Inspection Procedure

READ VALUE OF INTELLIGENT TESTER (VSV FOR AICV)

Turn the ignition switch ON and push the intelligent tester main switch ON.
Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / INTAKE CTL VSV1. Operate the VSV.
Check the operation of the VSV when the VSV is operated by the intelligent tester.

Standard

VSV FOR AICV

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 Operation Of VSV For AICV

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO STEP 4

NG : Go to next step

CHECK VSV FOR AICV
1. Inspect the VSV for AICV. (See ON-VEHICLE INSPECTION )
NG : REPLACE VSV FOR AICV

OK : Go to next step

CHECK HARNESS AND CONNECTOR (VSV FOR AICV - ECM, VSV FOR AICV - EFI MAIN RELAY)

Check the wire harness between the VSV and ECM.

Disconnect the I1 VSV connector for AICV.
Disconnect the E8 ECM connector.
Measure the resistance of the wire harness side connectors.

Standard resistance

VSV FOR AICV - ECM

Tester Connection	Specified Condition
I1-1 - E8-33 (AICV)	Below 1 Ω
I1-1 or E8-33 (AICV) - Body ground	10 kΩ or higher

Check the wire harness between the VSV and the EFI MAIN relay.

Check the EFI No. 2 fuse.
- Remove the EFI No. 2 fuse from the fusible link block.
- Measure the resistance of the EFI No. 2 fuse.
  Standard resistance:
  
  Below 1 Ω
- Reinstall the EFI No. 2 fuse.
Disconnect the I1 VSV for AICV connector.
Remove the EFI MAIN relay from the engine room R/B.
Measure the resistance of the wire harness side connectors.

Standard resistance

VSV FOR AICV - EFI MAIN RELAY

Tester Connection	Specified Condition
I1-2 (VSV for AICV) - EFI MAIN relay terminal 3	Below 1 Ω

Fig 2: Checking Harness And Connector (VSV For AICV - ECM, VSV For AICV - EFI Main Relay)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Install the EFI MAIN relay.
Reconnect the VSV connector and ECM connector.

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : Go to next step

INSPECT VACUUM TANK
1. Inspect the vacuum tank. (See ON-VEHICLE INSPECTION )
NG : REPLACE VACUUM TANK

OK : REPLACE ECM

CHECK VSV FOR AICV
NG : REPLACE INTAKE AIR CONTROL VALVE ASSEMBLY NO. 3

OK : Go to next step

INSPECT ECM

Turn the ignition switch ON.
Measure the voltage of the ECM connectors.

Standard voltage

VSV FOR AICV

Tester Connection	Specified Condition
E8-33 (AICV) - E7-1 (E1)	9 to 14 V

Fig 3: Inspecting ECM

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : Go to next step

INSPECT VACUUM TANK
1. Inspect the vacuum tank. (See ON-VEHICLE INSPECTION )
NG : REPLACE VACUUM TANK

OK : Go to next step
CHECK HARNESS AND CONNECTOR (VSV FOR AICV - ECM, VSV FOR AICV - EFI MAIN RELAY)

Check the wire harness between the VSV for AICV and ECM.

Disconnect the I1 VSV for AICV connector.
Disconnect the E8 ECM connector.
Measure the resistance of the wire harness side connectors.

Standard resistance

VSV FOR AICV - ECM

Tester Connection	Specified Condition
I1-1 - E8-33 (AICV)	Below 1 Ω
I1-1 or E8-33 (AICV) - Body ground	10 kΩ or higher

Check the wire harness between the VSV for AICV and EFI MAIN relay.

Check the EFI No. 2 fuse.
- Remove the EFI No. 2 fuse from the fusible link block.
- Measure the resistance of the EFI No. 2 fuse.
  Standard resistance:
  
  Below 1 Ω
- Reinstall the EFI No. 2 fuse.
Disconnect the I1 VSV for AICV connector.
Remove the EFI MAIN relay from the engine room R/B.
Measure the resistance of the wire harness side connectors.

Standard resistance

VSV FOR AICV - EFI MAIN RELAY

Tester Connection	Specified Condition
I1-2 (VSV for AICV) - EFI MAIN relay terminal 3	Below 1 Ω

Fig 4: Checking Harness And Connector (VSV For AICV - ECM, VSV For AICV - EFI Main Relay)

Install the EFI MAIN relay.
Reconnect the VSV connector and ECM connector.

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : REPLACE ECM