Sfi System Vc Output Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK MIL

CHECK CONNECTION BETWEEN INTELLIGENT TESTER AND ECM

INSPECT ECM (VC VOLTAGE)

CHECK MIL (THROTTLE POSITION SENSOR)

CHECK MIL (ACCELERATOR PEDAL POSITION SENSOR)

CHECK MIL (VARIABLE RESISTOR)

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

SFI SYSTEM - VC Output Circuit


DESCRIPTION

The VC voltage (5 V) is generated in the ECM. The voltage is used to supply power to the throttle position sensor, accelerator pedal position sensor, etc.

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.2Tr-Fe Engine Control System.Sfi System.Sfi System Vc Output Circuit

HINT:
*: for Leaded Gasoline Specification Vehicle.

INSPECTION PROCEDURE

1.CHECK MIL

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

    OK:
    MIL lights up


OK
SYSTEM OK
NG


2.CHECK CONNECTION BETWEEN INTELLIGENT TESTER AND ECM

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch ON and turn the intelligent tester ON.

  1. Check the connection between the intelligent tester and ECM.

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


A
GO TO MIL CIRCUIT
B


3.INSPECT ECM (VC VOLTAGE)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.2Tr-Fe Engine Control System.Sfi System.Sfi System Vc Output Circuit

  1. Turn the ignition switch ON.

  1. Measure the voltage of the ECM connector.

    Standard voltage:
    Tester Connection
    		Specified Condition
    E11-18 (VC) - E11-3 (E1)
    		Voltage is not 5 V

NEXT


4.CHECK MIL (THROTTLE POSITION SENSOR)

  1. Disconnect the T1 throttle body connector.

  1. Turn the ignition switch ON.

  1. Check the MIL.

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


A
REPLACE THROTTLE BODY
B


5.CHECK MIL (ACCELERATOR PEDAL POSITION SENSOR)

  1. Disconnect the A22 accelerator pedal position sensor connector.

  1. Turn the ignition switch ON.

  1. Check the MIL.

    Result:
    Condition
    		Proceed to
    MIL illuminates
    		A
    MIL does not illuminate (for Unleaded Gasoline Specification Vehicle
    		B
    MIL does not illuminate (for Leaded Gasoline Specification Vehicle)
    		C


A
REPLACE ACCELERATOR PEDAL ROD

B
Go to step 7
C


6.CHECK MIL (VARIABLE RESISTOR)

  1. Disconnect the V6 variable resistor connector.

  1. Turn the ignition switch ON.

  1. Check the MIL.

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


A
REPLACE VARIABLE RESISTOR
B


7.CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.2Tr-Fe Engine Control System.Sfi System.Sfi System Vc Output Circuit

  1. Disconnect the T1 throttle body connector.

  1. Disconnect the A22 accelerator pedal position sensor connector.

  1. Disconnect the V6 variable resistor connector (only for leaded gasoline specification vehicle).

  1. Disconnect the E8 and E11 ECM connectors.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    E11-18 (VC) - Body ground
    		10 kΩ or higher
    E8-26 (VCPA) - Body ground
    		10 kΩ or higher
    E8-27 (VCP2) - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM