DTC    P0011    Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1)

DTC    P0012    Camshaft Position "A" - Timing Over-Retarded (Bank 1)

DTC    P0021    Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 2)

DTC    P0022    Camshaft Position "A" - Timing Over-Retarded (Bank 2)

for Preparation Click here


DESCRIPTION

The Variable Valve Timing (VVT) system controls the intake camshaft to provide the optimal valve timing for every driving condition. This control is performed based on signals regarding as intake air volume, throttle position and engine coolant temperature.
The ECM controls the Oil Control Valve (OCV), based on the signals output from several sensors. The VVT controller regulates the intake camshaft angle using oil pressure through the OCV. As a result, the relative position between the camshaft and the crankshaft becomes optimal, and the engine torque improves, and fuel economy improves, and exhaust emissions decrease under overall driving conditions. Also, the ECM detects the actual valve timing using the signals from the camshaft position sensor and the crankshaft position sensor, and performs feedback control. This is how target valve timing is achieved by the ECM.

A103843E06


DTC No.
DTC Detection Condition
Trouble Area
P0011
P0021
  1. Advanced cam timing:
    After engine is warmed up and engine speed is at 400 to 4,000 rpm, condition (a) or (b) continues (1 trip detection logic):
    1. (a) Valve timing does not change from current valve timing
    2. (b) Current valve timing is fixed (difference between "target" and "actual" camshaft timing is more than 5° crankshaft angle for 4.5 seconds and camshaft timing change is less than 5° crankshaft angle for 5 seconds)
  1. VVT actuator
  2. Valve timing
  3. VVT OCV
  4. ECM
P0012
P0022
  1. Retarded cam timing:
    After engine is warmed up and engine speed is at 400 to 4,000 rpm, condition (a) or (b) continues (2 trip detection logic):
    1. (a) Valve timing does not change from current valve timing
    2. (b) Current valve timing is fixed (difference between "target" and "actual" camshaft timing is more than 5° crankshaft angle for 4.5 seconds and camshaft timing change is less than 5° crankshaft angle for 5 seconds)
  1. VVT actuator
  2. Valve timing
  3. VVT OCV
  4. ECM

MONITOR DESCRIPTION

The ECM optimizes the valve timing using the VVT system to control the intake valve camshaft. The VVT system includes the ECM, the OCV and the VVT actuator. The ECM sends a target "duty-cycle" control signal to the OCV. This control signal, applied to the OCV, regulates the oil pressure supplied to the VVT controller. The VVT controller can advance or retard the intake valve camshaft.
Example:
A DTC will set if: 1) the difference between the target and actual valve timing is more than 5 degrees of the crankshaft angle and the condition continues for more than 4.5 seconds; or 2) the OCV is forcibly activated 63 times or more.
Advanced cam DTCs are subject to 1 trip detection logic.
Retarded cam DTCs are subject to 2 trip detection logic.
The monitor runs if all the conditions below are met:
  1. After engine warm-up (engine coolant temperature is 75°C (167°F) or more).
  2. After driving the vehicle over 40 km/h (25 mph) for 3 minutes.
  3. After idling the engine for 3 minutes.

WIRING DIAGRAM


A088003E07


INSPECTION PROCEDURE

HINT:
  1. Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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.
  2. If DTC P0011 or P0012 is displayed, check the bank 1 VVT system circuit.
  3. If DTC P0021 or P0022 is displayed, check the bank 2 VVT system circuit.
  4. Bank 1 includes cylinder No. 1, but bank 2 does not. Cylinder No. 1 is located in the front part of the engine, opposite the transmission.

NOTICE:
DTCs P0011, P0012, P0021 or P0022 is output when a foreign object in the engine oil enters the system. These codes will stay set even if the system returns to normal after a short time. Foreign objects are filtered out by the oil filter.

1.PERFORM ACTIVE TEST (OCV OPERATION)

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine and warm it up.

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

  1. Using the intelligent tester, operate the OCV and check the engine speed.

    OK:
    Tester Operation
    		Specified Condition
    OCV is OFF
    		Normal engine speed
    OCV is ON
    		Rough idle or engine stall



NG
Go to step 4
OK


2.PERFORM ACTIVE TEST (OCV OPERATION)

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

  1. Change the VVT B1 and VVT B2 values to a value between -100% to 100%.

    HINT:
    VVT B1 and VVT B2 values should be added to the current OCV duty ratio.

  1. Confirm the current VVT angle by checking VVT CHNG ANGL#1 and VVT CHNG ANGL#2.

    OK:
    Operation of VVT B1 or VVT B2 leads to an immediate, linear change in the VVT angle.

NOTICE:
  1. With the engine idling and with the advanced camshaft timing (VVT B1 or VVT B2 has a value of 0% to 100%), engine revolutions will be rough or the engine will stall.
  2. When the vehicle is being driven, if the engine is turned off or the throttle valve is open, this Active Test will automatically be canceled.



NG
Go to step 4
OK


3.CHECK IF DTC OUTPUT REOCCURS

  1. Select check mode.

  1. Start and warm up the engine.

  1. Drive the vehicle for 10 minutes or more.

  1. Read the DTC.

    OK:
    No DTC is output.



OK
END
NG


4.CHECK VALVE TIMING
A088858E11

  1. Remove the engine cover.

  1. Remove the drive belt.

  1. Remove the timing belt cover LH and RH.

  1. Turn the crankshaft to align the matchmarks of the crankshaft.

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

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

  1. If the matchmarks are not facing each other, turn the crankshaft clockwise by 360°. Confirm again if the matchmarks are facing each other.

    OK:
    The matchmarks of the camshaft pulley and the cylinder head cover face each other when the notch of the crankshaft pulley is in the "0" position.



NG
ADJUST VALVE TIMING
OK


5.INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
A088857E05

  1. Measure the resistance of the OCV.

    Standard resistance:
    6.9 to 7.9 Ω at 20°C (68°F)

  1. Remove the OCV.

  1. Apply battery voltage to the terminals of the OCV.

  1. Check the valve operation.

    OK:
    The valve moves quickly.



NG
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
OK


6.INSPECT OIL CONTROL VALVE FILTER
A086178E01

  1. Remove the cylinder head cover.

  1. Remove the camshaft bearing cap and OCV filter.

  1. Check that the filter is not clogged.

    OK:
    The filter is not clogged.



NG
CLEAN OIL CONTROL VALVE FILTER
OK


7.REPLACE CAMSHAFT TIMING GEAR ASSEMBLY

  1. After replacing the camshaft timing gear, check the DTC.

  1. Clear the DTC and select check mode (Click here).

  1. Start and warm up the engine.

  1. Drive the vehicle for 10 minutes or more.

  1. Check that no DTC is output.


NEXT

END