Inspection Procedure

1. Disconnect the vacuum hose.
2. Connect an intelligent tester to the DLC3.
3. Turn the ignition switch ON and turn the tester ON.
4. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / INTAKE CTL VSV1. Operate the VSV for ACIS.
5. Check the VSV operation when it is operated using an intelligent tester.

   OK 

   TESTER OPERATIONS AND SPECIFIED CONDITIONS
   
   

   Tester Operations	Specified Conditions
   VSV ON	Air from port E flows out through port F
   VSV OFF	Air from port E flows out through air filter

   Fig 1: Identifying 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 To Air Filter

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: 

   Air from port E flows out through the air filter. 

2. Apply the battery positive voltage across the terminals.
   Fig 3: Applying Positive Battery Voltage Across Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check that air flows from port E to port F.

   OK: 

   Air from port E flows out through port F. 

NG: REPLACE VSV FOR ACIS  (See REMOVAL )

OK: Go TO NEXT STEP 

1. Check the wire harness and connectors between the VSV for ACIS and ECM.
   1. Disconnect the B17 VSV for ACIS connector.
   2. Disconnect the B1 ECM connector.
   3. Check the resistance.

      Standard Resistance (Check for open) 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS
      
      

      Tester Connections	Specified Conditions
      VSV for ACIS (B17-2) - ACIS (B1 -33)	Below 1 Ω

      Standard Resistance (Check for short) 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS
      
      

      Tester Connections	Specified Conditions
      VSV for ACIS (B17-2) or ACIS (B1-33) - Body ground	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 B17 VSV for ACIS connector.
      Fig 4: Identifying B17 VSV & B1 ECM Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Remove the EFI relay from the engine room R/B.
   3. Check the resistance.

      Standard Resistance (Check for open) 

      TESTER CONNECTIONS AND SPECIFIED CONDITIONS
      
      

      Tester Connections	Specified Conditions
      VSV for ACIS (B17-1) - EFI relay terminal 3 of R/B	Below 1 Ω

   4. Reconnect the VSV for ACIS connector.
   5. Reinstall the EFI relay.

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 

Fig 5: Identifying Intake Air Control Valve (Intake Air Surge Tank)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check that the lever moves when a vacuum of 26.6 kPa (200 mmHg) is applied with the vacuum gauge on.

   OK: 

   Lever moves 

2. Check that the vacuum of 26.6 kPa (200 mmHg) is sustained for 1 minute in the above state.

   OK: 

   Vacuum is sustained 

NG: REPLACE INTAKE AIR CONTROL VALVE (INTAKE AIR SURGE TANK) 

OK: REPLACE ECM  (See REMOVAL  )