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 | .gif) |
GO TO STEP 4 |
|
.gif)
|
2. |
CHECK VACUUM HOSES (VACUUM SWITCHING VALVE - INTAKE AIR CONTROL VALVE, INTAKE MANIFOLD) |
(a) Check the vacuum hoses (See page .gif)
).
| NG | |
REPAIR OR REPLACE VACUUM HOSES |
|
|
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 |
|
|
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) |
|
|
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:
Installation
INSTALLATION
PROCEDURE
1. INSTALL REAR ENGINE OIL SEAL
(a) Apply MP grease to the lip of a new oil seal.
NOTICE:
Do not allow foreign matter to contact the lip of the oil seal.
Do not allow MP grease to contact the dust seal.
...
Removal
REMOVAL
PROCEDURE
1. PRECAUTION
CAUTION:
Be sure to read Precaution thoroughly before servicing (See page
).
If the front seat side airbag assembly was deployed, replace the front
seat side airbag assembly, front seat frame assembly wit ...
Inspection
INSPECTION
PROCEDURE
1. INSPECT BRAKE DISC INSIDE DIAMETER
(a) Using a brake drum gauge or an equivalent tool, measure the inside
diameter of the disc.
Standard inside diameter of a new disc:
190 mm (7.48 in.)
Maximum inside diamete ...
0.1328