2UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0011,P0012,P0021,P0022; Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1); 2006 MY LX470 [05/2005

Last Modified: 4-30-2014	6.6 C	Doc ID: RM000000TSG00BX
Model Year: 2006	Model: LX470	Prod Date Range: [05/2005 - ]
Title: 2UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0011,P0012,P0021,P0022; Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1); 2006 MY LX470 [05/2005 - ]

DTC

P0011

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

DTC

P0012

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

DTC

P0021

Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 2)

DTC

P0022

Camshaft Position "A" - Timing Over-Retarded (Bank 2)

DESCRIPTION

HINT:

Refer to DTC P0011, P0012, P0021 and P0022 is present, check the Variable Valve Timing (VVT) system.
Refer to DTC P0010 .

DTC No.

DTC Detection Condition

Trouble Area

P0011

P0021

Advanced cam timing:
After engine is warmed up and engine speed is at 400 to 4,000 rpm, condition (a) or (b) continues (1 trip detection logic):
- (a) Valve timing does not change from current valve timing
- (b) Current valve timing is fixed (difference between "target" and "actual" camshaft timing is more than 5° CA for 4.5 seconds and camshaft timing change is less than 5° CA for 5 seconds)

Oil Control Valve (OCV)
Valve timing
OCV filter
Camshaft timing tube assembly
ECM

P0012

P0022

Retarded cam timing:
After engine is warmed up and engine speed is at 400 to 4,000 rpm, condition (a) or (b) continues (2 trip detection logic):
- (a) Valve timing does not change from current valve timing
- (b) Current valve timing is fixed (difference between "target" and "actual" camshaft timing is more than 5° CA for 4.5 seconds and camshaft timing change is less than 5° CA for 5 seconds)

OCV
Valve timing
OCV filter
Camshaft timing tube assembly
ECM

MONITOR DESCRIPTION

The ECM optimizes the valve timing using the Variable Valve Timing (VVT) system to control the intake valve camshaft. The VVT system includes the ECM, the OCV and the VVT actuator. The ECM sends a target "duty-cycle" control signal to the OCV. This control signal, applied to the OCV, regulates the oil pressure supplied to the VVT controller. The VVT controller can advance or retard the intake valve camshaft.

Example:

A DTC will set if: 1) the difference between the target and actual valve timing is more than 5° of the Crankshaft Angle (CA) and the condition continues for more than 4.5 seconds; or 2) the OCV is forcibly activated 63 times or more.

Advanced cam DTCs are subject to 1 trip detection logic.

Retarded cam DTCs are subject to 2 trip detection logic.

The monitor runs if all the conditions below are met:

After engine warm-up (engine coolant temperature is 75°C (167°F) or more).
After driving the vehicle over 40 km/h (25 mph) for 3 minutes.
After idling the engine for 3 minutes.

MONITOR STRATEGY

Related DTCs	P0011: Advance camshaft timing (bank 1) P0012: Retard camshaft timing (bank 1) P0021: Advance camshaft timing (bank 2) P0022: Retard camshaft timing (bank 2)
Required Sensors/Components (Main)	OCV and VVT actuator
Required Sensors/Components (Related)	Engine Coolant Temperature sensor, Camshaft position sensor, Crankshaft position sensor
Frequency of Operation	Once per driving cycle
Duration	10 seconds
MIL Operation	P0011 and P0021: Immediate P0012 and P0022: 2 driving cycles
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

Monitor will run whenever these DTCs are not present	P0100 - P0103 (MAF sensor) P0115 - P0118 (ECT sensor) P0125 (Insufficient ECT for closed loop) P0335 (CKP sensor) P0340, P0341 (CMP sensor) P0351 - P0358 (igniter)
Battery voltage	11 V or more
Engine RPM	400 to 4,000 rpm
ECT	75 to 100°C (167 to 212°F)

TYPICAL MALFUNCTION THRESHOLDS

Advance:

Both of the following conditions are met	-
(a) Deviation of valve timing	More than 5° CA (crankshaft angle)
(b) Valve timing	No change at advanced valve timing

Retarded:

Both of the following conditions are met	-
(a) Deviation of valve timing	More than 5° CA (crankshaft angle)
(b) Valve timing	No change at retarded valve timing

If the difference between target and actual camshaft timing is larger than the specified value, the ECM operates the VVT actuator.

