Inspection Procedure

Fig 1: Identifying Vacuum Hose From Port F On Vacuum Switching Valve
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
1. Disconnect the vacuum hose from port F on the vacuum switching valve (for ACIS).
2. Connect the intelligent tester to the DLC3 with CAN VIM.
3. Start the engine.
4. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / INTAKE CTL VSV1. Operate the ACIS VSV.
5. Check the VSV air flow when switching the VSV.

   OK 

   TESTER OPERATION SPECIFICATION
   
   

   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 the air filter

NG:  Go to step  4

OK: Go to next step 

1. Check the condition of the vacuum hoses between the intake manifold, vacuum switching valve (for ACIS) and IACV.
   1. The vacuum hoses are connected securely.
   2. The vacuum hoses are not cracked 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 INSPECTION ).

NG: REPLACE INTAKE AIR CONTROL VALVE 

OK: REPLACE ECM 

1. Check that air flows from port E to the air filter.
2. Apply positive (+) battery voltage across the terminals.
Fig 2: Checking Vacuum Switching Valve (Operation)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
3. Check that air flows from port E to port F.

NG: REPLACE VACUUM SWITCHING VALVE 

OK: Go to next step 

1. Check the wire harness between the VSV for ACIS and connector the ECM connector.
   1. Disconnect the V9 VSV for ACIS connector.
   2. Disconnect the E5 and E7 ECM connectors.
   3. Measure the resistance between the wire harness side connectors.

      Standard resistance (Check for open) 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Specified Condition
      VSV for ACIS (V9-2) - ACIS (E5-33)	Below 1 Ω

      Standard resistance (Check for short) 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Specified Condition
      VSV for ACIS (V9-2) or ACIS (E5-33) - E1 (E7-1)	10 kΩ or higher

2. Check the wire harness between the VSV for ACIS connector and the EFI relay.
   Fig 3: Identifying V9 VSV & ACIS Connector Terminal

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
   1. Disconnect the V9 VSV for ACIS connector.
   2. Remove the EFI relay from the engine room R/B.
   3. Measure the resistance between the wire harness side connectors.

   Standard resistance (Check for open) 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   VSV for ACIS (V9-1) - EFI relay terminal 3 of R/B	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE ECM