Inspection Procedure

1. Turn the engine switch on (IG) and turn Techstream ON.
2. Select the following menu items: Powertrain / Engine / Active Test / Activate the VSV for ACIS.
3. Check the operation of the VSV when the VSV is operated by Techstream.

   Standard 

   TESTER OPERATION SPECIFIED CONDITION CHART
   
   

   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 Operation Of VSV

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK:  Go to step  4

NG: Go to next step. 

1. Inspect the intake air control valve assembly (See VACUUM SWITCHING VALVE ).

NG: REPLACE INTAKE AIR CONTROL VALVE ASSEMBLY 

OK: Go to next step. 

1. Check the wire harness between the VSV for AICV connector and the ECM connector.
   1. Disconnect the A47 VSV for AICV connector.
   2. Disconnect the A10 ECM connector.
   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for open) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      VSV for AICV (A47-2) - AICV (A10-4)	Below 1 Ω

      Standard Resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      VSV for AICV (A47-2) or AICV (A10-4) - Body ground	10 kΩ or higher

   4. Reconnect the ECM connector.
2. Check the EFI No. 3 fuse.
   1. Remove the EFI No. 3 fuse from the engine room R/B.
   2. Measure the resistance of the EFI No. 3 fuse.

      Standard Resistance: 

      Below 1 Ω 

   3. Reinstall the EFI No. 3 fuse.
3. Check the wire harness between the VSV for AICV and the EFI relay.
   1. Remove the engine room junction block from the engine room R/B.
   2. Measure the resistance between the terminals of the wire harness side connectors.

      Standard Resistance (Check for open) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      VSV for AICV (A47-1) - 1E-6	Below 1 Ω

      Fig 2: Identifying Terminals Of B47 VSV For AICV And B10 ECM Connectors

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Reconnect the VSV for AICV connector.
   4. Reinstall the engine room junction block.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step. 

1. Inspect the vacuum tank (See ON-VEHICLE INSPECTION ).

NG: REPAIR OR REPLACE AIR CLEANER CAP 

OK: REPLACE ECM (See  REMOVAL   )