P0011

2TR-FE ENGINE CONTROL: SFI SYSTEM: P0011,P0012: Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1)

DESCRIPTION

HINT
If DTC P0011 or P0012 is output, check the Variable Valve Timing (VVT) system.

The VVT system includes the ECM, oil control valve and VVT controller. The ECM sends a target duty cycle control signal to the camshaft timing oil control valve assembly. This control signal regulates the oil pressure applied 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 assembly based on the signals transmitted by several sensors. The VVT controller regulates the intake camshaft angle using oil pressure through the camshaft timing oil control valve assembly. 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 intake valve timing using signals from the camshaft and crankshaft position sensors and performs feedback control. This is how the target intake valve timing is verified by the ECM.

MONITOR DESCRIPTION

The ECM optimizes the intake valve timing using the VVT (Variable Valve Timing) system to control the intake camshaft. The 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. The VVT controller can advance or retard the intake camshaft.

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

DTC P0011 (Advanced Cam Timing) is subject to 1 trip detection logic.

DTC P0012 (Retarded Cam Timing) is subject to 2 trip detection logic.

These DTCs indicate that the VVT controller cannot operate properly due to OCV malfunctions or the presence of foreign objects in the OCV.

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

- The engine is warm (the engine coolant temperature is 70°C [158°F] or higher).

- The vehicle has been driven at more than 64 km/h (40 mph) for 3 minutes.

- The engine has idled for 3 minutes.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

If the difference between the target and actual camshaft timing is more than the specified value, the ECM operates the VVT (Variable Valve Timing) actuator. Then, the ECM monitors the camshaft timing change for 5 seconds.

MONITOR RESULT

Refer to Checking Monitor Status Mode 6 Data.

CONFIRMATION DRIVING PATTERN

1. Connect the Techstream to the DLC3.

2. Turn the ignition switch to ON and turn the Techstream 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 Techstream 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 for 5 minutes or more [C].

8. Idle the engine for 30 seconds or more [D].

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

10. Read the pending DTC.

HINT
- 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: P0011 or P0012.

13. Check the DTC judgment result.

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

HINT
- 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 UNKNOWN, perform steps [F] through [H].

14. Drive the vehicle for 5 minutes or more [F].

15. Idle the engine for 30 seconds or more [G].

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

17. Read the pending DTC.

HINT
- 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.

HINT
- 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 UNKNOWN, perform the following procedure.

19. Perform a universal trip and check for permanent DTCs DTC Check / Clear.

HINT
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

Refer to DTC P0010 P0010.

INSPECTION PROCEDURE

HINT
- DTC P0011 or P0012 may be stored when foreign objects in the engine oil are caught in some parts of the system. The DTC remains stored for a short time even after the system returns to normal. These foreign objects may then be captured by the oil filter.
- Read freeze frame data using the Techstream. 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 P0011 OR P0012)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine and ECT / DTC.

(e) Read the DTCs.

Result

HINT
If any DTCs other than P0011 or P0012 are output, troubleshoot those DTCs first.

B -- GO TO DTC CHART Engine Control System - SFI System
A -- Continue to next step.

2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE)

(a) Connect the Techstream to the DLC3.

(b) Start the engine.

(c) Turn the Techstream on.

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

(e) Check the engine speed when the camshaft timing oil control valve is operated using the Techstream when the engine coolant temperature is 50°C (122°F) or less.

HINT
- When performing the Active Test, make sure the air conditioning is on.
- Make sure the engine coolant temperature when the engine is started is 30°C (86°F) or less.

OK:

NG -- INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
OK -- Continue to next step.

3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear the DTCs DTC Check / Clear.

(e) Start the engine and warm it up.

(f) Switch the ECM from normal mode to check mode using the Techstream Scan Tool Testing and Procedures.

(g) Allow the engine to idle for more than 1 minute.

(h) Drive the vehicle for more than 10 minutes.

(i) Enter the following menus: Powertrain / Engine and ECT / DTC.

(j) Read the DTCs.

Result

HINT
DTC P0011 or P0012 is stored when foreign objects in the engine oil are caught in some parts of the system. These codes remain stored for a short time even after the system returns to normal. These foreign objects may then be captured by the oil control valve filter, thus eliminating the source of the problem.

B -- ADJUST VALVE TIMING

A -- CHECK FOR INTERMITTENT PROBLEMS Check for Intermittent Problems

4. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

(a) Inspect the camshaft timing oil control valve assembly Inspection.

(b) Connect the positive (+) battery terminal to terminal 1 and the negative (-) battery terminal to terminal 2. Check the valve operation.

OK:

Valve moves quickly.

(c) Reinstall the camshaft timing oil control valve assembly.

NG -- REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Removal
OK -- Continue to next step.

5. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY

(a) Inspect the camshaft timing gear assembly Removal.

NG -- REPLACE CAMSHAFT TIMING GEAR ASSEMBLY Removal
OK -- Continue to next step.

6. INSPECT OIL CONTROL VALVE FILTER

(a) Remove the oil control valve filter.

(b) Check that the filter is not clogged.

OK:

Filter is not clogged.

(c) Reinstall the oil control valve filter.

NG -- REPLACE OIL CONTROL VALVE FILTER
OK -- Continue to next step.

7. ADJUST VALVE TIMING

HINT
There are no marks on the cylinder head to align for the purpose of checking valve timing. Valve timing can only be inspected by aligning the colored plates on the timing chain with the marks on the pulleys. It may be necessary to remove and reinstall the chain to align the timing marks Installation.

NEXT -- Continue to next step.

8. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear the DTCs DTC Check / Clear.

(e) Start the engine and warm it up.

(f) Switch the ECM from normal mode to check mode using the Techstream Scan Tool Testing and Procedures.

(g) Allow the engine to idle for more than 1 minute.

(h) Drive the vehicle for more than 10 minutes.

(i) Enter the following menus: Powertrain / Engine and ECT / DTC.

(j) Read the DTCs.

Result