ACIS Control Circuit: Procedure

PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VSV FOR INTAKE CONTROL)
1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for Intake Control.
5. Check if operating noise can be heard when operating the intake air control valve assembly using the Techstream.
  OK
  
  Operating noise can be heard.
NG → See step 2

OK → See step 6
INSPECT INTAKE AIR SURGE TANK ASSEMBLY (INTAKE AIR CONTROL VALVE ASSEMBLY OPERATION)
1. Inspect the intake air surge tank assembly (intake air control valve assembly). Refer to ON-VEHICLE INSPECTION [06/2012 - ] .
NG → See step 7

OK: Go to next step

CHECK TERMINAL VOLTAGE (POWER SOURCE OF INTAKE AIR CONTROL VALVE ASSEMBLY)

Disconnect the intake air control valve assembly connector.

Fig 1: Identifying Intake Air Control Valve Connector & Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Turn the engine switch on (IG).

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

Standard Voltage

Tester Connection	Condition	Specified Condition
D42-2 - Body ground	Engine switch on (IG)	11 to 14 V

TEXT IN ILLUSTRATION

*a	Front view of wire harness connector (to Intake Air Control Valve Assembly)

NG → See step 5

OK: Go to next step

CHECK HARNESS AND CONNECTOR (INTAKE AIR CONTROL VALVE ASSEMBLY - ECM)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
D42-1 - D23-47 (ACIS)	Always	Below 1 Ω
D42-1 or D23-47 (ACIS) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 8

CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - INTAKE AIR CONTROL VALVE ASSEMBLY)

Remove the No. 1 integration relay from the engine room relay block and junction block assembly.
Disconnect the intake air control valve assembly connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
1A-8 - D42-2	Always	Below 1 Ω
1A-8 or D42-2 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 9

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [06/2012 - ]
REPLACE INTAKE AIR SURGE TANK ASSEMBLY. Refer to REMOVAL [06/2012 - ]
REPLACE ECM. Refer to REMOVAL [06/2012 - ]
GO TO ECM POWER SOURCE CIRCUIT. Refer to ECM Power Source Circuit