXT

    END