Inspection Procedure

1. Turn the ignition switch ON and turn Techstream ON.
2. Select the following menu items: Powertrain / Engine and ECT / Active Test / Activate the VSV for AICS.
3. Check the operation of the VSV when the VSV is operated by Techstream.

   Standard 

   TESTER OPERATION SPECIFIED CONDITION CHART
   
   

   Tester Operation	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

   Fig 1: Identifying VSV Operation

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK:  Go to step  4

NG: Go to next step 

1. Inspect the AICV VSV (See ON-VEHICLE INSPECTION ).

NG: REPLACE INTAKE AIR CONTROL VALVE ASSEMBLY 

OK: Go to next step 

Fig 2: Identifying Wire Harness (AICV VSV - ECM And Integration Relay)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the EFI No. 1 fuse from the engine room No. 1 relay block.
2. Check the EFI No. 1 fuse.
3. Reinstall the EFI No. 1 fuse.
4. Disconnect the B31 AICV VSV connector.
5. Disconnect the A9 ECM connector.
6. Remove the integration relay from the engine room No. 1 relay block.
7. Disconnect the 1A integration relay connector.
8. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   B31-2 - A9-4 (AICV)	Below 1 Ω
   B31-1 - 1A-4	Below 1 Ω
   B31-2 or A9-4 (AICV) - Body ground	10 kΩ or higher
   B31-1 or 1A-4 - Body ground	10 kΩ or higher

9. Reconnect the integration relay connector.
10. Reinstall the integration relay.
11. Reconnect the ECM connector.
12. Reconnect the AICV VSV connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE ECM 

NG: REPAIR OR REPLACE VACUUM LEAKAGE POINT 

OK: REPAIR COMPLETED