Sfi System Lack Of Power Or Hesitation

Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
3Zr-Fae Engine Control System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

INSPECTION PROCEDURE

CHECK WHETHER DTC OUTPUT

PERFORM BASIC INSPECTION

READ VALUE USING INTELLIGENT TESTER

PERFORM ACTIVE TEST USING INTELLIGENT TESTER

READ VALUE USING INTELLIGENT TESTER

SFI SYSTEM - Lack of Power or Hesitation


DESCRIPTION

The VALVEMATIC system is able to continuously change the valve lift amount and valve timing. For engines equipped with a VALVEMATIC system, when a part such as a rocker arm in the camshaft housing has mechanical problems, the valve lift amount does not change and problems occur, such as a lack of engine power or rough idling.

INSPECTION PROCEDURE

A lack of engine power occurs when the throttle valve is malfunctioning or when there is a clog in the intake or exhaust system. Therefore, during the inspection, confirm that there are no clogs in any parts.
HINT:
  1. When the throttle valve is malfunctioning, even if the accelerator pedal is fully depressed when the engine is running, the throttle valve does not fully open.
  2. When there is a clog in the intake system, even if the accelerator pedal is fully depressed, the MAP is not the same as the atmospheric pressure.
When performing this inspection on a vehicle equipped with the VALVEMATIC, perform the following procedures first in order to confirm that there are no VVT system malfunctions.
  1. Perform the VVT system Active Test and confirm that the VVT follows the VVT target.
  2. If the VVT system Active Test results are normal, perform the VALVEMATIC system Active Test.
NOTICE:
When the vehicle is not equipped with the VALVEMATIC, even if the VVT system inspection (the inspection that checks if idling becomes unstable when changing the VVT to the most advanced and retarded positions through the Active Test) is performed, it cannot be determined that the malfunction is in the VVT system.
1.CHECK WHETHER DTC OUTPUT

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    DTC is not output
    		A
    DTC is output
    		B



B
GO TO DTC CHART (RAV4_ACA30 RM000000PDF0FMX.html)
A


2.PERFORM BASIC INSPECTION

  1. Check the air cleaner filter element.

    HINT:
    If the air cleaner filter element is dirty, clean or replace it.

  1. Check if there are any clogs in the intake or exhaust system.

  1. Check the ignition timing (RAV4_ACA30 RM000002ZLZ00OX_01_0008.html).

  1. Check the fuel pressure (RAV4_ACA30 RM000001IQZ02QX_01_0002.html).

  1. Check the spark (RAV4_ACA30 RM000001EFG02EX_01_0001.html).

  1. Measure the cylinder compression pressure (RAV4_ACA30 RM000002ZLZ00OX_01_0010.html).

    Result
    Result
    		Proceed to
    Everything normal
    		A
    Repaired problem area but malfunction reoccurs
    		A
    Repaired problem area and malfunction does not reoccur
    		B



B
END
A


3.READ VALUE USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Short FT #1, Long FT #1, AFS Voltage B1 S1 and O2S B1 S2.

  1. Read the value while the vehicle is being driving.

    Result
    Result
    		Proceed to
    No abnormal values in Data List
    		A
    Abnormal values in Data List
    		B



B
CHECK FUEL SYSTEM
A


4.PERFORM ACTIVE TEST USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank1).

  1. Read the value.

    Result
    Result
    		Proceed to
    VVT angle follows VVT target angle
    		A
    VVT angle does not follow VVT target angle
    		B



B
CHECK VVT SYSTEM
A


5.READ VALUE USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VALVEMATIC (ENG ON).

  1. Maintain an engine speed of 3000 rpm with the shift lever in P (for CVT), or neutral (for Manual Transaxle) and the vehicle stationary.

  1. Read the value.

    Test Condition
    		Result
    High
    		VALVEMATIC Current Angle: 260°CA
    MAP: 20 to 35 kPa
    Low
    		VALVEMATIC Current Angle: 106°CA
    MAP: 70 to 100 kPa

    OK:
    Change in MAP during the Active Test
    HINT:
    When the vehicle is driven while there is a malfunction in the VALVEMATIC system and the valve lift amount is fixed at the minimum, the vehicle speed cannot exceed 10 to 60 km/h (6 to 37 mph).


NG
CHECK VALVEMATIC SYSTEM
OK

PERFORM SIMULATION TEST