Inspection Procedure

1. Disconnect the vacuum hose from the port F on the VSV for ACIS.
   Fig 1: Checking Vacuum Switching Valve Air Flow

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
3. Start the engine.
4. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / INTAKE CTL VSV1. Operate the VSV (for ACIS).
5. Check the VSV's air flow when switching the VSV.

   OK 

   TESTER CONDITION SPECIFIED CONDITION REFERENCE CHART
   
   

   Tester Condition	Specified Condition
   VSV is ON	Air from port E flows out through port F
   VSV is OFF	Air from port E flows out through air filter

NG: Go to step  4

OK: Go to next step 

1. Check the condition of the vacuum hoses between the intake manifold, VSV for ACIS and IACV.
   1. The vacuum hoses are connected securely.
   2. Vacuum hoses are not cranked or damaged.

      OK: 

      The vacuum hoses are connected securely and not cracked or damaged. 

NG: REPAIR OR REPLACE VACUUM HOSES 

OK: Go to next step 

1. Inspect the intake air control valve (see INTAKE AIR CONTROL VALVE ACTUATOR ).

NG: REPLACE INTAKE AIR CONTROL VALVE 

OK: REPLACE ECM 

1. Check that air flows from port E to the air filter.
   Fig 2: Checking Vacuum Switching Valve (Operation)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Apply positive (+) battery voltage across the terminals.
3. Check that air flows from port E to port F.

NG: REPLACE VACUUM SWITCHING VALVE 

OK: Go to next step 

1. Disconnect the V2 VSV for ACIS connector.
2. Disconnect the E4 ECM connector.
   Fig 3: Disconnecting E4 ECM Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   V2-2 - E4-3 (ACIS)	Below 1 Ω
   V2-2 or E4-3 (ACIS) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

Fig 4: Inspecting EFI Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the EFI relay from the engine room No. 2 relay block.
2. Measure the resistance of the EFI relay.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   3 - 5	10 kΩ or higher
   3 - 5	Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

NG: REPLACE EFI RELAY 

OK: REPLACE ECM