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DI-76
DIAGNOSTICS - ENGINE (1GR-FE)
DIDT5-01

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)

CIRCUIT DESCRIPTION
Refer to DTCs P0010 on page DI-70.
DTC No. DTC Detecting Condition Trouble Area
Advanced cam timing:
P0011 After engine is warmed up and engine speed is at 400 to
P0021 4,000 rpm, condition (a) continues. (1 trip detection logic) S Valve timing
(a) Valve timing does not change from current valve timing S OCV
Retarded cam timing: S VVT controller assembly
P0012 After engine is warmed up and engine speed is at 400 to S ECM
P0022 4,000 rpm, condition (a) continues. (2 trip detection logic)
(a) Valve timing does not change from current valve timing

MONITOR DESCRIPTION
The ECM optimizes the valve timing using the VVT (Variable Valve Timing) system to control the intake valve
camshaft. The VVT system includes the ECM, the OCV (Oil Control Valve) and the VVT controller. 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 cam-
shaft.
Example:
A DTC will set if: 1) the difference between the target and actual valve timing is more than 5 degrees of the
crankshaft angle (CA) and the condition continues for more than 4.5 sec.; or 2) the OCV is forcibly activated
70 times or more.
Advanced cam DTCs are subject to "1 trip" detection logic.
Retarded cam DTCs are subject to "2 trip" detection logic.
DI-77
DIAGNOSTICS - ENGINE (1GR-FE)

MONITOR STRATEGY
P0011 VVT system advance (Bank 1)
P0012 VVT system retard (Bank 1)
Related DTC
R l t d DTCs
P0021 VVT system advance (Bank 2)
P0022 VVT system retard (Bank 2)
Main sensors/components Camshaft position sensor
Required sensors/components Engine coolant temperature sensor,
Related sensors/components
Crankshaft position sensor

Frequency of operation Once per drive cycle
Duration 10 sec.
P0011, P0021: Immediate
MIL operation
P0012, P0022: 2 driving cycles
Sequence of operation None

TYPICAL ENABLING CONDITIONS
Specification
Item
It
Minimum Maximum
The monitor will run whenever these
See page DI-18
DTCs are not present

Battery voltage 11 V -
Engine RPM 500 rpm 4,000 rpm
ECT 75_C (167_F) 100_C (212_F)

TYPICAL MALFUNCTION THRESHOLDS
Detection Criteria Threshold
P0011, P0021 (Advance):
Deviation of actual valve timing and target valve timing More than 5_CA (Crankshaft angle)
Valve timing No change at advanced valve timing
P0012, P0022 (Retard):
Deviation of actual valve timing and target valve timing More than 5_CA (Crankshaft angle)
Valve timing No change at retarded valve timing

WIRING DIAGRAM
Refer to DTCs P0010 on page DI-70.

INSPECTION PROCEDURE
HINT:
S Bank 1 refers to bank that includes cylinder No. 1.
S Bank 2 refers to bank that does not include cylinder No. 1.
S If DTC P0011, P0012 is displayed, check the bank 1 VVT system.
S If DTC P0021, P0022 is displayed, check the bank 2 VVT system.
S Read freeze frame data using the hand-held tester. Freeze frame data records the engine conditions
when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle
was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at
the time of the malfunction.
DI-78
DIAGNOSTICS - ENGINE (1GR-FE)

1 Check operation of OCV.

PREPARATION:
(a) Connect the hand-held tester to the DLC3.
(b) Start the engine and warm it up.
(c) Turn the ignition switch to ON and turn the hand-held tester ON.
CHECK:
(a) Select the item: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VVT CTRL B1 or VVT CTRL B2.
(b) Using the hand-held tester, operate the OCV and check the engine speed.
OK:
Standard:
Tester operation Specified condition
OCV is OFF Normal engine speed
OCV is ON Rough idle or engine stall

OK VVT system is OK.*

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

2 Check valve timing (See page EM-44).

NG Adjust valve timing.

OK
DI-79
DIAGNOSTICS - ENGINE (1GR-FE)

3 Check voltage between terminals OCV+ and OCV- of ECM connector.

OCV Signal Waveform CHECK:
5 V/ (a) Inspection using the oscilloscope.
Division (b) During idling, check the waveform between the specified
(A) (A) (A) terminals of the E5 ECM connector.
HINT:
GND The waveform frequency (A) is lengthened as the engine speed
becomes higher.
OK:
1 msec./Division
A02397 Standard:
The correct waveform is as shown.

OC1+
OC1- OC2-
ECM Connector OC2+ NG Replace ECM (See page SF-66).
B17414

4 Check OCV (See page EM-70).

NG Replace OCV, and then go to step 6.

5 Check camshaft timing gear assembly (See page EM-70).

NG Replace camshaft timing gear, and then go to
step 7.

OK
DI-80
DIAGNOSTICS - ENGINE (1GR-FE)

6 Check oil control valve filter.

NG Replace oil control valve filter.

7 Check whether or not DTC P0010, P0012, P0021 or P0022 is stored.

PREPARATION:
(a) Clear the DTC (See page DI-42).
(b) Perform simulation test.
CHECK:
Check whether or not DTC P0011, P0012, P0021 or P0022 is stored (See page DI-42).
OK:
Standard:
DTC P0011, P0012, P0021 or P0022 is not stored.

OK VVT system is OK.*

Replace ECM (See page SF-66).

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