Then, the ECM monitors the camshaft timing change for 5 seconds.

WIRING DIAGRAM

Refer to DTC P0010 .

INSPECTION PROCEDURE

Abnormal bank

Advanced timing over

(Valve timing is out of specified range)

Retarded timing over

(Valve timing is out of specified range)

Bank 1

P0011

P0012

Bank 2

P0021

P0022

If DTC P0011 or P0012 is displayed, check the bank 1 Variable Valve Timing (VVT) system circuit.
If DTC P0021 or P0022 is displayed, check the bank 2 VVT system circuit.
Bank 1 includes No. 1 cylinder, but bank 2 does not. No. 1 cylinder is located in the front part of the engine, opposite the transmission.
Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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.

NOTICE:

DTC P0011, P0012, P0021 or P0022 is also output when a foreign object is detected in some parts of the system in the engine oil, and then the system returns to normal in a short time. As the ECM is controlled to eject a foreign object, there is no problem with the VVT. There is also no problem with the VVT as the oil filter should catch the foreign object in the engine oil.

PROCEDURE

1.	PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OCV OPERATION)

(a) Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.

(b) Start the engine and warm it up.

(d) Using the intelligent tester, operate the Oil Control Valve (OCV) and check the engine speed.

Standard:

Tester Operation	Specified Condition
OCV is OFF	Normal engine speed
OCV is ON	Rough idle or engine stall

GO TO STEP 4

2.	PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OCV OPERATION)

(a) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VVT B1 or VVT B2.

(b) Change the VVT B1 and VVT B2 values to a value between -100% to 100%.

HINT:

VVT B1 and VVT B2 values should be added to the current OCV duty ratio.

OK:

Operation of VVT B1 or VVT B2 leads to an immediate, linear change in the VVT angle.

NOTICE:

With the engine idling and with the advanced camshaft timing (VVT B1 or VVT B2 has a value of 0% to 100%), engine revolutions will be rough or the engine will stall.
When the vehicle is being driven, if the engine is turned off or the throttle valve is open, this ACTIVE TEST will automatically be canceled.

GO TO STEP 4

3.	CHECK IF DTC OUTPUT REOCCUR (DTC P0011, P0012, P0021 OR P0022)

(a) Select check mode .

(b) Start and warm up the engine.

(d) Read the DTC.

OK:

No DTC is output.

END

4.	CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TOOTH OF TIMING BELT)

(a) Remove the engine cover .

(b) Remove the drive belt .

(d) Turn the crankshaft to align the matchmarks of the crankshaft.

(e) Align the notch of the crankshaft pulley with the "0" position.

(f) Confirm whether the matchmarks of the camshaft pulley and cylinder head cover are facing each other.

(g) If the matchmarks are not facing each other, turn the crankshaft clockwise by 360°. Confirm again if the matchmarks are facing each other.

OK:

The matchmarks of the camshaft pulley and the cylinder head cover face each other when the notch of the crankshaft pulley is in the "0" position.

ADJUST VALVE TIMING

5.	INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

(a) Disconnect the C40 or C41 Oil Control Valve (OCV) connector.

(b) Measure the resistance of the OCV.

Standard resistance:

6.9 to 7.9 Ω at 20°C (68°F)

(d) Apply battery voltage to the terminals of the OCV.

(e) Check the valve operation.

OK:

The valve moves quickly.

REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

6.	INSPECT OIL CONTROL VALVE FILTER

(a) Remove the cylinder head cover .

(b) Remove the camshaft bearing cap and OCV filter.

OK:

The filter is not clogged.

CLEAN OIL CONTROL VALVE FILTER

7.	REPLACE CAMSHAFT TIMING TUBE ASSEMBLY

(a) After replacing camshaft timing tube assembly, confirm that the DTC output does not recur.

(b) Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.

(d) Clear the DTCs .

(e) Start and warm up the engine.

(f) Switch the ECM from normal mode to check mode using the tester .

(g) Drive the vehicle for 10 minutes or more.

(h) Confirm that no DTC is set using the tester.

END