ACIS Control Circuit: Wiring Diagram

1. Connect the intelligent tester to the DLC3.
2. Start the engine and turn the tester on.
3. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / INTAKE CTL VSV1.
4. Check if operating noise can be heard when operating the intake control valve using the intelligent tester.

   OK : 

   Operating noise can be heard. 

OK : CHECK FOR INTERMITTENT PROBLEMS 

NG : Go To Next Step 

1. Disconnect the air intake valve connector.
2. Apply battery voltage between the terminals of the air intake valve connector.
3. Check air intake valve operation.

   OK : Operating noise can be heard. 

   Fig 2: Identifying Air Intake Valve Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG : REPLACE INTAKE AIR SURGE TANK 

   OK : Go To Next Step 

1. Check the wire harness between the intake air control connector and the ECM connector.
   1. Disconnect the air intake valve connector.
   2. Disconnect the E5 ECM connector.
   3. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open) 

   STANDARD RESISTANCE (CHECK FOR OPEN)
   
   

   Tester Connection	Specified Condition
   Intake air control valve (E50-2) - ACIS (E5-3)	Below 1 Ω

   Standard resistance (Check for short) 

   Fig 3: Identifying E5 ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   STANDARD RESISTANCE (CHECK FOR SHORT)
   
   

   Tester Connection	Specified Condition
   Intake air control valve (E50-2) or ACIS (E5-3) - Body ground	10 kΩ or higher

2. Check the wire harness between the intake air control connector and the EFI No. 2 fuse.
   1. Disconnect the air intake valve connector.
   2. Remove the EFI No. 2 fuse from the engine room J/ B and R/B No. 2.
   3. Measure the resistance according to the value(s) in the table below.

Standard resistance (Check for open) 

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK : REPLACE ECM