Air Intake Control Circuit: Procedure

1. Disconnect the vacuum hose (Port F) from the vacuum switching valve (for air intake control valve).
   Fig 1: Operating Vacuum Switching Valve (Using Techstream)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect the Techstream to the DLC3.
3. Start the engine.
4. Turn the Techstream on.
5. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for AICS.
6. Check the operation of the vacuum switching valve (for air intake control valve) when the vacuum switching valve (for air intake control valve) 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

   TEXT IN ILLUSTRATION
   
   

   *1	Air
   *2	Port E
   *3	Port F
   *4	Air Filter
   *a	Vacuum Switching Valve is On
   *b	Vacuum Switching Valve is Off

NG → See step   2 

OK → See step   10 

1. Inspect the vacuum switching valve for air intake control valve. Refer to INSPECTION [06/2012 - ] .

NG → See step   9 

OK: Go to next step 

1. Disconnect the vacuum switching valve (for air intake control valve) connector.
   Fig 2: Identifying A9 Vacuum Switching Valve (For Air Intake Control Valve) Connector

   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	Condition	Specified Condition
   A9-1 - 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 → See step   7 

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

   Tester Connection	Condition	Specified Condition
   A9-2 - D23-46 (AICV)	Always	Below 1 Ω
   A9-2 or D23-46 (AICV) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Inspect the vacuum surge tank. Refer to ON-VEHICLE INSPECTION [06/2012 - ] .

NG → REPAIR OR REPLACE AIR CLEANER CAP SUB-ASSEMBLY 

OK: Go to next step 

1. Check the vacuum hoses between vacuum switching valve (for air intake control valve), air cleaner cap sub-assembly and air intake control valve. Refer to ON-VEHICLE INSPECTION [06/2012 - ] - Step 1 .

NG → REPAIR OR REPLACE VACUUM HOSE 

OK → See step   8 

1. Remove the No. 1 integration relay from the engine room relay block and junction block assembly.
2. Disconnect the vacuum switching valve (for air intake control valve) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1C-3 - A9-1	Always	Below 1 Ω
   1C-3 or A9-1 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   11