ECD SYSTEM(for DPF), Diagnostic DTC:P0340

DTC Code DTC Name
P0340 Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor)

DESCRIPTION

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

The G signal plate (timing sprocket) has one tooth 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.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0340 Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor)

STA on:

No camshaft position sensor signal is sent to the ECM while cranking for 4 seconds or more.

(2 trip detection logic)

STA off:

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

(1 trip detection logic)

STA off:

Phase deviation in crankshaft and camshaft position sensor signals with an engine speed of 650 to 3000 rpm occurs a certain number of times.

(1 trip detection logic)

  • Open or short in camshaft position sensor circuit

  • Camshaft position sensor

  • Crankshaft position sensor

  • Camshaft timing gear or sprocket

  • ECM

 Comes on DTC Stored

Tech Tips


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


    • Difficult starting

    • Misfire

    • Combustion noise

    • Black smoke

    • White smoke

    • Lack of power

CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern
P0340

  • Crank engine for 4 seconds (STA on)

  • Idle engine for 1 second (STA off)

WIRING DIAGRAM

Refer to DTC P0335 Click here.

CAUTION / NOTICE / HINT

Note

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

Tech Tips


  • After performing the inspection procedure for the camshaft position sensor, if DTC P0340 is output again, check the following items related to the crankshaft position sensor.


    • Installation condition of the crankshaft position sensor

    • No. 1 crankshaft position sensor plate

    • Connection of the crankshaft position sensor connector

  • 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

      Result
      Proceed to
      OK
      NG

    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
      B26-1 - B76-80 (G+) Always Below 1 Ω
      B26-2 - B76-79 (G-) Always Below 1 Ω
      B26-1 or B76-80 (G+) - Body ground Always 10 kΩ or higher
      B26-2 or B76-79 (G-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  3. CHECK CAMSHAFT POSITION SENSOR (SENSOR INSTALLATION)


    1. A00YTRPE01

      Check the sensor installation.

      OK
      Sensor is installed correctly.
      Result
      Proceed to
      OK
      NG

    NG

    SECURELY REINSTALL SENSOR Click here

    OK

  4. CHECK CAMSHAFT TIMING SPROCKET


    1. Check the condition of the timing sprocket.

      OK
      Timing sprocket does not have any cracks or deformation.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CAMSHAFT TIMING SPROCKET Click here

    OK

  5. 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.


      Powertrain > Engine > Clear DTCs

    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.


      Powertrain > Engine > Trouble Codes

    10. Read the DTCs.

      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

      Tech Tips

      *: 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


    B

    GO TO STEP 9 Click here

    A

  6. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click here

  7. REPLACE CAMSHAFT TIMING SPROCKET


    1. Replace the camshaft timing sprocket.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click here

  8. SECURELY REINSTALL SENSOR


    1. Securely reinstall the sensor.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click here

  9. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click here

  10. REPLACE CAMSHAFT POSITION SENSOR


    1. Replace the camshaft position sensor.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  11. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

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

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

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


      Powertrain > Engine > Trouble Codes

    8. Confirm that the DTC is not output again.

      Result
      Proceed to
      NEXT

    NEXT

    END