Inspection Procedure

1. Disconnect the vacuum hose.
2. Connect the Techstream to the DLC3.
3. Turn the ignition switch on and turn the tester on.
4. Enter the following menus: Powertrain / Engine and ECT / Active the VSV for Intake Control. Operate the VSV for AICS.
5. Check the VSV operation when it is operated using the Techstream.

   Standard 

   TESTER OPERATION AND SPECIFIED CONDITION TABLE
   
   

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

   Fig 1: Checking VSV Operation

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Reconnect the vacuum hose.

OK:  Go to step  4

NG: Go to Next Step. 

1. Check that air flows from port E to the air filter.
   Fig 2: Checking If Air Flows From Port E ToAir Filter

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Apply battery voltage across the terminals.
3. Check that air flows from port E to port F.
   Fig 3: Checking If Air Flows From Port E To Port F

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE VACUUM SWITCHING VALVE 

OK: Go to Next Step. 

1. Check the wire harness and connectors between the VSV for ACIS and ECM.
   1. Disconnect the V1 VSV for ACIS connector.
   2. Disconnect the E4 ECM connector.
   3. Measure the resistance between the terminals of the VSV for ACIS connector and ECM connector.

      Standard resistance (Check for open) 

      RESISTANCE SPECIFICATION TABLE
      
      

      Tester Connections	Specified Conditions
      VSV for ACIS (V1-2) - ACIS (E4-33)	Below 1 Ω

      Standard resistance (Check for short) 

      RESISTANCE SPECIFICATION TABLE
      
      

      Tester Connections	Specified Conditions
      VSV for ACIS (V1-2) or ACIS (E4-33) - E1 (E6-1)	10 kΩ or higher

   4. Reconnect the VSV for ACIS connector.
   5. Reconnect the ECM connector.
2. Check the wire harness between the VSV for ACIS and EFI relay.
   1. Disconnect the V1 VSV for ACIS connector.
   2. Remove the EFI fuse from the engine room R/B and J/B.
   3. Measure the resistance of the VSV for ACIS connector and engine room R/B (EFI fuse).

      Standard resistance (Check for open) 

      RESISTANCE SPECIFICATION TABLE
      
      

      Tester Connections	Specified Conditions
      VSV for ACIS (V1-1) - EFI relay (3)	Below 1 Ω

   4. Reconnect the VSV for ACIS connector.
   5. Reinstall the EFI fuse.
   Fig 4: Identifying ACIS VSV, ECM & EFI Relay Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step. 

1. Check that the vacuum hose is connected correctly.
2. Check the vacuum hose for looseness and disconnection.
3. Check the vacuum hose for cracks, holes and damage.

NG: REPAIR OR REPLACE VACUUM HOSES 

OK: Go to Next Step. 

NG: REPLACE INTAKE AIR SURGE TANK 

OK: REPLACE ECM