SFI SYSTEM(w/ EGR System), Diagnostic DTC:P0014,P0015,P0024 and P0025

DTC Code DTC Name
P0014 Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 1)
P0015 Camshaft Position "B" - Timing Over-Retarded (Bank 1)
P0024 Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 2)
P0025 Camshaft Position "B" - Timing Over-Retarded (Bank 2)

DESCRIPTION

Tip:

If DTC P0014, P0015, P0024 or P0025 is output, check the VVT (Variable Valve Timing) system.

The Variable Valve Timing (VVT) system includes the ECM, camshaft timing oil control valve and VVT controller. The ECM sends a target duty cycle control signal to the camshaft timing oil control valve. This control signal regulates the oil pressure supplied to the VVT controller. Camshaft timing control is performed according to engine operating conditions such as the intake air volume, throttle valve position and engine coolant temperature. The ECM controls the camshaft timing oil control valve based on the signals transmitted by several sensors. The VVT controller regulates the exhaust camshaft angle using oil pressure through the camshaft timing oil control valve. As a result, the relative positions of the camshaft and crankshaft are optimized, the engine torque and fuel economy improve, and the exhaust emissions decrease under overall driving conditions. The ECM detects the actual exhaust valve timing using signals from the VVT and crankshaft position sensors and performs feedback control. This is how the target exhaust valve timing is verified by the ECM.

A192077E40

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Memory

P0014

Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 1)

Exhaust valve timing is stuck at a certain value when in the advance range (2 trip detection logic).

  • Mechanical system (Timing chain has jumped tooth or chain stretched)

  • Camshaft timing oil control valve assembly for exhaust camshaft

  • Oil control valve filter

  • Camshaft timing exhaust gear assembly

  • ECM

Comes on

DTC stored

P0015

Camshaft Position "B" - Timing Over-Retarded (Bank 1)

Exhaust valve timing is stuck at a certain value when in the retard range (1 trip detection logic).

  • Mechanical system (Timing chain has jumped tooth or chain stretched)

  • Camshaft timing oil control valve assembly for exhaust camshaft

  • Oil control valve filter

  • Camshaft timing exhaust gear assembly

  • ECM

Comes on

DTC stored

P0024

Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 2)

Exhaust valve timing is stuck at a certain value when in the advance range (2 trip detection logic).

  • Mechanical system (Timing chain has jumped tooth or chain stretched)

  • Camshaft timing oil control valve assembly for exhaust camshaft

  • Oil control valve filter

  • Camshaft timing exhaust gear assembly

  • ECM

Comes on

DTC stored

P0025

Camshaft Position "B" - Timing Over-Retarded (Bank 2)

Exhaust valve timing is stuck at a certain value when in the retard range (1 trip detection logic).

  • Mechanical system (Timing chain has jumped tooth or chain stretched)

  • Camshaft timing oil control valve assembly for exhaust camshaft

  • Oil control valve filter

  • Camshaft timing exhaust gear assembly

  • ECM

Comes on

DTC stored

MONITOR DESCRIPTION

  1. The ECM optimizes the exhaust valve timing using the VVT (Variable Valve Timing) system to control the exhaust camshaft. The VVT system includes the ECM, camshaft timing oil control valve and VVT controller.

  2. The ECM sends a target duty cycle control signal to the camshaft timing oil control valve. This control signal regulates the oil pressure supplied to the VVT controller. The VVT controller can advance or retard the exhaust camshaft.

    If the difference between the target and actual exhaust valve timing is large, and changes in actual exhaust valve timing are small, the ECM interprets this as a VVT controller being stuck and stores a DTC.

    • Example:

    • A DTC is stored when the following conditions 1 and 2 are met:

    • 1. It takes 5 seconds or more to change the valve timing by 5°CA.

    • 2. After the above condition 1 is met, the OCV is forcibly activated 63 times or more (when the vehicle is idling, this takes approximately 100 seconds).

  3. These DTCs indicate that the VVT controller cannot operate properly due to camshaft timing oil control valve malfunctions or the presence of foreign objects in the camshaft timing oil control valve.

MONITOR STRATEGY

Required sensors/Components (Main)

Camshaft timing oil control valve assembly and Camshaft timing exhaust gear assembly

Required sensors/Components (Related)

Crankshaft position sensor, VVT sensor and Engine coolant temperature sensor

Frequency of operation

Continuous

CONFIRMATION DRIVING PATTERN

A232050E34
  1. Connect the intelligent tester to the DLC3.

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

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).

  4. Turn the engine switch off and wait for at least 30 seconds.

  5. Turn the engine switch on (IG) and turn the tester on [A].

  6. Start the engine and warm it up until the ECT reaches 75°C (167°F) or higher [B].

  7. Drive the vehicle at approximately 60 km/h (37 mph) for 10 minutes or more [C].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

  8. Idle the engine for 3 minutes or more [D].

  9. Enter the following menus: Powertrain / Engine and ECT / DTC [E].

  10. Read the pending DTCs.

    Tip:
    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  12. Input the DTC: P0014, P0015, P0024 or P0025.

  13. Check the DTC judgment result.

    Tester Display

    Description

    NORMAL

    • DTC judgment completed

    • System normal

    ABNORMAL

    • DTC judgment completed

    • System abnormal

    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions

    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tip:
    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform steps [F] through [H].

