ECD SYSTEM (w/o DPF), Diagnostic DTC:P0340

DTC Code DTC Name
P0340 Camshaft Position Sensor Circuit

DESCRIPTION

The camshaft position sensor (G signal) consists of a magnet, iron core and pickup coil.

The G signal plate (timing pulley) has five teeth on its outer circumference and is installed on the camshaft. When the camshaft rotates, the protrusion on the signal plate and the air gap on the pickup coil change, causing fluctuations in the magnetic field that generate a voltage in the pickup coil.

The NE signal plate has 34 teeth and is mounted on the crankshaft angle sensor plate. The NE signal sensor generates 34 signals for every revolution. The ECM detects the camshaft angle based on the G signal, and detects the crankshaft angle based on the NE signal.

P0340
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Crank engine for 4 seconds (STA on)

STA on:

No camshaft position sensor signal is sent to the ECM while cranking for 4 seconds or more (2 trip detection logic).

  • Open or short in camshaft position sensor circuit

  • Camshaft position sensor

  • Camshaft timing pulley

  • ECM
Idle engine for 1 second (STA off)

STA off:

Either condition is met (1 trip detection logic):


  • G signal is not input with an engine speed of 650 rpm or more for 1 second.

  • While the engine speed is between 650 and 3000 rpm, a phase difference between the NE signal and G signal is detected consecutively for the specified number of times.

Tech Tips


  • If DTC P0340 is stored, the following symptoms may appear:


    • Difficulty starting

    • Misfire

    • Combustion noise

    • Black smoke

    • White smoke

    • Lack of power

WIRING DIAGRAM

Refer to DTC P0335 Click here.

INSPECTION PROCEDURE

Note

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

Tech Tips


  • Troubleshoot the camshaft position sensor first. If the cause of the problem cannot be found, perform the inspections below as the crankshaft position sensor may be the cause of the problem.


    • Inspect the installation condition of the crankshaft position sensor connector.

    • Inspect the No. 1 crankshaft position sensor plate.

    • Inspect the connection of the crankshaft position sensor connector.

    • Inspect the crankshaft position sensor connector circuit.

  • 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. INSPECT CAMSHAFT POSITION SENSOR


    1. Inspect the camshaft position sensor Click here.


    NG

    REPLACE CAMSHAFT POSITION SENSOR Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)


    1. Disconnect the camshaft 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
      D10-1 - D98-80 (G+) Always Below 1 Ω
      D10-2 - D98-79 (G-) Always Below 1 Ω
      D10-1 or D98-80 (G+) - Body ground Always 10 kΩ or higher
      D10-2 or D98-79 (G-) - Body ground Always 10 kΩ or higher

    4. Reconnect the camshaft position sensor connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  3. CHECK CAMSHAFT POSITION SENSOR (SENSOR INSTALLATION)


    1. A003GE7E01

      Check the sensor installation.

      OK
      Sensor is installed correctly.

    NG

    SECURELY REINSTALL SENSOR Click here

    OK

  4. CHECK CAMSHAFT TIMING PULLEY


    1. Check the condition of the camshaft timing pulley.

      OK
      Timing pulley does not have any cracks or deformation.

    NG

    REPLACE CAMSHAFT TIMING PULLEY Click here

    OK

  5. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  6. REPLACE CAMSHAFT POSITION SENSOR


    1. Replace the camshaft position sensor Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  7. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  8. SECURELY REINSTALL SENSOR


    1. Securely reinstall the sensor Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  9. REPLACE CAMSHAFT TIMING PULLEY


    1. Replace the camshaft timing pulley Click here.


    NEXT

  10. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs Click here.

    3. Turn the ignition switch off for 30 seconds or more.

    4. Start the engine and idle it for 4 seconds or more.

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

    6. Confirm that the DTC is not output again.


    NEXT

    END