Dtc P0014 Camshaft Position B - Timing Over-Advanced Or System Performance (Bank 1)


DESCRIPTION

MONITOR DESCRIPTION

MONITOR STRATEGY

CONFIRMATION DRIVING PATTERN

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0014 OR P0015)

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

CHECK WHETHER DTC OUTPUT RECURS (DTC P0014 OR P0015)

CHECK VALVE TIMING (CHECK FOR LOOSE TEETH AND WHETHER TIMING CHAIN HAS JUMPED TOOTH)

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

INSPECT OIL CONTROL VALVE FILTER

REPLACE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY

CHECK WHETHER DTC OUTPUT RECURS (DTC P0014 OR P0015)

DTC P0014 Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 1)

DTC P0015 Camshaft Position "B" - Timing Over-Retarded (Bank 1)


DESCRIPTION

HINT:
If DTC P0014 or P0015 is output, check the VVT (Variable Valve Timing) system.
The Variable Valve Timing (VVT) system includes the ECM, camshaft timing oil control valve and camshaft timing exhaust gear. 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 camshaft timing exhaust gear. 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 camshaft timing exhaust gear 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.

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.2Tr-Fe Engine Control.Sfi System. Dtc P0014 Camshaft Position B - Timing Over-Advanced Or System Performance (Bank 1)


DTC No.
DTC Detection Condition
Trouble Area
P0014
Exhaust valve timing is not adjusted in the advance range (2 trip detection logic).
  1. Valve timing
  2. Camshaft timing oil control valve assembly (for exhaust side)
  3. Oil control valve filter
  4. Camshaft timing exhaust gear assembly
  5. ECM
P0015
Exhaust valve timing is not adjusted in the retard range (1 trip detection logic).
  1. Valve timing
  2. Camshaft timing oil control valve assembly (for exhaust side)
  3. Oil control valve filter
  4. Camshaft timing exhaust gear assembly
  5. ECM

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 camshaft timing exhaust gear.
  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 camshaft timing exhaust gear. The camshaft timing exhaust gear 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 camshaft timing exhaust gear being stuck and stores a DTC.
  3. Example:
  4. DTC P0014 is stored when the following conditions "A" and "B" are met:
    1. It takes 5 seconds or more to change the valve timing by 5°CA (Condition "A").
    2. The above condition "A" is met, for 60 seconds or more (Condition "B").
  5. DTC P0015 is stored when the following conditions "C" and "D" are met:
    1. It takes 5 seconds or more to change the valve timing by 5°CA (Condition "C").
    2. The above condition "C" is met, for 9.5 seconds or more (Condition "D").
  6. These DTCs indicate that the camshaft timing exhaust gear 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 (for exhaust side) and Camshaft timing exhaust gear assembly
Required Sensors/Components (Related)
Crankshaft position sensor, Camshaft position sensor and Engine coolant temperature sensor
Frequency of Operation
Continuous

CONFIRMATION DRIVING PATTERN


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.2Tr-Fe Engine Control.Sfi System. Dtc P0014 Camshaft Position B - Timing Over-Advanced Or System Performance (Bank 1)

  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON and turn the GTS on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).
  4. Turn the ignition switch off and wait for at least 30 seconds.
  5. Turn the ignition switch to ON 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.
    HINT:
    1. If a pending DTC is output, the system is malfunctioning.
    2. 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 or P0015.
  13. Check the DTC judgment result.

    GTS Display
    		Description
    NORMAL
    1. DTC judgment completed
    2. System normal
    ABNORMAL
    1. DTC judgment completed
    2. System abnormal
    INCOMPLETE
    1. DTC judgment not completed
    2. Perform driving pattern after confirming DTC enabling conditions
    N/A
    1. Unable to perform DTC judgment
    2. Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
    HINT:
    1. If the judgment result shows NORMAL, the system is normal.
    2. If the judgment result shows ABNORMAL, the system has a malfunction.
    3. 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.
    HINT:
    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.
    HINT:
    1. If a pending DTC is output, the system is malfunctioning.
    2. If a pending DTC is not output, perform the following procedure.
  18. Check the DTC judgment result again.
    HINT:
    1. If the judgment result shows NORMAL, the system is normal.
    2. If the judgment result shows ABNORMAL, the system has a malfunction.

