P0011

1GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0011, P0012, P0021, P0022: Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1)


DESCRIPTION

The Variable Valve Timing (VVT) system includes the ECM, Camshaft Timing Oil Control Valve (OCV) assembly and camshaft timing gear assembly. The ECM sends a target duty-cycle control signal to the OCV. This control signal regulates the oil pressure supplied to the camshaft timing gear assembly. 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 OCV, based on the signals transmitted by several sensors. The camshaft timing gear assembly regulates the intake camshaft angle using oil pressure through the OCV. 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 (OCV) assembly and camshaft timing gear assembly. The ECM sends a target duty-cycle control signal to the OCV. This control signal regulates the oil pressure supplied to the camshaft timing gear assembly. The camshaft timing gear assembly can advance or retard the intake camshaft.

- If the difference between the target and actual intake valve timings is large, and changes in the actual intake valve timing are small, the ECM interprets this as the camshaft timing gear assembly stuck malfunction and stores DTC(s).

- DTC P0011 and P0021 (Advanced Cam Timing) are subject to 1 trip detection logic.

- DTC P0012 and P0022 (Retarded Cam Timing) are subject to 2 trip detection logic.

- Example:

A DTC is stored when the following conditions 1 and 2 are met:

1. It takes 5 seconds or more to change the valve timing by 5°CA.

2. After the above condition 1 is met, the OCV is forcibly activated for 10 seconds.

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

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS

Advanced camshaft timing:





Retarded camshaft timing:





- If the difference between the target and actual camshaft timings is more than the specified value, the ECM operates the VVT actuator.

- Then, the ECM monitors the camshaft timing change for 10 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 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
- 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, P0012, P0021 or P0022.

13. Check the DTC judgment result.





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. 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
- 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 Reading and Clearing Diagnostic Trouble Codes.

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, P0012, P0021 or P0022 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 are filtered out by the oil filter.

HINT






- If DTC P0011 or P0012 is output, check the right bank VVT system for intake side circuit (for Bank 1).
- 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.
- If DTC P0021 or P0022 is output, check the left bank VVT system for intake side circuit (for Bank 2).
- Bank 2 refers to the bank that does not include the No. 1 cylinder.
- 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 ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0011, P0012, P0021 OR P0022)

(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 / Trouble Codes.

(e) Read DTCs.

Result





HINT
If any DTCs other than P0011, P0012, P0021 or P0022 are output, troubleshoot those DTCs first.

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

2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OCV FOR INTAKE SIDE)

(a) Connect the Techstream to the DLC3.

(b) Start the engine and turn the Techstream on.

(c) Warm up the engine.

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

(e) Check the engine speed while operating the OCV using the Techstream.

OK:





HINT
Refer to "Data List / Active Test" [VVT OCV Duty #1, VVT Change Angle #1, VVT OCV Duty #2 and VVT Change Angle #2] Data List / Active List.

NG -- CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TOOTH OF TIMING CHAIN)
OK -- Continue to next step.

3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011, P0012, P0021 OR P0022)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(e) Start the engine and warm it up.

(f) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

(g) Read the output pending DTCs using the Techstream.

OK:

No pending DTC output.

NG -- CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TOOTH OF TIMING CHAIN)

OK -- CHECK FOR INTERMITTENT PROBLEMS Check for Intermittent Problems

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

(a) Remove the cylinder head cover sub-assemblies RH and LH.





(b) Turn the crankshaft to align the alignment mark of the crankshaft.

(c) Align the notch of the crankshaft pulley to the "0" position.

(d) Check if the alignment marks of the camshaft pulley and camshaft bearing cap align.

Text in Illustration





(e) Turn the crankshaft clockwise 360° if the alignment marks do not align. Check if they align once again.

OK:

The alignment marks of the camshaft pulley and the camshaft bearing cap align when the notch of the crankshaft pulley is in the "0" position.

NG -- ADJUST VALVE TIMING Removal
OK -- Continue to next step.

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

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

NG -- REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE SIDE) Removal
OK -- Continue to next step.

6. INSPECT OIL CONTROL VALVE FILTER

(a) Remove the oil control valve filter Removal.

(b) Check that the filter is not clogged.

OK:

Filter is not clogged.

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

7. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY

(a) Inspect the camshaft timing gear assembly Engine Unit.

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

8. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011, P0012, P0021 OR P0022)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(e) Turn the ignition switch off and wait for at least 30 seconds.

(f) Turn the ignition switch to ON and turn the Techstream on.

(g) Start the engine and warm it up.

(h) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

(i) Read the output pending DTCs using the Techstream.

OK:

No pending DTC is output and All Readiness is NORMAL.

HINT
DTC P0011, P0012, P0021 or P0022 is output when foreign objects in engine oil are caught in some part of the system. These codes will stay output for a short time even after the system returns to normal. These foreign objects are then captured by the oil filter, thus eliminating the source of the problem.

NG -- REPLACE ECM Removal

OK -- END