Inspection Procedure

Hand-held tester:

Connect hand-held tester, and check operation of VSV for ACIS.
PREPARATION:
1. Remove the fuse cover on the instrument panel.
2. Connect the hand-held tester to the DLC3.
3. Turn the ignition switch ON and hand-held tester main switch ON.
4. Select the INTAKE CTRL VSV from the ACTIVE TEST menu on the hand-held tester.
  
  Fig 1: Connecting Hand-Held Tester Operation Of VSV For Acis
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CHECK:

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

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: Check vacuum tank (See INSPECTION ).
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 PROCEDURE ).
1. NG: Repair or replace harness or connector.
2. OK: Check and replace ECM (See PROCEDURE ).

OBD II scan tool (excluding hand-held tester):

Check VSV for ACIS (See INSPECTION ).
1. NG: Replace VSV for ACIS.
2. OK: Go to next step.
Check voltage between terminals ACIS, ACI1 of ECM connector and body ground.
PREPARATION:
1. Remove the glove compartment (See ENGINE CONTROL MODULE (ECM) ).
2. Turn the ignition switch ON.
  
  Fig 2: Measuring Voltage Terminals Acis Aci1 Of ECM Connector & Body Ground
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CHECK:

Measure the voltage between terminals ACIS, ACI1 of the ECM connector and body ground.

OK:

Voltage: 9 - 14 V
1. NG: Check for open and short in harness and connector between EFI main relay (Marking: EFI) and ECM (See PROCEDURE ).
2. OK: Go to next step.
Check vacuum tank (See INSPECTION ).
1. NG: Repair or replace.
2. OK: Check and replace ECM (See PROCEDURE ).