Inspection Procedure

1. Turn the ignition switch ON and turn the intelligent tester ON.
2. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / AICV VSV.
3. Check the operation of the VSV when the VSV is operated by the intelligent tester.

   Standard 

   TESTER DISPLAY STATUS AND VOLTAGE REFERENCE
   
   

   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: Checking VSV Operation

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to step   4 

NG: Go TO NEXT STEP. 

1. Inspect the AICV VSV (See appropriate step(s) under ON-VEHICLE INSPECTION ).

NG: REPLACE INTAKE AIR CONTROL VALVE ASSEMBLY 

OK: Go TO NEXT STEP. 

1. Remove the EFI NO. 1 fuse from the engine room No. 1 relay block (see Fig 2).
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 

   CONNECTOR TERMINALS RESISTANCE REFERENCE AND CONDITION
   
   

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

   Fig 2: Identifying Engine Room No. 1 Relay Block, B31 & A9 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 AND CONNECTOR 

OK: REPLACE ECM 

NG: REPAIR OR REPLACE VACUUM LEAKAGE POINT 

OK: REPAIR COMPLETED