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 valve timing (check for loose and a jumped tooth of timing chain)

DTC P0016 Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)

DTC P0018 Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A)


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DESCRIPTION

Refer to DTC P0335 (Click here).

DTC No.
DTC Detection Conditions
Trouble Areas
P0016
Deviations in crankshaft and camshaft position sensor (for intake camshaft) 1 signals (2 trip detection logic)
  1. Mechanical system (Timing chain has jumped tooth or chain stretched)
  2. ECM
P0018
Deviations in crankshaft and camshaft position sensor (for intake camshaft) 2 signals (2 trip detection logic)
  1. Mechanical system (Timing chain has jumped tooth or chain stretched)
  2. ECM

MONITOR DESCRIPTION

The ECM optimizes the valve timing by 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. The ECM calibrates the intake valve timing by setting the intake camshaft to the most retarded angle while the engine is idling. The ECM closes the OCV to retard the cam. The ECM stores this value as the VVT learning value. When the difference between the target and actual intake valve timings is 5° CA (Crankshaft Angle) or less, the ECM stores it.
If the VVT learning value matches the following conditions, the ECM determines the existence of a malfunction in the VVT system, and sets the DTC.
  1. The VVT learning value: Less than 22.5° CA, or more than 45.2° CA.
  2. The above condition continues for 18 seconds or more.
This DTC indicates that the intake camshaft has been installed toward the crankshaft at an incorrect angle, caused by factors such as the timing chain having jumped a tooth.
This monitor begins to run after the engine has idled for 5 minutes.

MONITOR STRATEGY


Related DTCs
P0016: Deviation in crankshaft position sensor signal and camshaft position sensor signal (Bank 1)
P0018: Deviation in crankshaft position sensor signal and camshaft position sensor signal (Bank 2)
Required Sensors / Components (Main)
VVT actuator
Required Sensors / Components (Related)
Camshaft position sensor, Crankshaft position sensor
Frequency of Operation
Once per driving cycle
Duration
Less than 60 seconds
MIL Operation
2 driving cycles
Sequence of Operation
None

TYPICAL ENABLING CONDITIONS


The monitor will run whenever these DTCs are not present
P0011, P0012 (VVT System1-Advance, Retard), P0021, P0022 (VVT System2-Adavance, Retard), P0115, P0116, P0117, P0118 (ECT Sensor),
Engine RPM
500 to 1,400 rpm

TYPICAL MALFUNCTION THRESHOLDS


P0016 and P0018:
One of the following conditions 1 or 2 is met:
-
1. VVT learning value at maximum retarded valve timing
Less than 22.5° CA
2. VVT learning value at maximum retarded valve timing
More than 45.2° CA

WIRING DIAGRAM

Refer to DTC P0335 (Click here).

INSPECTION PROCEDURE

HINT:
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 VALVE TIMING (CHECK FOR LOOSE AND A JUMPED TOOTH OF 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.
    NOTICE:
    After replacing the ECM or adjusting intake valve timing, confirm that the DTC output does not recur.

  1. Confirm that the DTC output does not recur.

    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Turn the tester on.

    4. Clear DTCs (Click here).

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

    6. Start the engine and warm it up.

    7. Allow the engine to idle for 1 minute or more, and then drive the vehicle for 1 minute or more.

    8. Confirm that no DTC is set, using the tester.



NGnext
ADJUST VALVE TIMING
OK
next down
REPLACE ECM