Inspection Procedure

1. Disconnect the 2 hoses from the VSV for air intake control valve.
2. Turn the ignition switch on (IG) and turn the tester on.
3. Select the following menu items: Powertrain / Engine and ECT / Active Test / Activate the VSV for AICS.
4. Check the operation of the VSV when the VSV is operated by the tester.

   Standard 

   TESTER OPERATION 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: Identifying VSV ON/OFF Position

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG:  Go to step  3

OK: Go to next step 

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

NG: REPAIR OR REPLACE AIR CLEANER CAP 

OK: CHECK ECM POWER SOURCE CIRCUIT  (See ECM POWER SOURCE CIRCUIT  )

1. Inspect the VSV for AICV (See INSPECTION ).

NG: REPLACE VSV (FOR AICV)  (See VACUUM SWITCHING VALVE )

OK: Go to next step 

1. Disconnect the VSV for air intake control valve connector.
2. Turn the ignition switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION TABLE
   
   

   Tester Connection	Switch Condition	Specified Condition
   1 - Body ground	Ignition switch on (IG)	9 to 14 V

   Fig 2: Identifying Air Intake Control Valve Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 3 FUSE-VSV FOR AIR INTAKE CONTROL VALVE) 

OK: Go to next step 

1. Disconnect the VSV for air intake control valve connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance: 

   Check for open 

   STANDARD RESISTANCE: CHECK FOR OPEN
   
   

   Tester Connection	Condition	Specified Condition
   A10-2 (VSV for AICV) - B1-27 (AICV)	Always	Below 1 Ω

   Check for short 

   STANDARD RESISTANCE: CHECK FOR SHORT
   
   

   Tester Connection	Condition	Specified Condition
   A10-2 (VSV for AICV) or B1-27 (AICV) - Body ground	Always	10 kΩ or higher

4. Reconnect the ECM connector.
   Fig 3: Identifying Harness & Connector (VSV For Air Intake Control Valve - ECM)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (VSV FOR AICV - ECM) 

OK: REPLACE ECM  (See REMOVAL  )