Hand-held tester:

PERFORM ACTIVE TEST BY HAND-HELD TESTER (OPERATE VSV FOR ACIS)
1. Disconnect the vacuum hose.
2. Connect the hand-held tester to the DLC3.
3. Turn the ignition switch to ON and turn the hand-held tester ON.
4. Select the item: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / INTAKE CTL VSV1. Operate the VSV for AICS.
5. Check the VSV operation when it is operated by the hand-held tester.
  Standard:
  
  Fig 1: VSV Specified Condition Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 2: Checking Air Flow In VSV
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Reconnect the vacuum hose.
OK: Go to step 4

NG: Go to next step.
CHECK VSV FOR ACIS (OPERATION)
1. Check that air flows from port E to the air filter.
  
  Fig 3: Checking Air Flows From Port E To Air Filter
  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.
  
  Fig 4: Applying Positive Battery Voltage Across Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE VSV FOR ACIS

OK: GO TO NEXT STEP.
CHECK HARNESS AND CONNECTOR (VSV FOR ACIS - ECM, VSV FOR ACIS - EFI RELAY)
1. Check the wire harness between the VSV for ACIS connector and the ECM connector.
  1. Disconnect the V1 VSV for ACIS connector.
  2. Disconnect the E10 ECM connector.
  3. Check the resistance between the wire harness side connectors.
    Standard (Check for open):
    
    Fig 5: VSV For ACIS And ECM Terminals Specified Condition Chart (Check For Open)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Standard (Check for short):
    
    Fig 6: VSV For ACIS And ECM Terminals Specified Condition Chart (Check For Short)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Reconnect the VSV for ACIS connector.
    
    Fig 7: Identifying VSV For ACIS Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. Reconnect the ECM connector.
    
    Fig 8: Disconnecting E10 ECM Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the wire harness between the VSV for ACIS and the EFI relay.
  1. Disconnect the V1 VSV for ACIS connector.
  2. Remove the EFI relay from the engine room J/B.
  3. Check the resistance between the wire harness side connectors.
    Standard (Check for open):
    
    Fig 9: VSV For ACIS And EFI Relay Terminals Specified Condition Chart (Check For Open)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Reconnect the VSV for ACIS connector.
  5. Reinstall the EFI relay.
    
    Fig 10: Identifying EFI Relay Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP.
CHECK VACUUM HOSES (INTAKE MANIFOLD - INTAKE AIR CONTROL VALVE, INTAKE AIR CONTROL VALVE - VSV FOR ACIS)
1. Check that the vacuum hoses are connected correctly.
2. Check that the vacuum hoses are not loose or disconnected.
3. Check the vacuum hoses for cracks, holes or damage.
NG: REPAIR OR REPLACE VACUUM HOSES

OK: GO TO NEXT STEP.
INSPECT INTAKE AIR CONTROL VALVE (See INSPECTION )
NG: REPLACE INTAKE AIR CONTROL VALVE

OK: REPLACE ECM (See ECM (3MZ-FE) )