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.

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DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P0011	Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1)	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 (for intake camshaft) Camshaft timing gear assembly ECM	Comes on	DTC stored
P0012	Camshaft Position "A" - Timing Over-Retarded (Bank 1)	Intake valve timing is stuck at a certain value when in the retard range (2 trip detection logic).	Valve timing Camshaft timing oil control valve assembly (for intake camshaft) Camshaft timing gear assembly ECM	Comes on	DTC stored

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 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 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 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 "A" is met, the camshaft timing oil control valve assembly is forcibly activated 10 times or more for the advanced camshaft timing (when the vehicle is idling, this takes approximately 9.5 seconds) (Condition "B").
After the above condition "A" is met, the camshaft timing oil control valve assembly is forcibly activated 63 times or more for the retarded camshaft timing (when the vehicle is idling, this takes approximately 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 camshaft timing oil control valve assembly malfunctions or the presence of foreign objects in the camshaft timing oil control valve assembly.

CONFIRMATION DRIVING PATTERN

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS 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.
Turn the GTS 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 / Trouble Codes [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.

GTS 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 / Trouble Codes [H].
Read 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.
- If the judgment result shows INCOMPLETE or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.

WIRING DIAGRAM

Refer to DTC P0010.

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CAUTION / NOTICE / HINT

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 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 ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Powertrain > Engine and ECT > Trouble Codes

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 GTS (CONTROL THE VVT LINEAR BANK 1)

Connect the GTS to the DLC3.
Start the engine.
Turn the GTS on.
Turn the A/C switch on.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Linear (Bank 1).

Powertrain > Engine and ECT > Active Test

Tester Display

Control the VVT Linear (Bank1)

Tester Display
Control the VVT Linear (Bank1)

Check the engine speed while operating the camshaft timing oil control valve assembly (for intake camshaft) using the GTS.

GTS 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].

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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.

Result

Proceed to
OK
NG

INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) Click here

CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON.
Turn the GTS 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 / Trouble Codes.

Powertrain > Engine and ECT > Trouble Codes

Read the 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 FOR INTERMITTENT PROBLEMS Click here

INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT)

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

Click here

Result

Proceed to
OK
NG

REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) Click here

INSPECT CAMSHAFT TIMING GEAR ASSEMBLY

Inspect the camshaft timing gear assembly.

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Tech Tips

Perform "Inspection After Repair" after replacing the camshaft timing gear assembly.

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Result

Proceed to
OK
NG

REPLACE CAMSHAFT TIMING GEAR ASSEMBLY Click here

CHECK ENGINE MECHANICAL SYSTEM

Check for mechanical malfunctions that affect the valve timing, such as a jumped tooth or stretching of the timing chain.

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Result

Proceed to
OK
NG

REPAIR OR REPLACE MALFUNCTION PARTS, COMPONENT AND AREA

CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON.
Turn the GTS 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 / Trouble Codes.

Powertrain > Engine and ECT > Trouble Codes

Read the the DTCs.

Result

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

Tech Tips

CHECK FOR INTERMITTENT PROBLEMS Click here

REPLACE ECM Click here