SFI 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

Refer to DTC P0013.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

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).

  • Valve timing

  • Camshaft timing oil control valve assembly (for exhaust side of bank 1)

  • Oil control valve filter (RH)

  • Oil pipe

  • Camshaft timing exhaust gear assembly (bank 1)

  • 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).

  • Valve timing

  • Camshaft timing oil control valve assembly (for exhaust side of bank 1)

  • Oil control valve filter (RH)

  • Oil pipe

  • Camshaft timing exhaust gear assembly (bank 1)

  • 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).

  • Valve timing

  • Camshaft timing oil control valve assembly (for exhaust side of bank 2)

  • Oil control valve filter (LH)

  • Oil pipe

  • Camshaft timing exhaust gear assembly (bank 2)

  • 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 advance range (2 trip detection logic).

  • Valve timing

  • Camshaft timing oil control valve assembly (for exhaust side of bank 2)

  • Oil control valve filter (LH)

  • Oil pipe

  • Camshaft timing exhaust gear assembly (bank 2)

  • ECM

Comes on

DTC stored

MONITOR DESCRIPTION

The ECM optimizes the exhaust valve timing using the Variable Valve Timing (VVT) system to control the exhaust camshaft. The VVT system includes the ECM, the camshaft timing oil control valve assembly (for exhaust side) and the VVT controller (camshaft timing exhaust gear assembly). The ECM sends a target duty-cycle control signal to the camshaft timing oil control valve assembly (for exhaust side). 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 the actual exhaust valve timing are small, the ECM interprets this as a VVT controller stuck malfunction and stores a DTC.

Example:

A DTC is stored when the following conditions "A" and "B" are met:

  • (a) It takes 5 seconds or more to change the valve timing by 5°CA (Condition "A").

  • (b) After the above condition "A" is met, the camshaft timing oil control valve assembly is forcibly activated 63 times or more (when the vehicle is idling, this takes approximately 100 seconds) (Condition "B").

DTCs P0014 and P0024 (Advanced Cam Timing) are subject to 2 trip detection logic.

DTCs P0015 and P0025 (Retarded Cam Timing) are subject to 1 trip detection logic.

These DTCs indicate that the VVT controller cannot operate properly due to a camshaft timing oil control valve assembly (for exhaust side) malfunction or the presence of foreign objects in the camshaft timing oil control valve assembly (for exhaust side).

CONFIRMATION DRIVING PATTERN

A232050E48

  1. Connect the GTS to the DLC3.

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

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

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

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

  6. Start the engine and warm it up until the engine coolant temperature 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 / Trouble Codes [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.

    GTS 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 / Trouble Codes [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 is out of specified range)

Timing Over Retarded

(Valve timing is out of specified range)

Bank 1

P0014

P0015

Bank 2

P0024

P0025

  • If DTC P0014 or P0015 is output, check the VVT system (for exhaust side of bank 1) circuit.

  • If DTC P0024 or P0025 is output, check the VVT system (for exhaust side of bank 2) circuit.

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

    *: The No. 1 cylinder is the cylinder which is farthest from the transmission.

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

  • DTC P0014, P0015, P0024 or P0025 may be stored when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain stored even if the system returns to normal after a short time. Foreign objects may then be captured by the oil filter.

  • Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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 GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

      Powertrain > Engine and ECT > Trouble Codes

    5. Read the DTCs.

      Result

      Result

      Proceed to

      DTC P0014, P0015, P0024 or P0025 is output

      A

      DTC 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

    Click hereClick here

    A

  2. PERFORM ACTIVE TEST USING GTS (CONTROL THE VVT EXHAUST LINEAR)

    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Exhaust Linear (Bank 1) or Control the VVT Exhaust Linear (Bank 2).

      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)

    5. Check the engine speed while operating the camshaft timing oil control valve assembly (for exhaust side) usingthe GTS.

      OK

      GTS Operation

      Engine 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

    Proceed to

    OK

    NG
    NG

    CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH)Click here

    OK

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

    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.

      Click here

      Powertrain > Engine and ECT > Clear DTCs

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

    6. Turn the engine switch on (IG).

    7. Turn the GTS on.

    8. Start the engine and warm it up.

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

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

      Powertrain > Engine and ECT > Trouble Codes

    11. Read the pending DTCs.

      Result

      Result

      Proceed to

      DTC is not output

      A

      DTC P0014, P0015, P0024 or P0025 is output

      B
      Tip:

      DTC P0014, P0015, P0024 or P0025 may be stored when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain stored even if the system returns to normal after a short time. Foreign objects may then be captured by the oil filter.

    A

    CHECK FOR INTERMITTENT PROBLEMS

    Click here

    B

  4. CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH)

    1. Remove the cylinder head cover sub-assemblies RH and LH.

      Click here

      A294365C01

      *1

      Timing Mark

      -

      -

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

    3. Check that the timing marks of the camshaft timing gear assemblies and camshaft timing exhaust gear assemblies are aligned with the timing marks of the bearing cap as shown in the illustration.

      Tip:

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

      OK

      The timing marks on the camshaft timing gear assemblies and camshaft timing exhaust gear assemblies are aligned as shown in the illustration.

    Result

    Proceed to

    OK

    NG
    NG

    ADJUST VALVE TIMING

    Click here

    OK

  5. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST SIDE)

    1. Inspect the camshaft timing oil control valve assembly (for exhaust side).

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST SIDE)

    Click here

    OK

  6. INSPECT OIL CONTROL VALVE FILTER AND PIPE

    1. A225778C02

      *A

      Bank 2

      *B

      Bank 1

      *1

      No. 1 Oil Pipe

      *2

      No. 2 Oil Pipe

      Remove the No. 1 oil pipe or No. 2 oil pipe.

      Click here

    2. Remove the oil control valve filter RH or oil control valve filter LH.

    3. Check that the oil control valve filter and oil pipe are not clogged.

      OK

      The oil control valve filter or oil pipe is not clogged.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE OIL CONTROL VALVE FILTER OR OIL PIPE

    OK

  7. REPLACE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY

    1. Replace the camshaft timing exhaust gear assembly (bank 1 or bank 2).

      Click here

    Result

    Proceed to

    NEXT
    NEXT

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

    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.

      Click here

      Powertrain > Engine and ECT > Clear DTCs

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

    6. Turn the engine switch on (IG).

    7. Turn the GTS on.

    8. Start the engine and warm it up.

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

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

      Powertrain > Engine and ECT > Trouble Codes

    11. Read the pending DTCs.

      Result

      Result

      Proceed to

      DTC is not output

      A

      DTC P0014, P0015, P0024 or P0025 is output

      B
    A

    END

    B

    REPLACE ECM

    Click here