ACIS Control Circuit: Procedure

1. Connect Techstream to the DLC3.
2. Start the engine and turn the tester on.
3. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for Intake Control.
4. Check if operating noise can be heard when operating the intake control valve using Techstream.

   OK

   Operating noise can be heard.

OK → CHECK FOR INTERMITTENT PROBLEMS 

NG: Go to next step 

1. Disconnect the E50 VSV ACIS connector.
   Fig 1: Identifying VSV ACIS Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Apply battery voltage between the terminals of the air intake valve connector.
3. Check air intake valve operation.

   OK

   Operating noise can be heard.

4. Reconnect the VSV ACIS connector.

NG → REPLACE INTAKE AIR SURGE TANK 

OK: Go to next step 

1. Check the wire harness between the intake air control connector and the ECM connector.
   1. Disconnect the E50 VSV ACIS connector.
   2. Disconnect the E5 ECM connector.
   3. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open)

      Tester Connection	Specified Condition
      VSV ACIS (E50-2) - ACIS (E5-3)	Below 1 Ω

      Standard resistance (Check for short)

      Tester Connection	Specified Condition
      VSV ACIS (E50-2) or ACIS (E5-3) - Body ground	10 kΩ or higher

   4. Reconnect the ECM connector.
2. Check the wire harness between the VCV ACIS connector and the EFI No. 2 fuse.
   1. Remove the EFI No. 2 fuse from the engine room R/B No. 2.
   2. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open)

      Tester Connection	Specified Condition
      VCV ACIS (E50-1) - EFI No. 2 fuse (2) of Engine room No. 2 relay block	Below 1 Ω

   3. Reinstall the EFI No. 2 fuse.
   4. Reconnect the VSV ACIS connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   4