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 assembly in response to changes in the engine load in order to increase the intake efficiency using the acoustic control induction system.

When the engine speed is between 0 and 4300 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 assembly. Under other conditions, the VSV is usually off and the intake air control valve is open.

A019MWDE18
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 air control valve circuit

  • Intake air surge tank assembly (intake air control valve assembly)

  • ECM

WIRING DIAGRAM

A019MB2E05

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. Turn the engine switch on (IG) and turn the tester on.

    3. Enter the following menus: Powertrain / Engine / 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 ASSEMBLY OPERATION) Click here

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

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


    1. A019LREE06
      Text in Illustration
      *1

      Component without harness connected

      (Intake Air Control Valve Assembly)

      Disconnect the intake air control valve assembly connector.

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

    3. Check the intake air control valve assembly operation.

      OK
      Operating noise can be heard.

    4. Reconnect the intake air control valve assembly connector.


    NG

    REPLACE INTAKE AIR SURGE TANK ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (INTAKE AIR CONTROL VALVE ASSEMBLY VOLTAGE)


    1. A019KLCE04
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Intake Air Control Valve Assembly)

      Disconnect the intake air control valve assembly connector.

    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
      D5-2 - Body ground Engine switch on (IG) 11 to 14 V

    4. Reconnect the intake air control valve assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 2 FUSE - INTAKE AIR CONTROL VALVE ASSEMBLY)

    OK

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


    1. Disconnect the intake air control valve assembly connector.

      A019O3FE14

    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
      D5-1 - D1-62 (ACIS) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      D5-1 or D1-62 (ACIS) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Intake Air Control Valve Assembly)

      		 *2

      Front view of wire harness connector

      (to ECM)

    4. Reconnect the intake air control valve assembly connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (INTAKE AIR CONTROL VALVE ASSEMBLY - ECM)

    OK

    REPLACE ECM Click here