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 (FUEL PRESSURE SENSOR)

CHECK WIRE HARNESS (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 position sensor, EGR valve position sensor, manifold absolute pressure 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


INSPECTION PROCEDURE

NOTICE:
If the ECM is replaced, the new ECM needs initialization (Toyota 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 intelligent 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
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.

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

NEXT


4.CHECK MIL (THROTTLE POSITION SENSOR)

  1. Disconnect the T23 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


B
REPLACE THROTTLE BODY ASSEMBLY
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


B
REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR
A


6.CHECK MIL (FUEL PRESSURE SENSOR)

  1. Disconnect the F8 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


B
REPLACE COMMON RAIL ASSEMBLY
A


7.CHECK WIRE HARNESS (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 F8 fuel pressure sensor connector.

  1. Disconnect the E7 ECM connector.

  1. Measure the resistance of the wire harness connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    E7-18 (VC) - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE ECM