SFI SYSTEM VC Output Circuit

DTC Code DTC Name
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.

A206916E22

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.

Tip:

Under normal conditions, the MIL is illuminated when the ignition switch is turned to ON. The MIL goes off when the engine is started.

WIRING DIAGRAM

A282859E15
A318634E04

PROCEDURE

  1. CHECK MIL CONDITION

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

      OK

      MIL lights up.

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    (Click here)

    NG

  2. CHECK CONNECTION BETWEEN GTS AND ECM

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Check for communication between the GTS and ECM.

      Result

      Result

      Proceed to

      Communication is not possible

      A

      Communication is possible

      B
    B

    GO TO MIL CIRCUIT

    (Click here)

    A

  3. CHECK MIL (THROTTLE POSITION SENSOR)

    1. Disconnect the throttle body assembly connector.

    2. Turn the ignition switch to ON.

    3. Check the MIL.

      Result

      Result

      Proceed to

      MIL does not illuminate

      A

      MIL illuminates

      B
      Tip:

      Perform "Inspection After Repair" after replacing the throttle body assembly (Click here).

    B

    REPLACE THROTTLE BODY ASSEMBLY

    (Click here)

    A

  4. CHECK MIL (ACCELERATOR PEDAL SENSOR ASSEMBLY)

    1. Disconnect the accelerator pedal sensor assembly connector.

    2. Turn the ignition switch to ON.

    3. Check the MIL.

      Result

      Result

      Proceed to

      MIL does not illuminate

      A

      MIL illuminates

      B
    B

    REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY

    (Click here)

    A

  5. CHECK MIL (CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT))

    1. Disconnect the camshaft position sensor (for intake camshaft) connector.

    2. Turn the ignition switch to ON.

    3. Check the MIL.

      Result

      Result

      Proceed to

      MIL does not illuminate

      A

      MIL illuminates

      B
    B

    REPLACE CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT)

    (Click here)

    A

  6. CHECK MIL (CAMSHAFT POSITION SENSOR (FOR EXHAUST CAMSHAFT))

    1. Disconnect the camshaft position sensor (for exhaust camshaft) connector.

    2. Turn the ignition switch to ON.

    3. Check the MIL.

      Result

      Result

      Proceed to

      MIL does not illuminate

      A

      MIL illuminates

      B
    B

    REPLACE CAMSHAFT POSITION SENSOR (FOR EXHAUST CAMSHAFT)

    (Click here)

    A

  7. CHECK MIL (CRANKSHAFT POSITION SENSOR)

    1. Disconnect the crankshaft position sensor connector.

    2. Turn the ignition switch to ON.

    3. Check the MIL.

      Result

      Result

      Proceed to

      MIL does not illuminate

      A

      MIL illuminates

      B
    B

    REPLACE CRANKSHAFT POSITION SENSOR

    (Click here)

    A

  8. CHECK MIL (MANIFOLD ABSOLUTE PRESSURE SENSOR)

    1. Disconnect the manifold absolute pressure sensor connector.

    2. Turn the ignition switch to ON.

    3. Check the MIL.

      Result

      Result

      Proceed to

      MIL does not illuminate (for CVT Models)

      A

      MIL does not illuminate (for Manual Transaxle Models)

      B

      MIL illuminates

      C
    B

    CHECK HARNESS AND CONNECTORClick here

    C

    REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR

    (Click here)

    A

  9. CHECK MIL (OIL PRESSURE SENSOR)

    1. Disconnect the oil pressure sensor connector.

    2. Turn the ignition switch to ON.

    3. Check the MIL.

      Result

      Result

      Proceed to

      MIL does not illuminate

      A

      MIL illuminates

      B
    B

    REPLACE OIL PRESSURE SENSOR

    (Click here)

    A

  10. CHECK HARNESS AND CONNECTOR

    1. Disconnect the throttle body assembly connector.

    2. Disconnect the accelerator pedal sensor assembly connector.

    3. Disconnect the camshaft position sensor (for intake camshaft) connector.

    4. Disconnect the camshaft position sensor (for exhaust camshaft) connector.

    5. Disconnect the crankshaft position sensor connector.

    6. Disconnect the manifold absolute pressure sensor connector.

    7. Disconnect the oil pressure sensor connector (for CVT Models).

    8. Disconnect the ECM connectors.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      B93-134 (VCTA) - Body ground

      Always

      10 kΩ or higher

      A62-49 (VCPA) - Body ground

      Always

      10 kΩ or higher

      A62-52 (VCP2) - Body ground

      Always

      10 kΩ or higher

      B93-116 (VCV1) - Body ground

      Always

      10 kΩ or higher

      B93-111 (VCE1) - Body ground

      Always

      10 kΩ or higher

      B93-81 (VCNE) - Body ground

      Always

      10 kΩ or higher

      B93-77 (VCPM) - Body ground

      Always

      10 kΩ or higher

      B93-110 (VCPT)* - Body ground

      Always

      10 kΩ or higher

      *: for CVT Models

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE ECM

    (Click here)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR