Brand:

Toyota

Model Name:

4Runner GRN210 215 UZN210 215

Manual:

Repair Manual

Section:

1Gr-Fe Engine Control System

Title:

Sfi System

  1. Description

  2. Monitor description

  3. Monitor strategy

  4. Typical enabling conditions

  5. Typical malfunction thresholds

  6. Wiring diagram

  7. Inspection procedure

  8. Check any other dtcs output (in addition to dtc p0011, p0012, p0021 or p0022)

  9. Perform active test by intelligent tester (operate ocv)

  10. Check whether dtc output recurs (dtc p0011, p0012, p0021 or p0022)

  11. Check valve timing (check for loose and jumped teeth on timing chain)

  12. Inspect camshaft timing oil control valve assembly (ocv)

  13. Check oil pipe and oil control valve filter

  14. Replace camshaft timing gear assembly

  15. Check whether dtc output recurs

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)

HINT:
If DTC P0011, P0012, P0021 or P0022 is present, check the VVT (Variable Valve Timing) system.

DESCRIPTION

Refer to DTC P0010 (Click here).

DTC No.
DTC Detection Conditions
Trouble Areas
P0011
P0021
Advanced cam timing:
With warm engine and engine speed of between 550 rpm and 4,000 rpm, all conditions (a), (b) and (c) are met (1 trip detection logic):
(a) Difference between target and actual intake valve timings is more than 5° CA (Crankshaft Angle) for 4.5 seconds
(b) Current intake valve timing is fixed (timing changes less than 5° CA in 5 seconds)
(c) Variations in VVT controller timing are more than 19° CA of maximum delayed timing (advanced)
  1. Valve timing
  2. OCV
  3. OCV filter
  4. Intake camshaft timing gear assembly
  5. ECM
P0012
P0022
Retarded cam timing:
With warm engine and engine speed of between 550 rpm and 4,000 rpm, all conditions (a), (b) and (c) are met (2 trip detection logic):
(a) Difference between target and actual intake valve is timings more than 5° CA (Crankshaft Angle) for 4.5 seconds
(b) Current intake valve timing is fixed (timing changes less than 5° CA in 5 seconds)
(c) Variations in VVT controller timing is 19° CA or less of maximum delayed timing (retarded)
  1. Valve timing
  2. OCV
  3. OCV filter
  4. Camshaft timing gear assembly
  5. ECM

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 Oil Control Valve (OCV) and the VVT controller. The ECM sends a target duty-cycle control signal to the OCV. This control signal regulates the oil pressure applied 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 actual intake valve timing are small, the ECM interprets this as the VVT controller stuck malfunction and sets a DTC.
Example:
  1. A DTC will be set when the following conditions 1), 2) and 3) are met:
  2. 1) The difference between the target and actual intake valve timings is more than 5° CA (Crankshaft Angle) and the condition continues for more than 4.5 seconds.
  3. 2) It takes 5 seconds or more to change the valve timing by 5° CA.
  4. 3) After above conditions 1) and 2) are met, the OCV is forcibly activated 63 times or more.
    DTCs P0011 and P0021 (Advanced Cam Timing) are subject to 1 trip detection logic.
    DTCs P0012 and P0022 (Retarded Cam Timing) are subject to 2 trip detection logic.
    These DTCs indicate that the VVT controller cannot operate properly due to OCV malfunctions or the presence of foreign objects in the OCV.
  5. The monitor will not run unless the following conditions are met:
    - The engine is warm (the engine coolant temperature is 75°C [167°F] or more).
    - The vehicle has been driven at more than 40 mph (64 km/h) for 3 minutes.
    - The engine has idled for 3 minutes.

MONITOR STRATEGY


Related DTCs
P0011: VVT system advance (Bank 1)
P0012: VVT system retard (Bank 1)
P0021: VVT system advance (Bank 2)
P0022: VVT system retard (Bank 2)
Required sensors / components (Main)
VVT OCV, VVT Actuator
Required sensors / components (Related)
Crankshaft position sensor, Camshaft position sensor, ECT sensor
Frequency of operation
Once per driving cycles
Duration
Less than 10 seconds
MIL operation
P0011 and P0021: Immediate
P0012 and P0022: 2 driving cycles
Sequence operation
None

TYPICAL ENABLING CONDITIONS


The monitor will run whenever these DTCs are not present
P0100, P0101, P0102, P0103 (MAF Sensor), P0115, P0116, P0117, P0118 (ECT Sensor), P0125 (Insufficient ECT for Closed Loop), P0335 (CKP Sensor), P0340 (VVT Sensor 1, 2), P0351, P0352, P0353, P0354, P0355, P0356 (Ignitor)
Battery voltage
11 V or more
Engine RPM
500 to 4,000 rpm
ECT
75 to 100°C (167 to 212°F)

TYPICAL MALFUNCTION THRESHOLDS


P0011, P0021:
Duration of valve timing
More than 5° CA (Crankshaft angle)
Valve timing
No change at advanced valve timing

P0012, P0022:
Duration of valve timing
More than 5° CA (Crankshaft angle)
Valve timing
No change at retarded valve timing
If the difference between the target and actual camshaft timings is greater 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 (Click here).

