Inspection Procedure

1. Connect Techstream to the DLC3.
2. Start the engine and turn the tester on.
3. Select the following menu items: Powertrain / Engine and ECT / Active Test / Active the VSV for Intake Control.
4. Check the operation of the VSV when the intake air control is operated by the tester.

   OK: Operational noise can be heard. 

NG: Go to step   2 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE )

1. Disconnect the intake air control valve connector.
2. Apply battery voltage between the terminals of the air intake valve connector.
3. Check the air intake valve operation.

   OK: Operational noise can be heard. 

4. Reconnect the intake air control valve connector.
   Fig 1: Identifying Intake Air Control Valve Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE INTAKE AIR SURGE TANK  (See INTAKE MANIFOLD )

OK: Go to next step 

1. Disconnect the intake air control valve connection.
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
   2 - Body ground	Ignition switch on (IG)	9 to 14 V

4. Reconnect the intake air control valve connector.
   Fig 2: Identifying Intake Air Control Valve Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

OK: Go to next step 

1. Disconnect the intake air 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
   B28-1 - B1-33 (ACIS)	Always	Below 1 Ω

   Check for short 

   STANDARD RESISTANCE: CHECK FOR SHORT
   
   

   Tester Connection	Condition	Specified Condition
   B28-1 or B1-33 (ACIS) - Body ground	Always	10 kΩ or higher

4. Reconnect the intake air control valve connector.
5. Reconnect the ECM connector.
Fig 3: Identifying Harness & Connector (Intake Air Control Valve - ECM)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

OK: REPLACE ECM  (See REMOVAL  )