Sfi System (W/O Secondary Air Injection System) Vc Output Circuit

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
2Tr-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 POSITION SENSOR)

CHECK MIL (ACCELERATOR PEDAL POSITION SENSOR)

CHECK HARNESS AND CONNECTOR

SFI SYSTEM (w/o Secondary Air Injection System) - VC Output Circuit


DESCRIPTION

The ECM constantly generates a 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 source voltage to the sensors through the VC output circuit.

Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection System).Sfi System (W/O Secondary Air Injection System) Vc Output Circuit

When the VC circuit is short-circuited, the microprocessor in the ECM and the sensors that are supplied with power through the VC circuit are inactivated because 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 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection System).Sfi System (W/O Secondary Air Injection System) Vc Output Circuit


INSPECTION PROCEDURE

1.CHECK MIL

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

    OK:
    MIL lights up.


NG
Go to step 2
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (HILUX_TGN26 RM000000PDG0O9X.html)

2.CHECK COMMUNICATION BETWEEN INTELLIGENT TESTER AND ECM

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the intelligent tester on.

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

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


A
GO TO MIL CIRCUIT (HILUX_TGN26 RM000000WZ10UTX.html)
B


3.CHECK MIL (THROTTLE POSITION SENSOR)

  1. Disconnect the throttle body with motor connector.

  1. Turn the ignition switch to ON.

  1. Check the MIL.

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


A
REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY (HILUX_TGN26 RM000000VWO01XX.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


A
REPLACE ACCELERATOR PEDAL ROD ASSEMBLY (HILUX_TGN26 RM000000VWD01XX.html)
B


5.CHECK HARNESS AND CONNECTOR

  1. Disconnect the throttle body with motor connector.

  1. Disconnect the accelerator pedal position sensor 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
    C75-18 (VC) - Body ground
    		Always
    		10 kΩ or higher
    G89-26 (VCPA) - Body ground
    		Always
    		10 kΩ or higher
    G89-27 (VCP2) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (HILUX_TGN26 RM000000VW202LX.html)