Air Intake Control Circuit: Procedure

1. Connect the Techstream to the DLC3.
   Fig 1: Operation Of The VSV

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for AICS.
5. Check the operation of the VSV when the VSV is operated using the Techstream.

   Standard

   Techstream Operation	Specified Condition
   ON	Air from port E flows out through port F
   OFF	Air from port E flows out through the air filter

NG → See step   2 

OK → See step   7 

1. Check the vacuum switching valve for air intake control valve. Refer to ON-VEHICLE INSPECTION .

NG → REPLACE VACUUM SWITCHING VALVE (FOR AIR INTAKE CONTROL VALVE) 

OK: Go to next step 

1. Disconnect the vacuum switching valve for air intake control valve connector.
   Fig 2: Vacuum Switching Valve

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the engine switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A14-1 - Body ground	Engine switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Vacuum Switching Valve for Air Intake Control Valve)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 2 FUSE - VACUUM SWITCHING VALVE) 

OK: Go to next step 

1. Disconnect the vacuum switching valve for air intake control valve 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
   A14-2 - D1-61 (AICV)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   A14-2 or D1-61 (AICV) - Body ground	Always	10 kΩ or higher

4. Reconnect the ECM connector.
5. Reconnect the vacuum switching valve for air intake control valve connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (VACUUM SWITCHING VALVE FOR AIR INTAKE CONTROL VALVE - ECM) 

OK: Go to next step 

1. Inspect the vacuum surge tank. Refer to ON-VEHICLE INSPECTION .

NG → REPAIR OR REPLACE AIR CLEANER CAP SUB-ASSEMBLY 

OK → See step   6