ECD SYSTEM, Diagnostic DTC:P0340, P0344

DTC Code DTC Name
P0340 Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor)
P0344 Camshaft Position Sensor "A" Circuit Intermittent (Bank 1 or Single Sensor)

DESCRIPTION

The camshaft position sensor is installed on the cylinder head cover. The camshaft has a timing rotor for the camshaft position sensor. When the camshaft rotates, the tooth on the camshaft passes through the camshaft position sensor. The generated voltage in the sensor acts as a signal. The ECM locates each cylinder position based on the combination of this signal and crankshaft position sensor output.

P0340
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Engine cranks 4 revolutions or more.

Either of following conditions is met:


  • No camshaft position sensor signal to ECM

  • Phase deviation in crankshaft and camshaft position sensor signals

(1 trip detection logic)

  • Open or short in camshaft position sensor circuit

  • Camshaft position sensor

  • Camshaft assembly

  • ECM
P0344
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Engine cranks 6 revolutions or more.

Wrong pattern of signal from sensor is detected

(1 trip detection logic)

  • Open or short in camshaft position sensor circuit

  • Camshaft position sensor

  • Camshaft assembly

  • Valve timing

  • ECM

WIRING DIAGRAM

Refer to DTC P0335 Click here.

CAUTION / NOTICE / HINT

Note

When replacing the ECM, the ECM needs Registration and Initialization Click here.

Tech Tips


  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the intelligent tester. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the tester display.

  • Read freeze frame data using the intelligent tester. 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. A005KLBE09
      Text in Illustration
      *a

      Component without harness connected

      (Camshaft Position sensor)

      Disconnect the camshaft position sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 950 to 1250 Ω

    3. Reconnect the camshaft position sensor connector.


    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 (Check for Open)
      Tester Connection Condition Specified Condition
      B30-1 - B21-11 (G+) Always Below 1 Ω
      B30-2 - B21-10 (G-) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      B30-1 or B21-11 (G+) - Body ground Always 10 kΩ or higher
      B30-2 or B21-10 (G-) - Body ground Always 10 kΩ or higher

    4. Reconnect the camshaft position sensor.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  3. CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)


    1. A005K27E03
      Text in Illustration
      *a OK
      *b NG
      *c Clearance

      Check the camshaft position sensor installation.

      OK
      Sensor is installed correctly.

    NG

    SECURELY REINSTALL SENSOR Click here

    OK

  4. INSPECT CAMSHAFT ASSEMBLY (TIMING ROTOR)


    1. Inspect the timing rotor of the camshaft assembly.

      OK
      Camshaft timing rotor does not have any cracks or deformation.

    NG

    REPLACE CAMSHAFT ASSEMBLY Click here

    OK

  5. ADJUST VALVE TIMING


    1. Adjust the valve timing Click here.


    NEXT

  6. CHECK WHETHER DTC OUTPUT RECURS (DTC P0340 AND/OR P0344)


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTCs Click here.

    3. Start the engine.

    4. Enter the following menus: Powertrain / Engine and ECT / DTC.

    5. Read the DTCs.

      Result
      Result Proceed to
      DTC P0340 and/or P0344 A
      No DTC output B

    B

    END

    A

  7. REPLACE CAMSHAFT POSITION SENSOR


    1. Replace camshaft position sensor Click here.


    NEXT

    CHECK WHETHER DTC OUTPUT RECURS (DTC P0340 AND/OR P0344) Click here

  8. REPAIR OR REPLACE HARNESS OR CONNECTOR


    NEXT

    CHECK WHETHER DTC OUTPUT RECURS (DTC P0340 AND/OR P0344) Click here

  9. SECURELY REINSTALL SENSOR


    1. Securely reinstall sensor Click here.


    NEXT

    CHECK WHETHER DTC OUTPUT RECURS (DTC P0340 AND/OR P0344) Click here

  10. REPLACE CAMSHAFT ASSEMBLY


    1. Replace the camshaft assembly Click here.


    NEXT

  11. CHECK WHETHER DTC OUTPUT RECURS (DTC P0340 AND/OR P0344)


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTCs Click here.

    3. Start the engine.

    4. Enter the following menus: Powertrain / Engine and ECT / DTC.

    5. Read the DTCs.

      Result
      Result Proceed to
      DTC P0340 and/or P0344 A
      No DTC output B

    B

    END

    A

  12. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  13. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTCs Click here.

    3. Start the engine.

    4. Enter the following menus: Powertrain / Engine and ECT / DTC.

    5. Confirm that the DTC is not output again.


    NEXT

    END