Inspection Procedure

Hand-held tester: 

1. 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. 
2. Check VSV for ACIS (See  INSPECTION  ).  
   1. NG: Replace VSV for ACIS. 
   2. OK: Go to next step. 
3. 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): 

1. Check VSV for ACIS (See  INSPECTION  ). 
   1. NG: Replace VSV for ACIS. 
   2. OK: Go to next step. 
2. 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. 
3. Check vacuum tank (See  INSPECTION  ).  
   1. NG: Repair or replace. 
   2. OK: Check and replace ECM (See  PROCEDURE  ).