Inspection Procedure

1. Disconnect the vacuum hose from port F on the vacuum switching valve (for ACIS).
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 ACIS VSV.
5. Check the VSV air flow when switching the VSV.

   OK 

   TESTER CONNECTION SPECIFIED CONDITION 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 the air filter

NG:  GO TO step  4

Fig 1: Checking Vacuum Switching Valve

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 ON-VEHICLE 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.
3. Check that air flows from port E to port F.

NG: REPLACE VACUUM SWITCHING VALVE 

Fig 2: Checking Vacuum Switching Valve (Operation)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO next step 

1. Check the wire harness between the VSV for ACIS and connector the ECM connector.
   1. Disconnect the V14 VSV for ACIS connector.
   2. Disconnect the E6 and E8 ECM connector.
   3. Measure the resistance between the wire harness side connectors.

      Standard resistance (Check for open) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified condition
      VSV for ACIS (V14-2) - ACIS (E8-33)	Below 1 Ω

      Standard resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified condition
      VSV for ACIS (V14-2) or ACIS (E8-33) -E1 (E6-1)	10 kΩ or higher

2. Check the wire harness between the VSV for ACIS connector and the EFI relay.
   1. Disconnect the V14 VSV for ACIS connector.
   2. Remove the EFI relay from the engine room relay block.
   3. Measure the resistance between the wire harness side connectors.
      Fig 3: Identifying V14 VSV For ACIS And ECM Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance (Check for open) 

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE ECM