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 |
Certification Ecu
Components
COMPONENTS
ILLUSTRATION
Removal
REMOVAL
PROCEDURE
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-)
battery terminal to disable the SRS system.
N ...
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" column ...
Wireless Door Lock Tuner Circuit Malfunction (B1242)
DESCRIPTION
The door control receiver receives signals from the transmitter and sends these
signals to the main body ECU (driver side junction block assembly).
DTC No.
DTC Detection Condition
Trouble Area
B ...