Air Intake Control Circuit [07/2015 - ]: Procedure

1. Disconnect the vacuum hose (Port F) from the vacuum switching valve (for air intake control valve).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Connect the Techstream to the DLC3.
3. Turn the engine switch on (IG).
4. Turn the Techstream on.
5. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for AICS.
6. Check the operation of the vacuum switching valve (for air intake control valve) when the vacuum switching valve (for air intake control valve) is operated using the Techstream.

   Standard

   Techstream Operation	Specified Condition
   ON	Air from port E flows out through port F
   OFF	Air from port E flows out through the air filter

   TEXT IN ILLUSTRATION
   
   

   *1	Air
   *2	Port E
   *3	Port F
   *4	Air Filter
   *a	Vacuum Switching Valve is On
   *b	Vacuum Switching Valve is Off

Result:  OK

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to PROBLEM SYMPTOMS TABLE [07/2015 - 08/2016] Refer to PROBLEM SYMPTOMS TABLE [08/2016 - ] )

Result:  NG

NG 

See step  2

1. Inspect the vacuum switching valve for air intake control valve (Refer to INSPECTION [07/2015 - ] ).

Result:  NG

NG 

REPLACE VACUUM SWITCHING VALVE (FOR AIR INTAKE CONTROL VALVE) 

(Refer to REMOVAL [07/2015 - ] )

Result:  OK

OK 

See step  3

1. Disconnect the vacuum switching valve (for air intake control valve) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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
   A9-1 - Body ground	Engine switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Vacuum Switching Valve (for Air Intake Control Valve))

Result:  NG

NG 

See step  7

Result:  OK

OK 

See step  4

1. Disconnect the vacuum switching valve (for air intake control valve) 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
   A9-2 - D23-46 (AICV)	Always	Below 1 Ω
   A9-2 or D23-46 (AICV) - Body ground	Always	10 kΩ or higher

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  OK

OK 

See step  5

1. Inspect the vacuum surge tank (Refer to ON-VEHICLE INSPECTION [07/2015 - ] ).

Result:  NG

NG 

REPAIR OR REPLACE AIR CLEANER CAP SUB-ASSEMBLY 

Result:  OK

OK 

See step  6

1. Check the vacuum hoses between vacuum switching valve (for air intake control valve), air cleaner cap sub-assembly and air intake control valve (Refer to PROCEDURE - Step 1 ).

Result:  OK

OK 

REPLACE ECM 

(Refer to REMOVAL [07/2015 - ] )

Result:  NG

NG 

REPAIR OR REPLACE VACUUM HOSE 

1. Remove the No. 1 integration relay from the engine room relay block and junction block assembly.
2. Disconnect the vacuum switching valve (for air intake control valve) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1C-3 - A9-1	Always	Below 1 Ω
   1C-3 or A9-1 - Body ground	Always	10 kΩ or higher

Result:  OK

OK 

GO TO ECM POWER SOURCE CIRCUIT 

(Refer to ECM Power Source Circuit [07/2015 - ] )

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR