СИСТЕМА SFI > Выходная цепь VC

для подготовки Нажмите здесь


DESCRIPTION

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

A116143E31

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.

УКАЗАНИЕ:
Under normal conditions, the MIL is illuminated for several seconds when the engine switch is first turned on (IG). The MIL goes off when the engine is started.


WIRING DIAGRAM


A147873E02


A153288E02


INSPECTION PROCEDURE

1.CHECK MIL

  1. Check that Malfunction Indicator Lamp (MIL) lights up when turning the engine switch on (IG).

    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 engine switch on (IG) and tester ON.

  1. Check the communication between the tester and ECM.

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



A
GO TO MIL CIRCUIT (Нажмите здесь)
B


3.CHECK MIL (THROTTLE BODY)

  1. Disconnect the throttle body connector.

  1. Turn the engine switch on (IG).

  1. Check the MIL.

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



A
REPLACE THROTTLE BODY ASSEMBLY (Нажмите здесь)
B


4.CHECK MIL (ACCELERATOR PEDAL)

  1. Disconnect the accelerator pedal position sensor connector.

  1. Turn the engine switch on (IG).

  1. Check the MIL.

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



A
REPLACE ACCELERATOR PEDAL ASSEMBLY (Нажмите здесь)
B


5.CHECK MIL (CRANKSHAFT POSITION SENSOR)

  1. Disconnect the crankshaft position sensor connector.

  1. Turn the engine switch on (IG).

  1. Check the MIL.

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



A
REPLACE CRANKSHAFT POSITION SENSOR (Нажмите здесь)
B


6.CHECK MIL (CAMSHAFT POSITION SENSOR)

  1. Disconnect the camshaft position sensor connector.

  1. Turn the engine switch on (IG).

  1. Check the MIL.

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



A
REPLACE CAMSHAFT POSITION SENSOR (Нажмите здесь)
B


7.CHECK MIL (VVT SENSOR FOR INTAKE SIDE BANK 1)

  1. Disconnect the VVT sensor for intake camshaft bank 1 connector.

  1. Turn the engine switch on (IG).

  1. Check the MIL.

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



A
REPLACE VVT SENSOR FOR INTAKE CAMSHAFT BANK 1 (Нажмите здесь)
B


8.CHECK MIL (VVT SENSOR FOR EXHAUST SIDE BANK 1)

  1. Disconnect the VVT sensor for exhaust side bank 1 connector.

  1. Turn the engine switch on (IG).

  1. Check the MIL.

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



A
REPLACE VVT SENSOR FOR EXHAUST SIDE BANK 1 (Нажмите здесь)
B


9.CHECK MIL (VVT SENSOR FOR INTAKE CAMSHAFT BANK 2)

  1. Disconnect the VVT sensor for intake camshaft bank 2 connector.

  1. Turn the engine switch on (IG).

  1. Check the MIL.

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



A
REPLACE VVT SENSOR FOR INTAKE CAMSHAFT BANK 2 (Нажмите здесь)
B


10.CHECK MIL (VVT SENSOR FOR EXHAUST SIDE BANK 2)

  1. Disconnect the VVT sensor for exhaust side bank 2 connector.

  1. Turn the engine switch on (IG).

  1. Check the MIL.

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



A
REPLACE VVT SENSOR FOR EXHAUST SIDE BANK 2 (Нажмите здесь)
B


11.CHECK HARNESS AND CONNECTOR


    A152208E01

  1. Disconnect the throttle body connector.

  1. Disconnect the accelerator pedal position sensor connector.

  1. Disconnect the crankshaft position sensor connector.

  1. Disconnect the camshaft position sensor connector.

  1. Disconnect the VVT sensor connectors.

  1. Disconnect the E1, E2 and A14 ECM connectors.

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

    Standard resistance (Check for short):
    Tester Connection
    		Condition
    		Specified Condition
    E2-34 (VCTA) - Body ground
    		Always
    		10 kΩ or higher
    A14-23 (VCPA) - Body ground
    		Always
    		10 kΩ or higher
    A14-22 (VCP2) - Body ground
    		Always
    		10 kΩ or higher
    E1-18 (VC) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (Нажмите здесь)