Sfi System Vc Output Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK MIL CONDITION

CHECK CONNECTION BETWEEN INTELLIGENT TESTER AND ECM

CHECK MIL (THROTTLE POSITION SENSOR)

CHECK MIL (ACCELERATOR PEDAL POSITION SENSOR)

CHECK MIL (CAMSHAFT POSITION SENSOR (FOR INTAKE SIDE))

CHECK MIL (CAMSHAFT POSITION SENSOR (FOR EXHAUST SIDE))

CHECK MIL (VACUUM SENSOR)

CHECK MIL (BATTERY CURRENT SENSOR)

CHECK MIL (OIL PRESSURE SENSOR)

CHECK HARNESS AND CONNECTOR

SFI SYSTEM - VC Output Circuit


DESCRIPTION

The ECM constantly generates a 5 V power supply voltage from the battery voltage supplied to the +B (BATT) terminal to operate the microprocessor. The ECM also provides this power source voltage to the sensors through the VC output circuit.

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Vc Output Circuit

When the VC circuit is short-circuited, the microprocessor in the ECM and sensors that are supplied with power through the VC circuit are inactivated because the power is not supplied from the VC circuit. Under this condition, the system does not start up and the MIL does not illuminate even if the system malfunctions.
HINT:
Under normal conditions, the MIL is illuminated for several seconds when the ignition switch is first turned to ON, and then goes off when the engine starts.

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Vc Output Circuit


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Vc Output Circuit


INSPECTION PROCEDURE

1.CHECK MIL CONDITION

  1. Check that the Malfunction Indicator Lamp (MIL) lights up when turning the ignition switch to ON.

    OK:
    MIL lights up.


NG
Go to step 2
OK

SYSTEM OK

2.CHECK CONNECTION BETWEEN INTELLIGENT TESTER AND ECM

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Check the communication between the tester and ECM.

    Result
    Result
    		Proceed to
    Communication is possible
    		A
    Communication is not possible
    		B


A
GO TO MIL CIRCUIT (RAV4_ACA30 RM000000WZ10TGX.html)
B


3.CHECK MIL (THROTTLE POSITION SENSOR)

  1. Disconnect the throttle body assembly connector.

  1. Turn the ignition switch to ON.

  1. Check the MIL.

    Result
    Result
    		Proceed to
    MIL illuminates
    		A
    MIL does not illuminate
    		B

  1. Reconnect the throttle body assembly connector.



A
REPLACE THROTTLE BODY ASSEMBLY (RAV4_ACA30 RM000002WZZ03WX.html)
B


4.CHECK MIL (ACCELERATOR PEDAL POSITION SENSOR)

  1. Disconnect the accelerator pedal position sensor connector.

  1. Turn the ignition switch to ON.

  1. Check the MIL.

    Result
    Result
    		Proceed to
    MIL illuminates
    		A
    MIL does not illuminate
    		B

  1. Reconnect the accelerator pedal position sensor connector.



A
REPLACE ACCELERATOR PEDAL ROD (ACCELERATOR PEDAL POSITION SENSOR) (RAV4_ACA30 RM0000017UL01VX.html)
B


5.CHECK MIL (CAMSHAFT POSITION SENSOR (FOR INTAKE SIDE))

  1. Disconnect the camshaft position sensor (for intake side) connector.

  1. Turn the ignition switch to ON.

  1. Check the MIL.

    Result
    Result
    		Proceed to
    MIL illuminates
    		A
    MIL does not illuminate
    		B

  1. Reconnect the camshaft position sensor (for intake side) connector.



A
REPLACE CAMSHAFT POSITION SENSOR (FOR INTAKE SIDE) (RAV4_ACA30 RM000002WR500UX.html)
B


6.CHECK MIL (CAMSHAFT POSITION SENSOR (FOR EXHAUST SIDE))

  1. Disconnect the camshaft position sensor (for exhaust side) connector.

  1. Turn the ignition switch to ON.

  1. Check the MIL.

    Result
    Result
    		Proceed to
    MIL illuminates
    		A
    MIL does not illuminate
    		B

  1. Reconnect the camshaft position sensor (for exhaust side) connector.



A
REPLACE CAMSHAFT POSITION SENSOR (FOR EXHAUST SIDE) (RAV4_ACA30 RM000002WR500UX.html)
B


7.CHECK MIL (VACUUM SENSOR)

  1. Disconnect the vacuum sensor connector.

  1. Turn the ignition switch to ON.

  1. Check the MIL.

    Result
    Result
    		Proceed to
    MIL illuminates
    		A
    MIL does not illuminate
    		B

  1. Reconnect the vacuum sensor connector.



A
REPLACE VACUUM SENSOR (RAV4_ACA30 RM0000037KH005X.html)
B


8.CHECK MIL (BATTERY CURRENT SENSOR)

  1. Disconnect the battery current sensor connector.

  1. Turn the ignition switch to ON.

  1. Check the MIL.

    Result
    Result
    		Proceed to
    MIL illuminates
    		A
    MIL does not illuminate
    		B

  1. Reconnect the battery current sensor connector.



A
REPLACE BATTERY CURRENT SENSOR ASSEMBLY (RAV4_ACA30 RM000003XJA000X.html)
B


9.CHECK MIL (OIL PRESSURE SENSOR)

  1. Disconnect the oil pressure sensor connector.

  1. Turn the ignition switch to ON.

  1. Check the MIL.

    Result
    Result
    		Proceed to
    MIL illuminates
    		A
    MIL does not illuminate
    		B

  1. Reconnect the oil pressure sensor connector.



A
REPLACE OIL PRESSURE SENSOR (RAV4_ACA30 RM0000020TV00QX.html)
B


10.CHECK HARNESS AND CONNECTOR

  1. Disconnect the throttle body assembly connector.

  1. Disconnect the accelerator pedal position sensor connector.

  1. Disconnect the camshaft position sensor (for intake camshaft) connector.

  1. Disconnect the camshaft position sensor (for exhaust camshaft) connector.

  1. Disconnect the vacuum sensor connector.

  1. Disconnect the battery current sensor connector.

  1. Disconnect the oil pressure sensor connector.



    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Vc Output Circuit

  1. Disconnect the ECM connectors.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    B32-89 (VCTA) - Body ground
    		Always
    		10 kΩ or higher
    A12-57 (VCPA) - Body ground
    		Always
    		10 kΩ or higher
    A12-58 (VCP2) - Body ground
    		Always
    		10 kΩ or higher
    B32-119 (VCV1) - Body ground
    		Always
    		10 kΩ or higher
    B32-121 (VCE1) - Body ground
    		Always
    		10 kΩ or higher
    B32-67 (VCPM) - Body ground
    		Always
    		10 kΩ or higher
    B32-95 (VCPT) - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to ECM)
    *2
    		Front view of wire harness connector
    (to ECM)

  1. Reconnect the throttle body assembly connector.

  1. Reconnect the accelerator pedal position sensor connector.

  1. Reconnect the camshaft position sensor (for intake camshaft) connector.

  1. Reconnect the camshaft position sensor (for exhaust camshaft) connector.

  1. Reconnect the vacuum sensor connector.

  1. Reconnect the battery current sensor connector.

  1. Reconnect the oil pressure sensor connector.

  1. Reconnect the ECM connectors.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (RAV4_ACA30 RM0000017UO01KX.html)