ACIS Control Circuit: Procedure

1. Disconnect the vacuum hose from port F on the vacuum switching valve (for ACIS).
   Fig 1: Identifying VSV ON And OFF Position

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2. Connect the Techstream to the DLC3.
3. Start the engine.
4. Enter the following menus: Powertrain / Engine / Active Test / Active the VSV for Intake Control.
5. Operate the VSV for ACIS.
6. 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 → See step   5 

OK: Go to next step 

1. Check the vacuum hoses, refer to ON-VEHICLE INSPECTION .

NG → REPAIR OR REPLACE VACUUM HOSES 

OK: Go to next step 

1. Inspect the intake air control valve, refer to INSPECTION .

NG → See step   9 

OK → See step   4 

1. Inspect the VSV for ACIS, refer to INSPECTION .

NG → See step   10 

OK: Go to next step 

1. Disconnect the VSV for ACIS connector.
2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   B58-2 - Body ground	Ignition switch ON	11 to 14 V

4. Reconnect the VSV for ACIS connector.

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

OK: Go to next step 

1. Disconnect the VSV for ACIS connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   B58-1 - B51-27 (ACIS)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   B58-1 or B51-27 (ACIS) - Body ground	Always	10 kΩ or higher

4. Reconnect the VSV for ACIS connector.
5. Reconnect the ECM connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   8