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P0011








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

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

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

DESCRIPTION

The Variable Valve Timing (VVT) system adjusts the intake valve timing to improve driveability. The engine oil pressure turns the VVT controller to adjust the valve timing.
The camshaft timing oil control valve assembly is a solenoid valve and switches the engine oil line. The valve moves when the ECM applies 12 V to the solenoid. The ECM changes the energizing time to the solenoid (duty-cycle) in accordance with the camshaft position, crankshaft position, throttle position, etc.









MONITOR DESCRIPTION
The ECM optimizes the intake valve timing using the Variable Valve Timing (VVT) system to control the intake camshaft. The VVT system includes the ECM, the camshaft timing oil control valve assembly and the VVT controller (camshaft timing gear assembly). The ECM sends a target duty-cycle control signal to the camshaft timing oil control valve assembly. 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 stuck malfunction and stores a DTC.
Example:
A DTC is set 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. After the above condition is met, the camshaft timing oil control valve assembly is forcibly activated 10 seconds (Condition "B").
- 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 camshaft timing oil control valve assembly malfunctions or the presence of foreign objects in the camshaft timing oil control valve assembly.
- 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 40 mph (64 km/h) for 3 minutes.
- The engine has idled for 3 minutes.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





CONFIRMATION DRIVING PATTERN





1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
2. Turn the ignition switch off.
3. Turn the ignition switch to ON and turn the Techstream on [A].
4. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [B].
5. Drive the vehicle for 5 minutes or more [C].
6. Idle the engine for 30 seconds or more [D].
7. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
8. Input the DTC: P0011 or P0012.
9. 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].

10. Drive the vehicle for 5 minutes or more [F].
11. Idle the engine for 30 seconds or more [G].
12. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
13. Input the DTC: P0011 or P0012.
14. Check the DTC judgment result again [H].
15. If the test result is UNKNOWN, enter the following menus: Powertrain / Engine / Trouble Codes / Pending.
16. Read Pending DTCs [H].
HINT: If a pending DTC is output, the system is malfunctioning.

17. 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.

MONITOR RESULT

Refer to Checking Monitor Status Mode 6 Data.

WIRING DIAGRAM





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 will remain set even if the system returns to normal after a short time. Those foreign objects may then be captured by the oil filter.
- Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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 / Trouble Codes.
(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
A -- Continue to next step.

2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY)
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Turn the Techstream on.
(d) Turn the A/C switch on.
(e) Enter the following menus: Powertrain / Engine / Active Test / Control the VVT System (Bank 1).
(f) Check the engine speed while operating the camshaft timing oil control valve assembly (for intake camshaft) using the Techstream.
Result:





HINT: If the result is not acceptable, cool the engine and perform the Active Test again.
(g) Start the engine when the engine coolant temperature is 30°C (86°F) or less.
(h) Turn the Techstream on.
(i) Turn the A/C switch on.
(j) Enter the following menus: Powertrain / Engine / Active Test / Control the VVT System (Bank 1).
(k) Check the engine speed while operating the camshaft timing oil control valve assembly (for intake camshaft) using the Techstream when the engine coolant temperature is 50°C (122°F) or less.
Result:






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) Turn the ignition switch off.
(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 the Confirmation Driving Pattern.
(i) Enter the following menus: Powertrain / Engine / Utility / All Readiness.
(j) Input the DTC: P0011 or P0012.
(k) Check the DTC judgment result.
Result:





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 will remain stored even if the system returns to normal after a short time. These foreign objects may then be captured by the oil filter.

B -- INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
A -- CHECK FOR INTERMITTENT PROBLEMS
4. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY




(a) Remove the camshaft timing oil control valve assembly (for intake camshaft).
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





Text in Illustration








(c) Connect the positive (+) battery terminal to terminal 1 and connect the negative (-) battery terminal to terminal 2. Check the valve operation.
OK:
Valve moves quickly.
(d) Reinstall the camshaft timing oil control valve assembly (for intake camshaft).

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

5. CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH)
(a) Remove the cylinder head cover Removal.





Text in Illustration





(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
OK -- Continue to next step.

6. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY
(a) Inspect the camshaft timing gear assembly Engine Unit.

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

7. 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.

Text in Illustration





(c) Reinstall the oil control valve filter Reassembly.

NG -- REPLACE OIL CONTROL VALVE FILTER
OK -- 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) Turn the ignition switch off.
(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 the Confirmation Driving Pattern.
(i) Enter the following menus: Powertrain / Engine / Utility / All Readiness.
(j) Input the DTC: P0011 or P0012.
(k) Check the DTC judgment result.
Result:





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 will remain stored even if the system returns to normal after a short time. These foreign objects may then be captured by the oil filter.

B -- REPLACE ECM
A -- CHECK FOR INTERMITTENT PROBLEMS
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