Inspection Procedure

PERFORM ACTIVE TEST USING TECHSTREAM (VSV FOR AICV)

Turn the ignition switch to ON and turn the tester on.
Select the following menu items: Powertrain/Engine/Active Test/Activate the VSV for Intake Control and operate the VSV for AICV.

Check the operation of the VSV when the VSV is operated by Techstream.

Standard

VSV OPERATION CONDITION

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

OK: Go to step 4

Fig 1: Checking Operation Of VSV

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to next step

CHECK VSV (FOR AICV)
1. Inspect the intake air control valve assembly (See ON-VEHICLE INSPECTION ).
  NG: REPLACE INTAKE AIR CONTROL VALVE ASSEMBLY
  
  OK: Go to next step

INSPECT TERMINAL VOLTAGE (VSV FOR AICV CONNECTOR)

Measure the voltage according to the value(s) on the table below.

Standard voltage

VOLTAGE SPECIFIED CONDITION

Tester Connection	Specified Condition
1 - Body ground	9 to 14 V

Fig 2: Identifying A13 VSV For AICV Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 2 FUSE - VSV FOR AICV)

OK: Go to next step

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

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

Measure the resistance between the terminals of the wire harness side connectors and body ground.

Standard resistance (Check for open)

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Specified Condition
VSV for AICV (A13-2) - AICV (A55-4)	Below 1 Ω

Standard resistance (Check for short)

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Specified Condition
VSV for AICV (A13-2) or AICV (A55-4) - Body ground	10 kΩ or higher

INSPECT VACUUM TANK
1. Inspect the vacuum tank (See ON-VEHICLE INSPECTION ).
  NG: REPAIR OR REPLACE AIR CLEANER CAP
  
  OK: REPLACE ECM (See REMOVAL )