Toyota RAV4 manuals

Toyota Sienna Service Manual: Air Intake Control Circuit

DESCRIPTION

The air cleaner is equipped with two inlets, one of which is opened or closed by the Air Intake Control Valve (AICV). This system reduces intake noise and increases engine power at low-to-high engine speed range.

When the engine is operating in the low-to-mid speed range, this control operates the AICV to close one of the air cleaner inlets. When the engine speed is more than 3600 rpm and the opening angle of the throttle valve is more than 60, the ECM activates the VSV and opens the AICV.

DESCRIPTION

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 PERFORM ACTIVE TEST BY INTELLIGENT TESTER (VSV FOR AICV)

PERFORM ACTIVE TEST BY INTELLIGENT TESTER

  1. Turn the ignition switch to the ON position and turn the intelligent tester on.
  2. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / INTAKE CTL VSV1 and operate the VSV for AICV.
  3. Check the operation of the VSV when the VSV is operated by the intelligent tester.

Standard

Standard

2 CHECK VSV (FOR AICV)

  1. Inspect the intake air control valve assembly

3 CHECK HARNESS AND CONNECTOR (VSV FOR AICV - ECM)

CHECK HARNESS AND CONNECTOR

  1. Check the wire harness between the VSV for AICV connector and the ECM connector.
  1. Disconnect the V2 VSV for AICV connector.
  2.  Disconnect the E9 ECM connector.
  3.  Measure the resistance according to the value(s) in the table below.

Standard resistance: Check for open

Standard resistance

Check for short

Standard resistance

  1. Reconnect the ECM connector

4 INSPECT FUSE (EFI NO. 2 FUSE)

INSPECT FUSE

  1. Check the EFI No. 2 fuse.
  1.  Remove the EFI No. 2 fuse from the engine room junction block.
  2.  Measure the EFI No. 2 fuse resistance.

    Standard resistance: Below 1 Ω

  3.  Reinstall the EFI No. 2 fuse.

5 CHECK HARNESS AND CONNECTOR (VSV FOR AICV - EFI RELAY)

CHECK HARNESS AND CONNECTOR

  1. Check the wire harness between the VSV for AICV and the EFI relay.
  1. Remove the EFI relay from the engine room junction block.
  2.  Measure the resistance according to the value(s) in the table below.

Standard resistance : Check for open

Standard resistance

  1. Reconnect the VSV for AICV connector.
  2. Reinstall the EFI relay.

6 INSPECT VACUUM TANK

  1. Inspect the vacuum tank

CHECK ECM POWER SOURCE CIRCUIT

ACIS Control Circuit
DESCRIPTION This circuit opens and closes the Intake Air Control Valve (IACV) in response to changes in the engine load in order to increase the intake efficiency (ACIS: Acoustic Control Inducti ...

MIL Circuit
DESCRIPTION The MIL (Malfunction Indicator Lamp) is used to indicate vehicle malfunctions detected by the ECM. When the ignition switch is turned to the ON position, power is supplied to the M ...

Other materials:

Display contents
The multi-information display presents the driver with a variety of vehicle data. Menu icons Displays the following information when an icon is selected. Some of the information may be displayed automatically depending on the situation. Drive information Select to display various ...

Accelerator pedal rod
COMPONENTS ON-VEHICLE INSPECTION 1. CHECK ACCELERATOR PEDAL ROD (a) Check the voltage. (1) Connect the intelligent tester to the DLC3. (2) Turn the ignition switch to the ON position. (3) Turn the intelligent tester on. (4) Select the menu items: DIAGNOSIS / ENHANCED OBD II / D ...

Removal
1. REMOVE CENTER REAR SEAT LAP TYPE BELT ASSEMBLY (for 8-Passenger) HINT: Refer to the instructions for disassembly of the rear No. 1 seat assembly (for center seat).  Remove the bolt and center seat lap type belt assembly. 2. REMOVE CENTER REAR NO. 2 SEAT LAP BELT ASSEMBLY WITH I ...

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