Click here

СИСТЕМА ECD, Diagnostic DTC:P0340

Click here
Click here
DTC Code DTC Name
P0340 Camshaft Position Sensor Circuit
Click here

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.

Table 1. 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 (1 trip detection logic).

  • Open or short in camshaft position sensor circuit

  • Camshaft position sensor

  • Camshaft timing pulley

  • Crankshaft position sensor

  • ECM
Idle engine for 1 second (STA off)

STA off:

When either condition below is met a certain number of times (1 trip detection logic):


  • Camshaft position sensor signal is not input with an engine speed of 650 rpm or more.

  • Phase deviation in crankshaft and camshaft position sensor signals with an engine speed of 650 to 3000 rpm.
Tip:

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


    • Difficulty starting

    • Misfire

    • Combustion noise

    • Black smoke

    • White smoke

    • Lack of power

Click here

WIRING DIAGRAM

Refer to DTC P0335 (Click here).

Click here

INSPECTION PROCEDURE

Note:

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

Tip:

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.

Click here

PROCEDURE


  1. Click here

    INSPECT CAMSHAFT POSITION SENSOR


    1. Inspect the camshaft position sensor (Click here).


  2. Click here

    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 - D105-80 (G+) Always Below 1 Ω
      D10-2 - D105-79 (G-) Always Below 1 Ω
      D10-1 or D105-80 (G+) - Body ground Always 10 kΩ or higher
      D10-2 or D105-79 (G-) - Body ground Always 10 kΩ or higher

    4. Reconnect the camshaft position sensor connector.

    5. Reconnect the ECM connector.


  3. Click here

    CHECK CAMSHAFT POSITION SENSOR (SENSOR INSTALLATION)


    1. A01BEM4E01

      Check the sensor installation.

      OK
      Sensor is installed correctly.

  4. Click here

    CHECK CAMSHAFT TIMING PULLEY


    1. Check the condition of the camshaft timing pulley.

      OK
      Timing pulley does not have any cracks or deformation.

  5. Click here

    CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR CIRCUIT)


    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).

    5. Turn the ignition switch off and wait for 30 seconds or more.

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

    7. Turn the GTS on.

    8. Check the engine condition while wiggling the crankshaft position sensor wire harness for 4 seconds or more when idling.

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

    10. Read the DTCs.

      Table 2. Result
      Result Proceed to
      Except below A
      There are problem such as rough idle or engine stall when wire harness is wiggled, or DTC is output* B
      Tip:

      *: As the DTC was stored due to a change in the contact resistance of the connector, repair or replace the wire harness or connector (Click here).


  6. Click here

    REPLACE ECM


    1. Replace the ECM (Click here).


  7. Click here

    REPLACE CAMSHAFT POSITION SENSOR


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


  8. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


  9. Click here

    SECURELY REINSTALL SENSOR


    1. Securely reinstall the sensor (Click here).


  10. Click here

    REPLACE CAMSHAFT TIMING PULLEY


    1. Replace the camshaft timing pulley (Click here).


  11. Click here

    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.


  12. Click here

    END