Hand-held tester:

Connect hand-held tester, and check operation of VSV for ACIS.
PREPARATION:
1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch ON and push the hand-held tester main switch ON.
3. Select the ACTIVE TEST mode on the hand-held tester.
CHECK:

Check operation of the VSV when the VSV is operated by the hand-held tester.

Fig 1: Checking Operation Of VSV For ACIS
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK:

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.
1. OK: Go to step 4 .
2. NG: Go to next step
Check VSV for ACIS (See INSPECTION ).
1. NG: Replace VSV for ACIS.
2. OK: Go to next step
Check for open and short in harness and connector between EFI main relay (Marking: EFI) and ECM (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
1. NG: Repair or replace harness or connector.
2. OK: Go to next step
Check vacuum hoses between intake manifold and intake air control valve.
CHECK:

Check that the vacuum hoses are:
- Connected correctly.
- Are not loose or disconnected.
- Do not have cracks, holes or damages.
1. NG: Repair or replace vacuum hose.
2. OK: Go to next step
Check intake air control valve (See ON-VEHICLE INSPECTION ).
1. NG: Replace intake air control valve.
2. OK: Go to next step
  Replace ECM (See ENGINE CONTROL MODULE (ECM) ).