WIRING DIAGRAM

Refer to DTC P0013 (LandCruiser RM000000XH70LHX_07.html).

INSPECTION PROCEDURE


HINT:

Timing Over-advanced
(Valve Timing is Out of Specified Range)
Timing Over-retarded
(Valve Timing is Out of Specified Range)
P0014
P0015
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, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
1.CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0014 OR P0015)

  1. Connect the GTS to the DLC3.

  1. Turn the ignition switch to ON and turn the GTS on.

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

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    P0014 or P0015 is output
    		A
    P0014 or P0015 and other DTCs are output
    		B
    HINT:
    If any DTCs other than P0014 or P0015 are output, troubleshoot those DTCs first.


B
GO TO DTC CHART (LandCruiser RM000000VNN00FX.html)
A


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

  1. Connect the GTS to the DLC3.

  1. Start the engine.

  1. Turn the GTS on.

  1. Warm up the engine.

  1. Turn the A/C on.

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

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

    OK:

    GTS Operation
    		Specified Condition
    0%
    		Normal engine speed
    100%
    		Engine idles roughly or stalls


NG
Go to step 4
OK


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

  1. Connect the GTS to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the GTS on.

  1. Clear the DTCs (LandCruiser RM000000VNG00DX.html).

  1. Turn the ignition switch off and wait for at least 30 seconds.

  1. Start the engine and warm it up.

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

  1. Read the output pending DTCs using the GTS.

    OK:
    No pending DTC output.


NG
Go to step 4
OK

END

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


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.2Tr-Fe Engine Control.Sfi System. Dtc P0014 Camshaft Position B - Timing Over-Advanced Or System Performance (Bank 1)

  1. Remove the cylinder head cover.

    Text in Illustration
    *a
    		Timing Mark
    *b
    		Groove
    *c
    		Approximately 13°

  1. Turn the crankshaft to align the timing marks of the crankshaft.

  1. Align the groove of the crankshaft pulley with the "0" position.

  1. Confirm whether the timing marks of the camshaft pulley and cylinder head cover are facing each other.

    HINT:
    If the timing marks are not as shown, turn the crankshaft one revolution clockwise.
    OK:
    The timing marks of the camshaft pulley and the cylinder head cover face each other when the groove of the crankshaft pulley is in the "0" position.


NG
CHECK ENGINE MECHANICAL SYSTEM (LandCruiser RM00000447K00SX.html)
OK


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

  1. Inspect the camshaft timing oil control valve assembly (for exhaust side) (LandCruiser RM000000Q74059X.html).



NG
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST SIDE) (LandCruiser RM00000111G00KX_01_0005.html)
OK


6.INSPECT OIL CONTROL VALVE FILTER

  1. Remove the oil control valve filter (LandCruiser RM00000125A066X_04_0189.html).

  1. Check that the filter is not clogged.

    OK:
    The filter is not clogged.


NG
CLEAN OR REPLACE OIL CONTROL VALVE FILTER (LandCruiser RM00000125A066X_04_0189.html)
OK


7.REPLACE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY

  1. Replace the camshaft timing exhaust gear assembly (LandCruiser RM000000YN002GX.html).

    HINT:
    Perform "Inspection After Repair" after replacing the camshaft timing exhaust gear assembly (LandCruiser RM000004NJC03XX.html).

NEXT


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

  1. Perform the Confirmation Driving Pattern.

    OK:
    No pending DTC is output and All Readiness is NORMAL.
    HINT:
    DTC P0014 or P0015 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.


NG
REPLACE ECM (LandCruiser RM000000VW203EX.html)
OK

SYSTEM IS OK