Hand-held Tester:

1. Turn the ignition switch to ON and turn the hand-held tester ON.
2. Select the item: DIAGNOSIS/ENHANCED OBD II/ACTIVE TEST/INTAKE CTL VSV1 and operate the VSV for AICV.
3. Check the operation of the VSV when the VSV 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

OK: Go to step   4 

NG: GO TO NEXT STEP. 

NG: REPLACE INTAKE AIR CONTROL VALVE ASSY NO.3 

OK: GO TO NEXT STEP. 

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
      Fig 8: Identifying EFI Relay Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Reconnect the VSV for AICV connector.
   5. Reinstall the EFI relay.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP. 

NG: REPAIR OR REPLACE 

OK: REPLACE ECM (See  ECM (3MZ-FE)  )