Toyota Venza manuals

Toyota Venza: ACIS Control Circuit

DESCRIPTION

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


WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE VSV FOR ACIS)

(a) Disconnect the vacuum hose from port F on the vacuum switching valve (for ACIS).


(b) Connect the Techstream to the DLC3.

(c) Start the engine.

(d) Enter the following menus: Powertrain / Engine / Active Test / Active the VSV for Intake Control.

(e) Operate the VSV for ACIS.

(f) Check the VSV air flow when switching the VSV on and off.

OK:

Test Condition

Specified Condition

VSV is ON

Air from port E flows out through port F

VSV is OFF

Air from port E flows out through air filter


NG

GO TO STEP 4


OK

2.

CHECK VACUUM HOSES (VACUUM SWITCHING VALVE - INTAKE AIR CONTROL VALVE, INTAKE MANIFOLD)

(a) Check the vacuum hoses (See page ).



NG

REPAIR OR REPLACE VACUUM HOSES


OK

3.

INSPECT INTAKE MANIFOLD (INTAKE AIR CONTROL VALVE)

(a) Inspect the intake air control valve (See page ).



OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

REPLACE INTAKE MANIFOLD

4.

INSPECT VACUUM SWITCHING VALVE (VSV FOR ACIS)

(a) Inspect the vacuum switching valve (See page ).



NG

REPLACE VACUUM SWITCHING VALVE


OK

5.

CHECK HARNESS AND CONNECTOR (VSV FOR ACIS VOLTAGE)

(a) Disconnect the VSV for ACIS connector.

(b) Turn the ignition switch to ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

B52-2 - Body ground

Ignition switch ON

11 to 14 V


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 3 FUSE - VSV FOR ACIS)


OK

6.

CHECK HARNESS AND CONNECTOR (VSV FOR ACIS - ECM)

(a) Disconnect the VSV for ACIS connector.

(b) Disconnect the ECM connector.

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

Standard Resistance (Check for Open):

Tester Connection

Condition

Specified Condition

B52-1 - B58-27 (ACIS)

Always

Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection

Condition

Specified Condition

B52-1 or B58-27 (ACIS) - Body ground

Always

10 kΩ or higher


OK

REPLACE ECM


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Fuel Injector Circuit
DESCRIPTION The fuel injector assemblies are located on the intake manifold. They inject fuel into the cylinders based on signals from the ECM. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: ...

Starter Signal Circuit
DESCRIPTION 1. w/o Smart Key System While the engine is being cranked, current flows from terminal ST1 of the ignition switch assembly to the park/neutral position switch assembly and also flows t ...

Other materials about Toyota Venza:

Stereo Jack Adapter Assembly
Components COMPONENTS ILLUSTRATION Removal REMOVAL PROCEDURE 1. REMOVE UPPER CONSOLE PANEL SUB-ASSEMBLY (w/o Seat Heater System) 2. REMOVE UPPER CONSOLE PANEL SUB-ASSEMBLY (w/ Seat Heater System) 3. REMOVE NO. 2 CONSOLE BOX CARPET 4. RE ...

Tongue Plate Stopper
Components COMPONENTS ILLUSTRATION Replacement REPLACEMENT PROCEDURE 1. REMOVE TONGUE PLATE STOPPER (a) Slide the tongue plate above the installation position of the tongue plate stopper, and temporarily hold it with adhesive tape. ...

Window Defogger Wire
On-vehicle Inspection ON-VEHICLE INSPECTION PROCEDURE 1. CHECK REAR WINDOW DEFOGGER SYSTEM OPERATION (a) When the ignition switch is turned to ON and the rear window defogger switch is pressed, check that the rear window defogger system operates. 2. I ...

© 2016-2025 Copyright www.tovenza.com

0.1721