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: 

OK: Go to step   5 

Fig 1: Inspecting VSV For AICV

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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): 

   TESTER CONNECTION SPECIFICATION
   
   

   Tester Connection	Specified Condition
   VSV for AICV (V4-2) - AICV (E10-33)	Below 1 Ω

   Standard (Check for short): 

   TESTER CONNECTION AND SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   Tester Connection	Specified Condition
   VSV for AICV (V4-2) or AICV (E10-33) - Body ground	10 kΩ or higher

2. Reconnect the VSV for AICV connector.
3. Reconnect the ECM connector.

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): 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   VSV for AICV (V4-1) - EFI relay terminal 3 of J/B	Below 1 Ω

4. Reconnect the VSV for AICV connector.
5. Reinstall the EFI relay.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 2: Identifying VSV For AICV Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Identifying E10 ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Identifying EFI Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE 

OK: REPLACE ECM (See  REPLACEMENT  )