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 (built into intake air surge tank 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 4200 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 intake air control valve assembly is open.

A01G59QE31
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 assembly circuit

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

  • No. 1 integration relay

  • ECM

WIRING DIAGRAM

A01G63VE03

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 GTS. 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 GTS (ACTIVATE THE VSV FOR INTAKE CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

    5. Check if operating noise can be heard when operating the intake air control valve assembly using the GTS.

      OK
      Operating noise can be heard.

    NG

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

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

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


    1. Inspect the intake air surge tank assembly (intake air control valve assembly) Click here.


    NG

    REPLACE INTAKE AIR SURGE TANK ASSEMBLY Click here

    OK

  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF INTAKE AIR CONTROL VALVE ASSEMBLY)


    1. A01G7WQE15
      Text in Illustration
      *a

      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
      D42-2 - Body ground Engine switch on (IG) 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (INTAKE AIR CONTROL VALVE ASSEMBLY - NO. 1 INTEGRATION RELAY) Click here

    OK

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


    1. Disconnect the intake air control valve assembly connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D42-1 - D23-47 (ACIS) Always Below 1 Ω
      D42-1 or D23-47 (ACIS) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here

  5. CHECK HARNESS AND CONNECTOR (INTAKE AIR CONTROL VALVE ASSEMBLY - NO. 1 INTEGRATION RELAY)


    1. Disconnect the intake air control valve assembly connector.

    2. Remove the No. 1 integration relay from the engine room relay block and junction block assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D42-2 - 1A-8 Always Below 1 Ω
      D42-2 or 1A-8 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE NO. 1 INTEGRATION RELAY Click here