ACIS Control Circuit [09/2015 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Start the engine.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for Intake Control.

   Powertrain > Engine > Active Test 

   Tester Display
   Activate the VSV for Intake Control

5. According to the display on the Techstream, perform the Active Test to operate the No. 1 vacuum switching valve (for intake air control valve sub-assembly) and check for the operating sound of the intake air control valve sub-assembly in the intake air surge tank assembly.

   OK

   Operating sounds can be heard.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [09/2015 - 12/2017]  , or refer to  PROBLEM SYMPTOMS TABLE [12/2017 - ] 

Result: 

NG 

See step  2

1. Inspect the intake air surge tank assembly (intake air control valve sub-assembly).

   Refer to ON-VEHICLE INSPECTION [09/2015 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE INTAKE AIR SURGE TANK ASSEMBLY. Refer to  REMOVAL [09/2015 - 08/2016]  , or refer to  REMOVAL [08/2016 - 12/2017]  , or refer to  REMOVAL [12/2017 - 08/2019]  , or refer to  REMOVAL [08/2019 - ] 

Result: 

OK 

See step  3

1. Check the vacuum hose sub-assembly (No. 1 vacuum switching valve (for intake air control valve sub-assembly) - intake air surge tank assembly) for looseness, disconnection and blockage.

   OK

   No looseness, disconnection or blockage.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE VACUUM HOSE SUB-ASSEMBLY 

Result: 

OK 

See step  4

1. Disconnect the vacuum hose sub-assembly from the No. 1 vacuum switching valve (for intake air control valve sub-assembly).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Start the engine.
3. Using your finger, confirm that the hose has suction.

   Result

   Result	Proceed to
   Suction applied	A
   No suction	B

Result: 

B 

See step  9

Result: 

A 

See step  5

1. Inspect the No. 1 vacuum switching valve (for intake air control valve sub-assembly).

   Refer to INSPECTION [09/2015 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE NO. 1 VACUUM SWITCHING VALVE (FOR INTAKE AIR CONTROL VALVE SUB-ASSEMBLY). Refer to  REMOVAL [09/2015 - ] 

Result: 

OK 

See step  6

1. Disconnect the No. 1 vacuum switching valve (for intake air control valve sub-assembly) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to No. 1 Vacuum Switching Valve (for Intake Air Control Valve Sub-assembly))

2. Turn the engine switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   D11-2 - Body ground	Engine switch on (IG)	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  8

Result: 

OK 

See step  7

1. Disconnect the No. 1 vacuum switching valve (for intake air control valve sub-assembly) connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D11-1 - D2-66 (ACIS)	Always	Below 1 Ω
   D11-1 or D2-66 (ACIS) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [09/2015 - 08/2016]  , or refer to  REMOVAL [08/2016 - 08/2019]  , or refer to  REMOVAL [08/2019 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the semiconductor PWR integration ECU connector.
2. Disconnect the No. 1 vacuum switching valve (for intake air control valve sub-assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1G-1 - D11-2	Always	Below 1 Ω
   1G-1 or D11-2 - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

GO TO ECM POWER SOURCE CIRCUIT. Refer to  ECM Power Source Circuit [09/2015 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Inspect the vacuum pump assembly.

   Refer to INSPECTION [09/2015 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPAIR OR REPLACE VACUUM HOSE SUB-ASSEMBLY (NO. 1 VACUUM SWITCHING VALVE (FOR INTAKE AIR CONTROL VALVE SUB-ASSEMBLY) - VACUUM PUMP ASSEMBLY) 

Result: 

NG 

REPLACE VACUUM PUMP ASSEMBLY. Refer to  REMOVAL [09/2015 - 08/2016]  , or refer to  REMOVAL [08/2016 - 08/2019]  , or refer to  REMOVAL [08/2019 - ]