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 ...
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Reassembly
REASSEMBLY
CAUTION / NOTICE / HINT
HINT:
Perform "Inspection After Repair" after replacing the piston or piston ring (See
page ).
PROCEDURE
1. INSTALL STUD BOLT
NOTICE:
If a stud bolt is deformed or the threads are damaged, replace it.
(a) ...
Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor) (P0327,P0328)
DESCRIPTION
Flat-type knock sensors (non-resonant type) have structures that can detect vibrations
between approximately 5 and 15 kHz.
Knock sensors are fitted onto the engine block to detect engine knocking.
The knock sensor contains a piezoelectric elem ...
Removal
REMOVAL
PROCEDURE
1. REMOVE REAR DOOR SCUFF PLATE LH
2. REMOVE REAR DOOR OPENING TRIM WEATHERSTRIP LH
3. REMOVE TONNEAU COVER ASSEMBLY (w/ Tonneau Cover)
4. REMOVE DECK BOARD ASSEMBLY
5. REMOVE NO. 3 DECK BOARD SUB-ASSEMBLY
6. REMOVE DECK ...
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