Inspection Procedure

1. Turn the engine switch on (IG) and turn the intelligent tester ON.
2. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / INTAKE CTL VSV1 and operate the VSV for AICV.
3. Check the operation of the VSV when the VSV is operated by the intelligent tester.

   Standard 

   STANDARD RESULT REFERENCE
   
   

   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: Identifying Operation Of VSV When VSV Operated

   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 INSPECTION ).

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) 

      RESISTANCE REFERENCE (CHECK FOR OPEN)
      
      

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

      Standard resistance (Check for short) 

      RESISTANCE REFERENCE (CHECK FOR SHORT)
      
      

      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) 

      RESISTANCE REFERENCE (CHECK FOR OPEN)
      
      

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

      Fig 2: Identifying A10 ECM Connector Terminals & A47 AICV VSV Connector Terminal

      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   )