Toyota RAV4 manuals

Toyota Sienna Service Manual: 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 Induction System).

When the engine speed is between 0 and 4450 rpm and the throttle valve opening angle is 60 or more, the ECM supplies current to the VSV (ON status), to close the IACV. Under other conditions, the VSV is usually OFF and the IACV is open.

DESCRIPTION

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATE VSV FOR ACIS)

  1. Connect the intelligent tester to the DLC3.
  2.  Start the engine and turn the intelligent tester on.
  3.  Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / INTAKE CTL VSV1. Operate the VSV for AICS.

OK: Operational noise can be heard.

2 CHECK INTAKE AIR CONTROL VALVE (OPERATION)

CHECK INTAKE AIR CONTROL VALVE

  1. Disconnect the V14 VSV for ACIS connector.
  2.  Apply battery voltage between the terminals of the air intake valve connector.
  3.  Check the air intake valve operation.

    OK: Operational noise can be heard.

  4.  Reconnect the VSV for ACIS connector.

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

CHECK HARNESS AND CONNECTOR

  1. Check the wire harness and connectors between the VSV for ACIS and ECM.
  1.  Disconnect the V14 VSV for ACIS 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 VSV for ACIS connector.
  2. 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 ACIS - EFI RELAY)

CHECK HARNESS AND CONNECTOR

  1. Check the wire harness between the VSV for ACIS connector and EFI relay.
  1.  Remove the EFI relay from the engine room junction block.
  2.  Disconnect the V14 VSV connector.
  3.  Measure the resistance according to the value(s) in the table below.

Standard resistance : Check for open

Standard resistance

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

CHECK ECM POWER SOURCE CIRCUIT

Cranking Holding Function Circuit
DESCRIPTION The system detects the ignition switch's starting signal (STSW) and then supplies current to the starter until the ECM judges that the engine has started successfully. The purpose is t ...

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 l ...

Other materials:

Trouble in Passenger Airbag ON / OFF Indicator
DESCRIPTION The occupant classification system detects the front passenger seat condition. It then informs a passenger of the front passenger airbag, the front seat side airbag RH and front seat belt pretensioner RH condition (activated/not activated) by the passenger airbag ON/OFF indicator. ...

Open in Rear Curtain Shield Squib RH Circuit
DTC B1631/84 Open in Rear Curtain Shield Squib RH Circuit DESCRIPTION The rear curtain shield squib RH circuit consists of the center airbag sensor assembly and the curtain shield airbag assembly RH. The circuit instructs the SRS to deploy when deployment conditions are met. DTC B1631/84 ...

Checking monitor status
The purpose of the monitor result (mode 06) is to allow access to the results for on-board diagnostic monitoring tests of specific components/systems that are not continuously monitored. Examples are catalyst, evaporative emission (EVAP) and thermostat. The monitor result allows the OBD II sc ...

В© 2011-2019 Copyright www.tsienna.net