Inspection Procedure

1. Turn the ignition switch ON and push the intelligent tester main switch ON.
2. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / INTAKE CTL VSV1. Operate the VSV.
3. Check the operation of the VSV when the VSV is operated by the intelligent tester.

   Standard 

   TESTER OPERATION SPECIFIED CONDITION
   
   

   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

OK: Go to step  4

Fig 1: Checking Operation Of VSV

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to Next Step 

NG: REPLACE INTAKE AIR CONTROL VALVE ASSEMBLY NO. 3 

OK: Go to Next Step 

1. Check the wire harness between the VSV and ECM.
   Fig 2: Checking Wire Harness (VSV For IAC Valve No. 3 - ECM, EFI Relay)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the VSV connector for AICV.
   2. Disconnect the ECM connector.
   3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      V4-2-AICV (E8-27)	Below 1 Ω
      V4-2 or AICV (E8-27) - Body ground	10 kΩ or higher

2. Check the wire harness between the VSV and the EFI relay.
   Fig 3: Checking Wire Harness Between VSV And EFI Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the VSV connector for AICV.
   2. Remove the EFI relay from the engine room J/B.
   3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      V4-1 (VSV for AICV) - J/B EFI relay terminal 3	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step 

NG: REPLACE VACUUM TANK 

OK: REPLACE ECM