Sfi System Vc Output Circuit

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
2Tr-Fbe Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

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 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.

Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fbe Engine Control.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


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fbe Engine Control.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 (HILUX_TGN26 RM000000WZ10Z6X.html)
B


3.CHECK MIL (THROTTLE POSITION SENSOR)

  1. Disconnect the throttle body with motor 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 with motor assembly connector.



A
REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY (THROTTLE POSITION SENSOR) (HILUX_TGN26 RM000000VWO01YX.html)
B


4.CHECK MIL (ACCELERATOR PEDAL POSITION SENSOR)

  1. Disconnect the accelerator pedal rod 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 accelerator pedal rod assembly connector.



A
REPLACE ACCELERATOR PEDAL ROD ASSEMBLY (ACCELERATOR PEDAL POSITION SENSOR) (HILUX_TGN26 RM000000VWD01YX.html)
B


5.CHECK HARNESS AND CONNECTOR

  1. Disconnect the throttle body with motor assembly connector.

  1. Disconnect the accelerator pedal rod assembly connector.

  1. Disconnect the ECM connectors.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    C95-10 (VCTA) - Body ground
    		Always
    		10 kΩ or higher
    G146-4 (VCPA) - Body ground
    		Always
    		10 kΩ or higher
    G146-3 (VCP2) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the throttle body with motor assembly connector.

  1. Reconnect the accelerator pedal rod assembly connector.

  1. Reconnect the ECM connectors.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (HILUX_TGN26 RM000000VW2024X.html)