SFI SYSTEM, Diagnostic DTC:P0011, P0012

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).	Valve timing Camshaft timing oil control valve assembly Oil control valve filter Camshaft timing gear assembly ECM
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 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 a VVT controller stuck malfunction and stores a DTC.

Example:

A DTC P0011 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").
The above condition "A" is met for 9.5 seconds or more (Condition "B").

A DTC P0012 is stored when the following conditions "C" and "D" are met:

It takes 5 seconds or more to change the valve timing by 5°CA (Condition "C").
The above condition "C" is met for 60 seconds or more (Condition "D").

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.

MONITOR STRATEGY

Required Sensors/Components (Main)

Camshaft timing oil control valve assembly

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 intelligent tester to the DLC3.
Turn the ignition switch to ON and turn the tester on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON and turn the tester on [A].
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [B].
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.
Idle the engine for 3 minutes or more [D].
Enter the following menus: Powertrain / Engine and ECT / DTC [E].
Read the pending DTCs.
Tech Tips
- 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.

Tester Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

Tech Tips

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].

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.

Tech Tips

Depress the accelerator pedal by a large amount.
Idle the engine for 3 minutes or more [G].
Enter the following menus: Powertrain / Engine and ECT / DTC [H].
Read the pending DTCs.
Tech Tips
- 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.
Tech Tips
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.

WIRING DIAGRAM

Refer to DTC P0010 Click here.

INSPECTION PROCEDURE

Tech Tips

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 intelligent tester. 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 intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the tester on.
Enter the following menus: Powertrain / Engine and ECT / DTC.

Read the DTCs.

Result
Result	Proceed to
DTC P0011 or P0012 is output	A
DTC P0011 or P0012 and other DTCs are output	B

Tech Tips

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

GO TO DTC CHART Click here

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE VVT LINEAR)

Connect the intelligent tester to the DLC3.
Start the engine.
Turn the tester on.
Turn the A/C switch on.
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 tester.

OK
Tester Operation	Specified Condition
0%	Normal engine speed
100%	Engine idles roughly or stalls

Tech Tips

Refer to "Data List / Active Test" [VVT OCV Duty #1 and VVT Change Angle #1] Click here.

CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH) Click here

CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012)

Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the tester on.
Clear the DTCs Click here.
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON.
Turn the tester on.
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 / DTC / Pending.

Read the pending DTCs.

Result
Result	Proceed to
DTC is not output	A
DTC P0011 or P0012 is output	B

Tech Tips

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 VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH) Click here

CHECK FOR INTERMITTENT PROBLEMS Click here

CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH)

Text in Illustration
*1	Timing Mark
*2	Front Mark
*3	Groove

Remove the cylinder head cover sub-assembly.
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 aligned with the front marks located on the No. 1 and No. 2 bearing caps as shown in the illustration.

Tech Tips

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
1. Inspect the camshaft timing oil control valve assembly Click here.
NG
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Click here

OK
INSPECT OIL CONTROL VALVE FILTER
1. Text in Illustration
  
  *1 Oil Control Valve Filter
  
  Remove the oil control valve filter Click here.
2. Check that the oil control valve filter is not clogged.
  
  OK
  
  Oil control valve filter is not clogged.
NG
REPLACE OIL CONTROL VALVE FILTER Click here

OK
REPLACE CAMSHAFT TIMING GEAR ASSEMBLY
1. Replace the camshaft timing gear assembly Click here.
NEXT

Text in Illustration
*1	Oil Control Valve Filter

OK
Oil control valve filter is not clogged.

CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012)

Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the tester on.
Clear the DTCs Click here.
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON.
Turn the tester on.
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 / DTC / Pending.

Read the pending DTCs.

Result
Result	Proceed to
DTC is not output	A
DTC P0011 or P0012 is output	B

REPLACE ECM Click here

END