Sfi System Vc Output Circuit

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
1Gr-Fe Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK MIL

CHECK COMMUNICATION BETWEEN INTELLIGENT TESTER AND ECM

CHECK MIL (THROTTLE BODY WITH MOTOR ASSEMBLY)

CHECK MIL (ACCELERATOR PEDAL ROD ASSEMBLY)

CHECK MIL (VVT SENSOR FOR BANK 1)

CHECK MIL (VVT SENSOR FOR BANK 2)

CHECK HARNESS AND CONNECTOR (VC OUTPUT CIRCUIT)

SFI SYSTEM - VC Output Circuit


DESCRIPTION

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

Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe 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 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. The MIL goes off when the engine is started.

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System.Sfi System Vc Output Circuit


INSPECTION PROCEDURE

1.CHECK MIL

  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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (HILUX_TGN26 RM000000PDG0R6X.html)

2.CHECK COMMUNICATION BETWEEN INTELLIGENT TESTER AND ECM

  1. Connect an intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Check the communication between the tester and ECM.

    Result:
    Result
    		Proceed To
    Communication is not possible
    		A
    Communication is possible
    		B


B
GO TO MIL CIRCUIT (HILUX_TGN26 RM000000WZ10Z4X.html)
A


3.CHECK MIL (THROTTLE BODY WITH MOTOR ASSEMBLY)

  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 does not illuminate
    		A
    MIL illuminates
    		B


B
REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY (HILUX_TGN26 RM000000VWO02HX.html)
A


4.CHECK MIL (ACCELERATOR PEDAL ROD ASSEMBLY)

  1. Disconnect the accelerator pedal rod assembly connector.

  1. Turn the ignition switch to ON.

  1. Check the MIL.

    Result:
    Result
    		Proceed To
    MIL does not illuminate
    		A
    MIL illuminates
    		B


B
REPLACE ACCELERATOR PEDAL ROD ASSEMBLY (HILUX_TGN26 RM000000VWD02BX.html)
A


5.CHECK MIL (VVT SENSOR FOR BANK 1)

  1. Disconnect the VVT sensor (for bank 1) connector.

  1. Turn the ignition switch to ON.

  1. Check the MIL.

    Result:
    Result
    		Proceed To
    MIL does not illuminate
    		A
    MIL illuminates
    		B


B
REPLACE VVT SENSOR FOR BANK 1 (HILUX_TGN26 RM000000XGZ05CX.html)
A


6.CHECK MIL (VVT SENSOR FOR BANK 2)

  1. Disconnect the VVT sensor (for bank 2) connector.

  1. Turn the ignition switch to ON.

  1. Check the MIL.

    Result:
    Result
    		Proceed To
    MIL does not illuminate
    		A
    MIL illuminates
    		B


B
REPLACE VVT SENSOR FOR BANK 2 (HILUX_TGN26 RM000000XGZ05CX.html)
A


7.CHECK HARNESS AND CONNECTOR (VC OUTPUT CIRCUIT)

  1. Disconnect the throttle body with motor assembly connector.

  1. Disconnect the accelerator pedal rod assembly connector.

  1. Disconnect the VVT sensor (for bank 1) connector.

  1. Disconnect the VVT sensor (for bank 2) connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    C129-23 (VC) - Body ground
    		Always
    		10 kΩ or higher
    G155-26 (VCPA) - Body ground
    		Always
    		10 kΩ or higher
    G155-27 (VCP2) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (HILUX_TGN26 RM000000VW202SX.html)