Inspection Procedure

HINT:

Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. PERFORM ACTIVE TEST USING TECHSTREAM 
   1. Connect the Techstream to the DLC3.
   2. Turn the engine switch on (IG) and turn the Techstream ON.
   3. Enter the following menus: Powertrain/Engine/Active Test/Activate the VSV for Intake Control.
   4. Check the operation of the intake air control valve actuator using the Techstream.
      1. Check acoustic control induction system (ACIS)
         1. Perform the Active Test, and check that the actuator link moves.

         OK: 

         Actuator link moves to left and right 

      2. Check intake air control valve actuator
         1. Disconnect the actuator link.
         2. Perform the Active Test, and check that the actuator shaft moves.

      OK: 

      Actuator shaft moves to left and right 

      Result 

      RESULT REFERENCE
      
      

      Check ACIS	Check intake air control valve actuator	Proceed to
      NG	NG	A
      OK	OK	B
      NG	OK	C

   B: CHECK FOR INTERMITTENT PROBLEMS  (See CHECK FOR INTERMITTENT PROBLEMS )

   C: REPLACE INTAKE MANIFOLD  (See REMOVAL )

   A: Go to Next Step 

2. INSPECT INTAKE AIR CONTROL VALVE ACTUATOR 
   1. Disconnect the E46 intake air control valve actuator circuit.
   2. When battery voltage is alternately applied to terminal 1 and 2 of the intake air control valve actuator, check that the actuator shaft moves.

   OK: 

   Actuator shaft moves to left and right 

   Fig 1: Inspecting Intake Air Control Valve Actuator

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE INTAKE AIR CONTROL VALVE ACTUATOR  (See REMOVAL )

   OK: Go to Next Step 

3. CHECK HARNESS AND CONNECTOR (INTAKE AIR CONTROL VALVE ACTUATOR - ECM) 
   1. Disconnect the E46 intake air control valve actuator connector.
   2. Disconnect the E4 ECM connector.
   3. Measure the resistance according to the value (s) in the table below.

   Standard resistance (Check for open) 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   E46-2 - E4-7 (ACM+)	Always	Below 1 Ω
   E46-1 - E4-6 (ACM-)	Always

   Standard resistance (Check for short) 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   E46-2 or E4-7 (ACM+) - Body ground	Always	10 kΩ or higher
   E46-1 or E4-6 (ACM-) - Body ground	Always

Fig 2: Identifying E46 Intake Air Control Valve Actuator And E4 ECM Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE ECM  (See REMOVAL )