Sfi System Vc Output Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK MIL

CHECK CONNECTION BETWEEN INTELLIGENT TESTER AND ECM

CHECK ECM

CHECK MIL (THROTTLE POSITION SENSOR)

CHECK MIL (CAMSHAFT POSITION SENSOR [BANK 1])

CHECK MIL (CAMSHAFT POSITION SENSOR [BANK 2])

CHECK WIRE HARNESS (ECM - BODY GROUND)

SFI 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, camshaft position sensor and crankshaft position sensor.

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Gr-Fe Engine Control System.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 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
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Gr-Fe Engine Control System.Sfi System.Sfi System Vc Output Circuit

  1. Turn the ignition switch ON.

  1. Measure the voltage of the ECM connector.

Result:
Voltage is not 5 V

NEXT


4.CHECK MIL (THROTTLE POSITION SENSOR)

  1. Disconnect the T26 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 (CAMSHAFT POSITION SENSOR [BANK 1])

  1. Disconnect the C21 camshaft 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 CAMSHAFT POSITION SENSOR (BANK 1)
A


6.CHECK MIL (CAMSHAFT POSITION SENSOR [BANK 2])

  1. Disconnect the C20 camshaft 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 CAMSHAFT POSITION SENSOR (BANK 2)
A


7.CHECK WIRE HARNESS (ECM - BODY GROUND)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Gr-Fe Engine Control System.Sfi System.Sfi System Vc Output Circuit

  1. Disconnect the T26 throttle position sensor connector.

  1. Disconnect the C20 and C21 camshaft position sensor connectors.

  1. Disconnect the E15 ECM connector.

  1. Measure the resistance of the wire harness side connector.

Standard resistance (check for short):
Tester Connection
Specified Condition
E15-23 (VC) - Body ground
10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE ECM