Toyota Sienna Quiz
2GR-FE Engine control system

VC Output Circuit

In this manual: 2GR-FE Engine control system
Introduction — 55Service specifications — 7Maintenance — 7Engine — 264U151e automatic transaxle — 108Transfer — 19Propeller shaft — 8Drive shaft — 14Differential — 16Axle — 18Suspension — 37Tire and wheel — 54Brake control — 141Parking brake — 16Steering Column — 11Power steering — 18Air conditioning — 106Supplemental restraint system — 146Seat belt — 22Theft deterrent — 14Engine immobiliser — 17Cruise control — 65Lighting — 61Wiper and washer — 13Door lock — 42Meter — 28Audio / visual — 94Navigation — 108Park assist / monitoring — 33Horn — 5Garage door opener — 42GR-FE Engine control system — 126Supplemental restraint system — 147Other system — 14Windshield / windowglass — 43Mirror — 23Instrument panel — 6Seat belt — 22Seat — 92Engine hood / door — 104Exterior — 39Interior — 5Sliding roof — 9Multiplex communication — 18Can communication — 23
41steps
~246min
4/5difficulty
Done 0 of 41

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.

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.

HINT: Under normal conditions, the MIL is illuminated for several seconds when the ignition switch is first turned to the ON position. The MIL goes off when the engine is started.

DESCRIPTION

WIRING DIAGRAM

WIRING DIAGRAM
WIRING DIAGRAM

INSPECTION PROCEDURE

1 CHECK MIL

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

OK: MIL lights up.

2 CHECK CONNECTION BETWEEN INTELLIGENT TESTER AND ECM

  1. Connect the intelligent tester to the DLC3.
  2. Turn the ignition switch to the ON position and turn the tester on.
  3. Check the communication between the tester and ECM.

Result

Result

3 CHECK THROTTLE BODY (CHECK MIL ILLUMINATED)

  1. Disconnect the throttle body connector.
  2. Turn the ignition switch to the ON position.
  3. Check the MIL.

Result

Result
  1. Reconnect the throttle body connector.

4 CHECK ACCELERATOR PEDAL ROD (CHECK MIL ILLUMINATED)

  1. Disconnect the accelerator pedal position sensor connector.
  2. Turn the ignition switch to the ON position.
  3. Check the MIL

Result

Result
  1. Reconnect the accelerator pedal position sensor connector.

5 CHECK VVT SENSOR FOR INTAKE CAMSHAFT BANK 1 (CHECK MIL ILLUMINATED)

  1. Disconnect the VVT sensor for intake camshaft bank 1 connector.
  2. Turn the ignition switch to the ON position.
  3. Check the MIL.

Result

Result
  1. Reconnect the VVT sensor for intake camshaft bank 1 connector.

6 CHECK VVT SENSOR FOR EXHAUST CAMSHAFT BANK 1 (CHECK MIL ILLUMINATED)

  1. Disconnect the VVT sensor for exhaust camshaft bank 1 connector.
  2. Turn the ignition switch to the ON position.
  3. Check the MIL.

Result

Result
  1. Reconnect the VVT sensor for exhaust camshaft bank 1 connector

7 CHECK VVT SENSOR FOR INTAKE CAMSHAFT BANK 2 (CHECK MIL ILLUMINATED)

  1. Disconnect the VVT sensor for intake camshaft bank 2 connector.
  2. Turn the ignition switch to the ON position.
  3. Check the MIL.

Result

Result
  1. Reconnect the VVT sensor for intake camshaft bank 2 connector.

8 CHECK VVT SENSOR FOR EXHAUST CAMSHAFT BANK 2 (CHECK MIL ILLUMINATED)

  1. Disconnect the VVT sensor for exhaust camshaft bank 2 connector.
  2. Turn the ignition switch to the ON position.
  3. Check the MIL.

Result

Result
  1. Reconnect the VVT sensor for exhaust camshaft bank 2 connector.

9 CHECK CHARCOAL CANISTER ASSEMBLY (CHECK MIL ILLUMINATED)

  1. Disconnect the canister pump module connector.
  2. Turn the ignition switch to the ON position.
  3. Check the MIL.

Result

Result
  1. Reconnect the canister pump module connector.

10 CHECK HARNESS AND CONNECTOR

CHECK HARNESS AND CONNECTOR
  1. Disconnect the throttle body connector.
  2. Disconnect the accelerator pedal position sensor connector.
  3. Disconnect the VVT sensor for intake camshaft bank 1 connector.
  4. Disconnect the VVT sensor for exhaust camshaft bank 1 connector.
  5. Disconnect the VVT sensor for intake camshaft bank 2 connector.
  6. Disconnect the VVT sensor for exhaust camshaft bank 2 connector.
  7. Disconnect the canister pump module connector.
  8. Disconnect the E9 and E4 ECM connectors.
  9. Measure the resistance according to the value(s) in the table below.

Standard resistance (Check for short)

Standard resistance
  1. Reconnect the ECM connectors.
  2. Reconnect the canister pump module connector.
  3. Reconnect the VVT sensor for exhaust camshaft bank 2 connector.
  4. Reconnect the VVT sensor for intake camshaft bank 2 connector.
  5. Reconnect the VVT sensor for exhaust camshaft bank 1 connector.
  6. Reconnect the VVT sensor for intake camshaft bank 1 connector.
  7. Reconnect the accelerator pedal position sensor connector.
  8. Reconnect the throttle body connector.

REPLACE ECM

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