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 |
|
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 |
|
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 |
Installation
INSTALLATION
PROCEDURE
1. INSTALL SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY
NOTICE:
Do not replace the spiral cable with the battery connected and the ignition
switch on (IG).
Do not rotate the spiral cable with the battery connected and the ig ...
4wd Control Ecu
Components
COMPONENTS
ILLUSTRATION
Removal
REMOVAL
PROCEDURE
1. REMOVE FRONT DOOR SCUFF PLATE RH
2. REMOVE COWL SIDE TRIM SUB-ASSEMBLY RH
3. REMOVE NO. 2 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY
4. REMOVE LOWER INSTRUMENT PANEL SUB-ASSEMBLY
...
Inspection
INSPECTION
PROCEDURE
1. INSPECT FRONT LOWER BALL JOINT
(a) Inspect the turning torque of the ball joint.
(1) Secure the front lower ball joint in a vise using aluminum plates.
(2) Install the nut to the front lower ball joint stud.
(3) U ...