DTC Code | DTC Name |
---|---|
P0011 | Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1) |
P0012 | Camshaft Position "A" - Timing Over-Retarded (Bank 1) |
DESCRIPTION
Refer to DTC P0010 (Click here).
DTC No. | DTC Detection Condition | Trouble Area |
---|---|---|
P0011 | Intake valve timing is stuck at a certain value when in the advance range (1 trip detection logic). |
|
P0012 | Intake valve timing is stuck at a certain value when in the retard range (2 trip detection logic). |
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 (for intake camshaft) 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 (for intake camshaft). 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 a VVT controller stuck malfunction and stores a DTC.
Example:
A DTC is stored when the following conditions "A" and "B" are met:
It takes 5 seconds or more to change the valve timing by 5°CA (Condition "A").
After the above condition is met, the camshaft timing oil control valve assembly (for intake camshaft) is forcibly activated for 60 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 a camshaft timing oil control valve assembly malfunction or the presence of foreign objects in the camshaft timing oil control valve assembly (for intake camshaft).
MONITOR STRATEGY
Required Sensors/Components (Main) | Camshaft timing oil control valve assembly (for intake camshaft) Camshaft timing gear assembly |
Required Sensors/Components (Related) | Crankshaft position sensor Camshaft position sensor Engine coolant temperature sensor |
Frequency of Operation | Continuous |
CONFIRMATION DRIVING PATTERN
Connect the GTS to the DLC3.
Turn the power switch on (IG) and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
P0011 is output:
Clear the DTC without using the GTS.
P0012 is output:
Clear the DTC with using the GTS.
Turn the power switch off and wait for at least 30 seconds.
Turn the power switch on (IG) and turn the GTS on [A].
Put the engine in inspection mode (maintenance mode) (Click here).
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [B].
Accelerate the vehicle to 60 km/h (37 mph) or more by depressing the accelerator pedal for 10 seconds or more [C].
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
If the engine stops, further depress the accelerator pedal to restart the engine.
Idle the engine for 100 seconds or more [D].
P0011 is output:
With the shift lever in P.
P0012 is output:
With the shift lever in D.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [E].
Read the pending DTCs.
If a pending DTC is output, the system is malfunctioning.
If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
Input the DTC: P0011 or P0012.
Check the DTC judgment result.
GTS Display | Description |
---|---|
NORMAL |
|
ABNORMAL |
|
INCOMPLETE |
|
N/A |
|
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 N/A, perform steps [F] through [H].
Accelerate the vehicle to 60 km/h (37 mph) or more by depressing the accelerator pedal for 10 seconds or more [F].
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Idle the engine for 100 seconds or more [G].
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [H].
Read the pending DTCs.
If a pending DTC is output, the system is malfunctioning.
If a pending DTC is not output, perform the following procedure.
Check the DTC judgment result again.
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 N/A, perform steps [F] through [H] 10 to 20 times.
CAUTION / NOTICE / 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. Those foreign objects may then be captured by the oil filter.
Read freeze frame data using the GTS. 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
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0011 OR P0012)
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read the DTCs.
Result | Proceed to |
---|---|
DTC P0011 or P0012 is output | A |
DTC P0011 or P0012 and other DTCs are output | B |
If any DTCs other than P0011 or P0012 are output, troubleshoot those DTCs first.
GO TO DTC CHART (Click here)
PERFORM ACTIVE TEST USING GTS (CONTROL THE VVT LINEAR)
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Put the engine in inspection mode (maintenance mode) (Click here).
Start the engine.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Linear (Bank 1).
Check the engine speed while operating the camshaft timing oil control valve assembly using the GTS.
GTS Operation | Specified Condition |
---|---|
0% | Normal engine speed |
100% | Engine idles roughly or stalls |
Refer to "Data List / Active Test" [VVT OCV Duty #1 and VVT Change Angle #1] (Click here).
If the result is not acceptable, cool the engine (engine coolant temperature is 50°C (122°F) or less) and perform the Active Test again.
Test not possible with the shift lever in P during charge control. Move the shift lever to N to perform test.
If the DTCs are stored after the Active Test, clear the DTCs (Click here).
CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012)
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Clear the DTCs (Click here).
P0011 is output:
Clear the DTC without using the GTS.
P0012 is output:
Clear the DTC with using the GTS.
Turn the power switch off and wait for at least 30 seconds.
Turn the power switch on (IG).
Turn the GTS on.
Put the engine in inspection mode (maintenance mode) (Click here).
Start the engine and warm it up.
Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
Read the pending DTCs.
Result | Proceed to |
---|---|
DTC is not output | A |
DTC P0011 or P0012 is output | B |
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.
CHECK FOR INTERMITTENT PROBLEMS (Click here)
CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH)
*1 | Timing Mark | - | - |
Remove the cylinder head cover sub-assembly (Click here).
Turn the crankshaft pulley and align its groove with the "0" timing mark of the timing chain cover.
Check that the timing marks of the camshaft timing gear assembly and camshaft timing sprocket are at the positions shown in the illustration.
If the timing marks are not as shown, turn the crankshaft one revolution clockwise.
OK |
---|
Timing marks on camshaft timing gear assembly and camshaft timing sprocket are aligned as shown in the illustration. |
ADJUST VALVE TIMING (Click here)
INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
Inspect the camshaft timing oil control valve assembly (Click here).
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (Click here)
INSPECT OIL CONTROL VALVE FILTER
Remove the oil control valve filter (Click here).
Check that the oil control valve filter is not clogged.
OK |
---|
Oil control valve filter is not clogged. |
REPLACE OIL CONTROL VALVE FILTER (Click here)
REPLACE CAMSHAFT TIMING GEAR ASSEMBLY
Replace the camshaft timing gear assembly (Click here).
Perform "Inspection After Repair" after replacing the camshaft timing gear assembly (Click here).
CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012)
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Clear the DTCs (Click here).
P0011 is output:
Clear the DTC without using the GTS.
P0012 is output:
Clear the DTC with using the GTS.
Turn the power switch off and wait for at least 30 seconds.
Turn the power switch on (IG).
Turn the GTS on.
Put the engine in inspection mode (maintenance mode) (Click here).
Start the engine and warm it up.
Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
Read the pending DTCs.
Result | Proceed to |
---|---|
DTC is not output | A |
DTC P0011 or P0012 is output | B |
END
REPLACE ECM (Click here)