SFI SYSTEM, Diagnostic DTC:P0661, P0662

DTC Code DTC Name
P0661 Intake Manifold Tuning Valve Control Circuit Low
P0662 Intake Manifold Tuning Valve Control Circuit High

DESCRIPTION

Based on the engine speed and throttle opening angle information from the ECM, the acoustic control induction system controls the intake air control valve actuator. In order to change the effective length of the intake manifold, the air control valve actuator opens and closes the intake manifold's ACIS valve via the link. As a result, the low-to-medium speed range torque and high rpm range performance are improved.

A01GXY8E01
DTC No. DTC Detection Condition Trouble Area
P0661

Open in intake air control valve actuator circuit

(2 trip detection logic)

  • Intake manifold

  • Intake air control valve actuator

  • Intake air control valve actuator circuit

  • ECM
P0662

Motor operation circuit (ECM interior) detects overcurrent or overheat

(2 trip detection logic)

  • Intake manifold

  • Intake air control valve actuator

  • Intake air control valve actuator circuit

  • ECM

WIRING DIAGRAM

A01H1FGE01

INSPECTION PROCEDURE

Tech Tips

Read freeze frame data using the intelligent tester. 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.

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch ON (IG) and turn the tester ON.

    3. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for Intake Control.

    4. Check the operation of the intake air control valve actuator using the tester.


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

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

    C

    REPLACE INTAKE MANIFOLD Click here

    A

  2. INSPECT INTAKE AIR CONTROL VALVE ACTUATOR

    A01H0KR

    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

    NG

    REPLACE INTAKE AIR CONTROL VALVE ACTUATOR Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (INTAKE AIR CONTROL VALVE ACTUATOR - ECM)


    1. A01H064E01

      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)
      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)
      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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here