P0011
2AR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0011,P0012: Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1)
DESCRIPTION
Refer to DTC P0010 P0010.
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, the camshaft timing Oil Control Valve (OCV) and the VVT controller (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 VVT controller. The VVT controller 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 VVT controller stuck malfunction and stores a DTC.
- Example:
- A DTC is stored when both of the following conditions are met for 10 seconds or more:
* 1. The difference between the target and actual intake 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.
- 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 run if all of the following conditions are met:
* The engine is warm (the engine coolant temperature is 75°C [167°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 timings is more than the specified value, the ECM operates the VVT actuator. Then, the ECM monitors the camshaft timing change for 5 seconds.
CONFIRMATION DRIVING PATTERN
1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation) [A].
2. Start the engine and warm it up until the ECT reaches 75°C (167°F) or higher [B].
3. Drive the vehicle for 5 minutes or more [C].
4. Idle the engine for 30 seconds or more [D].
5. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
6. Input the DTC: P0011 or P0012.
7. Check the DTC judgment result [E].
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or UNKNOWN, perform steps [F] through [H].
8. Drive the vehicle for 5 minutes or more [F].
9. Idle the engine for 30 seconds or more [G].
10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
11. Input the DTC: P0011 or P0012.
12. Check the DTC judgment result again [H].
13. If the test result is UNKNOWN, enter the following menus: Powertrain / Engine and ECT / Trouble Code / Pending.
14. Read Pending DTCs [H].
HINT
If a pending DTC is output, the system is malfunctioning.
15. If the test result is INCOMPLETE or UNKNOWN and no pending DTC is output, 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 even if the system returns to normal after a short time. Foreign objects are filtered out 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 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 / Trouble Codes.
(e) Read 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 OCV)
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Turn the Techstream on.
(d) Warm up the engine.
(e) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1).
(f) Check the engine speed while operating the camshaft timing Oil Control Valve (OCV) using the Techstream.
OK:
NG -- CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH)
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 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 Check Mode Procedure.
(g) Drive the vehicle in accordance with the driving pattern described in the CONFIRMATION DRIVING PATTERN.
(h) Read DTCs.
Result
B -- CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH)
A -- CHECK FOR INTERMITTENT PROBLEMS Check for Intermittent Problems
4. CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH)
(a) Remove the cylinder head cover Removal.
(b) Turn the crankshaft pulley, and align its groove with the timing mark "0" of the timing chain cover.
(c) Check that the timing marks of the camshaft timing gears are aligned with the timing marks as shown in the illustration.
OK:
Timing marks on camshaft timing gears are aligned as shown in the illustration.
(d) Reinstall the cylinder head cover Installation.
NG -- ADJUST VALVE TIMING Installation
OK -- Continue to next step.
5. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
(a) Remove the camshaft timing oil control valve assembly Removal.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(c) Apply positive battery voltage to terminal 1 and negative battery voltage to terminal 2. Check the valve operation.
OK:
Valve moves quickly.
(d) Reinstall the camshaft timing oil control valve assembly Installation.
NG -- REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Removal
OK -- Continue to next step.
6. INSPECT OIL CONTROL VALVE FILTER
(a) Remove the oil control valve filter Disassembly.
(b) Check that the filter is not clogged.
OK:
Filter is not clogged.
(c) Reinstall the oil control valve filter Reassembly.
NG -- CLEAN OIL CONTROL VALVE FILTER
OK -- Continue to next step.
7. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY
(a) Replace the camshaft timing gear assembly Removal.
NEXT -- Continue to next step.
8. CHECK WHETHER DTC OUTPUT RECURS
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear 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 Check Mode Procedure.
(g) Drive the vehicle in accordance with the driving pattern described in the CONFIRMATION DRIVING PATTERN.
(h) Read 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 are then captured by the oil filter, thus eliminating the source of the problem.
B -- REPLACE ECM Removal
A -- END