OBDII scan tool (excluding Hand-held Tester):

CHECK VSV (FOR AICV) (See INSPECTION )
NG: REPLACE INTAKE AIR CONTROL VALVE ASSY NO.3

OK: GO TO NEXT STEP.
INSPECT ECM
1. Turn the ignition switch to ON.
2. Measure the voltage between the specified terminals of the E8 and E10 ECM connectors.
  Voltage:
  
  Fig 1: ECM Connector Terminals Voltage Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 2: Identifying ECM Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP.
INSPECT VACUUM TANK (See INSPECTION )
NG: REPAIR OR REPLACE

OK: GO TO NEXT STEP.
CHECK AND REPLACE HARNESS AND CONNECTOR (VSV FOR AICV - ECM, VSV FOR AICV - EFI RELAY)
1. Check the wire harness between the VSV for AICV connector and the ECM connector.
  1. Disconnect the V4 VSV for AICV connector.
  2. Disconnect the E10 ECM connector.
  3. Check the resistance between the wire harness side connectors.
    Standard (Check for open):
    
    Fig 3: VSV For AICV Connector And ECM Connector Terminals Specified Condition Chart (Check For Open)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Standard (Check for short):
    
    Fig 4: VSV For AICV Connector And ECM Connector Terminals Specified Condition Chart (Check For Short)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Reconnect the VSV for AICV connector.
  5. Reconnect the ECM connector.
    
    Fig 5: Identifying VSV For AICV Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 6: Disconnecting E10 ECM Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the wire harness between the VSV for AICV and the EFI relay.
  1. Disconnect the V4 VSV for AICV 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 7: VSV For AICV And EFI Relay Terminals Specified Condition Chart (Check For Open)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Reconnect the VSV for AICV connector.
  5. Reinstall the EFI relay.
    
    Fig 8: Identifying EFI Relay Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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