  14. Repeat the pattern of accelerating the vehicle from rest to approximately 60 km/h (37 mph) and then decelerating the vehicle 10 to 15 times [F].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

    Tip:

    Depress the accelerator pedal by a large amount.

  15. Idle the engine for 3 minutes or more [G].

  16. Enter the following menus: Powertrain / Engine and ECT / DTC [H].

  17. Read the pending DTCs.

    Tip:
    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  18. Check the DTC judgment result again.

    Tip:
    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

WIRING DIAGRAM

Refer to DTC P0013.

Click here

CAUTION / NOTICE / HINT

Tip:

Abnormal Bank

Timing Over-advanced

(Valve Timing Out of Specified Range)

Timing Over-retarded

(Valve Timing Out of Specified Range)

Bank 1

P0014

P0015

Bank 2

P0024

P0025

  • If DTC P0014 or P0015 is output, check the bank 1 VVT system for the exhaust camshaft circuit.

  • Bank 1 refers to the bank that includes the No. 1 cylinder.

  • If DTC P0024 or P0025 is output, check the bank 2 VVT system for the exhaust camshaft circuit.

  • Bank 2 refers to the bank that does not include the No. 1 cylinder.

  • 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, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

  1. CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0014, P0015, P0024 OR P0025)

    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

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

    5. Read DTCs.

      Powertrain > Engine and ECT > Trouble Codes

      Result

      Result

      Proceed to

      P0014, P0015, P0024 or P0025 is output

      A

      P0014, P0015, P0024 or P0025 and other DTCs are output

      B

      Tip:

      If any DTCs other than P0014, P0015, P0024 or P0025 are output, troubleshoot those DTCs first.

    B

    GO TO DTC CHART

    A
  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE)

    1. Connect the intelligent tester to the DLC3.

    2. Start the engine.

    3. Turn the tester on.

    4. Warm up the engine.

    5. Turn the A/C on.

    6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Exhaust Linear (Bank1) or Control the VVT Exhaust Linear (Bank2).

      Powertrain > Engine and ECT > Active Test

      Tester Display

      Control the VVT Exhaust Linear (Bank1)

      Powertrain > Engine and ECT > Active Test

      Tester Display

      Control the VVT Exhaust Linear (Bank2)

    7. Check the engine speed while operating the camshaft timing oil control valve using the tester.

      OK

      Tester Operation

      Specified Condition

      0%

      Normal engine speed

      100%

      Engine idles roughly or stalls

      Tip:

      Refer to "Data List / Active Test" [VVT Ex OCV Duty #1, VVT Ex Chg Angle #1, VVT Ex OCV Duty #2 and VVT Ex Chg Angle #2]

      Click here

      Result

      Result

      OK

      NG

    NG

    CHECK VALVE TIMING (CHECK FOR LOOSENESS IN TIMING CHAIN AND WHETHER TIMING CHAIN HAS JUMPED TOOTH)Click here

    OK
  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0014, P0015, P0024 OR P0025)

    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

    4. Clear DTCs.

      Click here

      Powertrain > Engine and ECT > Clear DTCs

    5. Warm up the engine.

    6. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

    7. Read the output pending DTCs using the intelligent tester.

      Powertrain > Engine and ECT > Trouble Codes

      OK

      No pending DTC output.

      Result

      Result

      OK

      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS

    NG
  4. CHECK VALVE TIMING (CHECK FOR LOOSENESS IN TIMING CHAIN AND WHETHER TIMING CHAIN HAS JUMPED TOOTH)

    A214700E04
    1. Remove the cylinder head cover LH and RH.

    2. Turn the crankshaft pulley and align its groove with the "0" alignment mark of the timing chain cover.

    3. Check that the alignment marks of the camshaft timing gears and camshaft timing exhaust gears are at the positions shown in the illustration.

      Tip:

      If the alignment marks are not as shown, turn the crankshaft one revolution clockwise.

      OK

      Alignment marks on camshaft timing gears are aligned as shown in the illustration.

      Result

      Result

      OK

      NG

    NG

    ADJUST VALVE TIMING

    OK
  5. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

    1. Inspect the camshaft timing oil control valve assembly.

      Click here

      Result

      Result

      OK

      NG

    NG

    REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

    OK
  6. INSPECT OIL CONTROL VALVE FILTER

    1. Remove the oil control valve filter.

      Click here

    2. Check that the filter is not clogged.

      OK

      Filter is not clogged.

      Result

      Result

      OK

      NG

    NG

    CLEAN OR REPLACE OIL CONTROL VALVE FILTER

    OK
  7. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY

    1. Replace the camshaft timing gear assembly.

      Click here

      Result

      Result

      NEXT

    NEXT
  8. CHECK WHETHER DTC OUTPUT RECURS

    1. Perform the Confirmation Driving Pattern.

      Powertrain > Engine and ECT > Trouble Codes

      OK

      No pending DTC is output and All Readiness is NORMAL.

      Tip:

      DTC P0014, P0015, P0024 or P0025 is stored when foreign objects in the engine oil are caught in some parts of the system. These codes will remain stored even if the system returns to normal after a short time. These foreign objects are then captured by the oil filter, thus eliminating the source of the problem.

      Result

      Result

      OK

      NG

    OK

    END

    NG

    REPLACE ECM