SFI SYSTEM, Diagnostic DTC:P0660

DTC Code DTC Name
P0660 Intake Manifold Tuning Valve Control Circuit / Open (Bank 1)

DESCRIPTION

This circuit opens and closes the intake air control valve in response to changes in the engine load in order to increase the intake efficiency acoustic control induction system.

When the engine speed is between 0 and 4450 rpm and the throttle valve opening angle is 60° or more, the ECM supplies current to the actuator (ON status), to close the intake air control valve. Under other conditions, the actuator is usually OFF and the intake air control valve is open.

A017BZCE25
DTC No. DTC Detection Condition Trouble Area
P0660

The following conditions are met simultaneously for 0.5 seconds or more (2 trip detection logic):


  1. Voltage of terminal acoustic control induction system of the ECM is low when the actuator is OFF

  2. The engine has been started

  • Open or short in intake control valve circuit

  • Surge tank (acoustic control system actuator)

  • ECM

WIRING DIAGRAM

A017BP4E13

INSPECTION PROCEDURE

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Tech Tips

Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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. Start the engine and turn the tester on.

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

    4. Check if operating noise can be heard when operating the intake control valve using the intelligent tester.

      OK
      Operating noise can be heard.

    NG

    CHECK INTAKE AIR SURGE TANK ASSEMBLY (INTAKE AIR CONTROL VALVE OPERATION) Click here

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

  2. CHECK INTAKE AIR SURGE TANK ASSEMBLY (INTAKE AIR CONTROL VALVE OPERATION)


    1. A017BCSE12
      Text in Illustration
      *a

      Component without harness connected

      (Air Intake Control Valve)

      Disconnect the intake air control valve connector.

    2. Apply battery voltage between the terminals of the intake air control valve connector.

    3. Check the intake air control valve operation.

      OK
      Operational noise can be heard.

    NG

    REPLACE INTAKE AIR SURGE TANK ASSEMBLY Click here

    OK

  3. INSPECT TERMINAL VOLTAGE (INTAKE AIR CONTROL VALVE CONNECTOR)


    1. A017EH0E06
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Intake Air Control Valve)

      Disconnect the intake air control valve connection.

    2. Turn the ignition switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      2 - Body ground Ignition switch on (IG) 11 to 14 V

    4. Reconnect the intake air control valve connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 3 - INTAKE AIR CONTROL VALVE)

    OK

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


    1. Disconnect the intake air control valve connector.

    2. Disconnect the 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
      B28-1 - B48-19 (ACIS) Always Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Condition Specified Condition
      B28-1 or B48-19 (ACIS) - Body ground Always 10 kΩ or higher

    4. Reconnect the intake air control valve connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here