Ecd System Vc Output Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK MIL

CHECK CONNECTION BETWEEN INTELLIGENT TESTER AND ECM

CHECK ECM (VC VOLTAGE)

CHECK MIL (THROTTLE POSITION SENSOR)

CHECK MIL (MANIFOLD ABSOLUTE PRESSURE SENSOR)

CHECK MIL (ACCELERATOR PEDAL POSITION SENSOR)

CHECK MIL (FUEL PRESSURE SENSOR)

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

ECD 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 body assembly, EGR valve position sensor, turbo pressure sensor, accelerator position sensor and fuel pressure sensor.

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Vc Output Circuit


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Vc Output Circuit


INSPECTION PROCEDURE

NOTICE:
After replacing the ECM, the new ECM needs registration (Toyota Fortuner RM0000012XK030X.html) and initialization (See page 8Toyota Fortuner RM0000012X2005X.html).
1.CHECK MIL

  1. Check that the Malfunction Indicator Lamp (MIL) 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 tester ON.

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

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


B
GO TO MIL CIRCUIT (Toyota Fortuner RM000000TI6021X.html)
A


3.CHECK ECM (VC VOLTAGE)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Vc Output Circuit

  1. Turn the ignition switch ON.

  1. Measure the voltage of the ECM connector.

    Result:
    Tester Connection
    		Specified Condition
    VC (E7-18) - E2 (E7-28)
    		Voltage is not 5 V

NEXT


4.CHECK MIL (THROTTLE POSITION SENSOR)

  1. Disconnect the T3 throttle position sensor connector.

  1. Turn the ignition switch ON.

  1. Check the MIL.

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

  1. Reconnect the throttle position sensor connector.



B
REPLACE DIESEL THROTTLE BODY ASSEMBLY (Toyota Fortuner RM0000013ZD004X.html)
A


5.CHECK MIL (MANIFOLD ABSOLUTE PRESSURE SENSOR)

  1. Disconnect the T9 manifold absolute pressure sensor connector.

  1. Turn the ignition switch ON.

  1. Check the MIL.

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

  1. Reconnect the manifold absolute pressure sensor connector.



B
REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR
A


6.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 does not illuminate
    		A
    MIL illuminates
    		B

  1. Reconnect the accelerator position sensor connector.



B
REPLACE ACCELERATOR PEDAL ROD ASSEMBLY (Toyota Fortuner RM0000013ZF006X.html)
A


7.CHECK MIL (FUEL PRESSURE SENSOR)

  1. Disconnect the F32 fuel pressure sensor connector.

  1. Turn the ignition switch ON.

  1. Check the MIL.

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

  1. Reconnect the fuel pressure sensor connector.



B
REPLACE COMMON RAIL ASSEMBLY (Toyota Fortuner RM000002SY500QX.html)
A


8.CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Vc Output Circuit

  1. Disconnect the T3 throttle position sensor connector.

  1. Disconnect the T9 manifold absolute pressure sensor connector.

  1. Disconnect the F32 fuel pressure sensor connector.

  1. Disconnect the A22 accelerator pedal position sensor connector.

  1. Disconnect the E7 ECM connector.

  1. Measure the resistance of the wire harness connector.

    Standard resistance (Check for short):
    Tester Connection
    		Specified Condition
    VC (E7-18) - Body ground
    		10 kΩ or higher
    VCS (E6-2) - Body ground
    VCPA (E4-26) - Body ground
    VCP2 (E4-27) - Body ground

  1. Reconnect the throttle position sensor connector.

  1. Reconnect the manifold absolute pressure sensor connector.

  1. Reconnect the fuel pressure sensor connector.

  1. Reconnect the accelerator pedal position sensor connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (Toyota Fortuner RM0000013Z0004X.html)