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
HINT:
  1. If DTC P0011 or P0012 is displayed, check the bank 1 VVT system circuit.
  2. Bank 1 refers to the bank that includes cylinder No. 1.
  3. If DTC P0021 or P0022 is displayed, check the bank 2 VVT system circuit.
  4. Bank 2 refers to the bank that does not include cylinder No. 1.
  5. 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 be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
1.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0011, P0012, P0021 OR P0022)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on and turn the tester on.

  1. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.

  1. Read DTCs.

    Result:

    Display (DTC Output)
    		Proceed to
    P0011, P0012, P0021 or P0022
    		A
    P0011, P0012, P0021 or P0022 and other DTCs
    		B
    HINT:
    If any DTCs other than P0011, P0012, P0021 or P0022 are output, troubleshoot those DTCs first.


Bnext
GO TO DTC CHART
A
next down

2.PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATE OCV)

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine and turn the tester on.

  1. Warm up the engine.

  1. Select the following menu items on the tester: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VVT CTRL B1.

  1. Check the engine speed while operating the Oil Control Valve (OCV) using the tester.

    OK:

    Tester Operations
    		Specified Conditions
    OCV OFF
    		Normal engine idle speed
    OCV ON
    		Engine idles roughly or stalls (soon after OCV switched from OFF to ON)


NGnext
Go to step 4
OK
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3.CHECK WHETHER DTC OUTPUT RECURS (DTC P0011, P0012, P0021 OR P0022)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on and turn the tester on.

  1. Clear DTCs (Click here).

  1. Start the engine and warm it up.

  1. Select check mode using the tester (Click here).

  1. Drive the vehicle for more than 10 minutes.

  1. Read DTCs using the tester.

    OK:
    No DTC output.


NGnext
Go to step 4
OK
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END

4.CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN)
  1. Remove the cylinder head covers RH and LH. 4Runner

  2. Remove the cylinder head covers RH and LH.

  1. Turn the crankshaft to align the matchmarks of the crankshaft.

  1. Align the notch of the crankshaft pulley to the "0" position.

  1. Check if the matchmarks of the camshaft pulley and camshaft bearing cap align.

  1. Turn the crankshaft clockwise by 360° if the matchmarks do not align. Check if they align once again.

    OK:
    The matchmarks of the camshaft pulley and the camshaft bearing cap align when the notch of the crankshaft pulley is in the "0" position.


NGnext
ADJUST VALVE TIMING
OK
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5.INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (OCV)
  1. Remove the OCV. 4Runner

  2. Remove the OCV.

  1. Measure the resistance between the terminals of the OCV.

    Resistance:
    6.9 to 7.9 Ω at 20°C (68°F)

  1. Apply the positive battery voltage to terminal 1 and negative battery voltage to terminal 2. Check the valve operation.

    OK:
    Valve moves quickly.

  1. Reinstall the OCV.



NGnext
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
OK
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6.CHECK OIL PIPE AND OIL CONTROL VALVE FILTER
OK:
The filter is not clogged.


NGnext
REPLACE OIL PIPE OR OIL CONTROL VALVE FILTER
OK
next down

7.REPLACE CAMSHAFT TIMING GEAR ASSEMBLY

NEXT
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8.CHECK WHETHER DTC OUTPUT RECURS

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on (IG) and turn the tester on.

  1. Clear DTCs (Click here).

  1. Start the engine and warm it up.

  1. Select the check mode using the tester (Click here).

  1. Drive the vehicle for more than 10 minutes.

  1. Confirm that no DTC is set using the tester.

    OK:
    No DTC output.
    HINT:
    DTC P0011, P0012, P0021 or P0022 is output when foreign objects in engine oil are caught in some parts of the system. These codes will stay registered even if the system returns to normal after a short time. These foreign objects are then captured by the oil filter, thus eliminating the source of the problem.


NGnext
REPLACE ECM
OK
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END