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Toyota Sienna Service Manual: Air Intake Control Circuit

Toyota Sienna Service Manual / 2GR-FE Engine control system / SFI system / Diagnostic trouble code chart / 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:

Precaution
1. INITIALIZATION NOTICE: Perform RESET MEMORY (AT initialization) when replacing the automatic transaxle assembly, engine assembly or ECM (See page AX-16). Perform REGISTRATION (VIN registration) when replacing the ECM (See page ES-15). HINT: Initializatio ...

High Temperature
DTC 58-45 High Temperature DTC 80-45 High Temperature DESCRIPTION DTC No. DTC Detection Condition Trouble Area 58-45 High map disc player temperature is detected (Over 80C). Radio and navigation assembly 80-45 High map disc player tem ...

CD Sound Skips
INSPECTION PROCEDURE 1 CHECK CD Check the CD. OK: The CD is clean. HINT: If dirt is on the CD surface, wipe it clean with a soft cloth from the inside to the outside in a radial direction. NOTICE: Do not use a conventional record cleaner or antistatic preservative. 2 CHECK CD ...

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