SFI SYSTEM, Diagnostic DTC:P0014, P0015, P0024, 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. DTC Detection Condition Trouble Area

P0014

P0024

With engine warmed up and idling, exhaust valve timing does not change for 1 minute or more in advanced position

(2 trip detection logic)

  • Valve timing

  • Camshaft timing oil control valve for exhaust side (bank 1, 2)

  • Camshaft timing oil control valve filter (bank 1, 2)

  • Camshaft timing exhaust gear assembly

  • ECM

P0015

P0025

With engine warmed up and vehicle being driven, exhaust valve timing does not change for 5 minutes or more in retarded position

(1 trip detection logic)

  • Valve timing

  • Camshaft timing oil control valve for exhaust side (bank 1, 2)

  • Camshaft timing oil control valve filter (bank 1, 2)

  • Camshaft timing exhaust gear assembly

  • ECM

MONITOR DESCRIPTION

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, the camshaft timing oil control valve and the 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. 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 the VVT controller stuck malfunction and sets a DTC.

Example:

A DTC is set when the following conditions (1), (2) and (3) are met:

(1) The difference between the target and actual exhaust valve timing is more than 5°CA (Crankshaft Angle) and the condition continues for more than 5 seconds.

(2) It takes 5 seconds or more to change the valve timing by 5°CA.

(3) After above procedures (1) and (2) are met, the camshaft timing oil control valve is forcibly activated 63 times or more.

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 camshaft timing oil control valve malfunctions or the presence of foreign objects in the camshaft timing oil control valve.

The monitor will not run unless the following conditions are met:


WIRING DIAGRAM

Refer to DTC P0013 Click here.

INSPECTION PROCEDURE

Tech Tips

Abnormal Bank

Advanced Timing Over

(Valve timing is out of specified range)

Retarded Timing Over

(Valve timing is out of specified range)
Bank 1 P0014 P0015
Bank 2 P0024 P0025

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

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

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

  • Bank 2 refers to the bank that does not include 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 ANY OTHER DTC 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) and turn the tester ON.

    3. Enter the following menus: Powertrain / Engine / DTC.

    4. 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

      Tech Tips

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


    B

    GO TO DTC CHART Click here

    A

  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OIL CONTROL VALVE FOR EXHAUST SIDE OPERATION)


    1. Connect the intelligent tester to the DLC3.

    2. Start the engine and turn the tester ON.

    3. Warm up the engine.

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

    5. Check the engine speed while operating the oil control valve using the intelligent tester.

      OK
      Tester Operation Engine Condition
      0% Normal engine speed
      100% Engine idles roughly

    NG

    INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST SIDE) 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) and turn the tester ON.

    3. Clear the DTC Click here.

    4. Start the engine and warm it up.

    5. Switch the ECM from normal mode to check mode using the intelligent tester Click here.

    6. With the engine warmed up, idle it for 1 minute. Then drive the vehicle for 5 minutes.

    7. Read the DTC using the intelligent tester.

      Result
      Result Proceed to
      DTC is not output A
      DTC P0014, P0015, P0024 or P0025 is output B

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

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


    1. A015ZBOE03

      Remove the camshaft timing oil control valve assembly for bank 1 and/or bank 2 Click here.

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

      Standard Resistance
      Tester Connections Condition Specified Conditions
      1 - 2 20°C (68°F) 6.9 to 7.9 Ω
    3. A015YNRE01

      Apply the positive battery voltage to terminal 1 and negative battery voltage to terminal 2. Check the valve operation.

      OK
      Valve moves quickly.

    4. Reinstall the camshaft timing oil control valve assembly.


    NG

    REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (BANK 1 AND/OR BANK 2) Click here

    OK

  5. INSPECT OIL CONTROL VALVE FILTER (BANK 1 AND/OR BANK 2)


    1. Remove the cylinder head cover sub-assembly Click here.

    2. Remove the camshaft timing oil control valve filter Click here.

    3. Inspect the camshaft timing oil control valve filter.

      OK
      Filter is not clogged.

    4. Reinstall the camshaft oil control valve filter Click here.

    5. Reinstall the cylinder head cover sub-assembly Click here.


    NG

    REPLACE OIL CONTROL VALVE FILTER (BANK 1 AND/OR BANK 2) Click here

    OK

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

    A015YIME02

    1. Remove the cylinder head cover bank 1 and bank 2.

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

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

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

    4. Reinstall the cylinder head covers.


    NG

    ADJUST VALVE TIMING Click here

    OK

  7. REPLACE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY (BANK 1 AND/OR BANK 2)


    1. Replace the camshaft timing exhaust gear assembly for bank 1 and/or bank 2 Click here.


    NEXT

  8. CHECK WHETHER DTC OUTPUT RECURS


    1. Connect the intelligent tester to the DLC3.

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

    3. Clear the DTC Click here.

    4. Start the engine and warm up.

    5. Switch the ECM from normal mode to check mode using the intelligent tester Click here.

    6. With the engine warmed up, idle it for 1 minute. Then drive the vehicle for 5 minutes.

    7. Read the output DTC using the intelligent tester.

      Result
      Result Proceed to
      DTC is not output A
      DTC P0014, P0015, P0024 or P0025 is output B

      Tech Tips

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


    B

    REPLACE ECM Click here

    A

    END