SFI SYSTEM, Diagnostic DTC:P268111, P268115

DTC Code DTC Name
P268111 Engine Coolant Bypass Valve Circuit Short to Ground
P268115 Engine Coolant Bypass Valve Circuit Short to Battery or Open

DESCRIPTION

Using the flow shutting valve (water valve), the dual-passage cooling system is divided between the engine and exhaust heat recirculator. Through this, the coolant-flow through the engine is reduced when operating the heater before the engine has warmed up.

By reducing the coolant flow, the engine can be warmed up in a shorter amount of time and the thermal efficiency of the engine will be enhanced. By reducing the warm up time, the fuel economy will be enhanced enabling the hybrid system to stop the engine sooner. The No. 2 engine coolant temperature sensor is installed between the exhaust heat recirculator and inlet side of the heater core. By comparing the signals of the No. 2 engine coolant temperature sensor and engine coolant temperature sensor, malfunctions of the flow shutting valve (water valve) can be detected.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P268111 Engine Coolant Bypass Valve Circuit Short to Ground Current operating state and target operating state differ for 3 seconds or more continuously (1 trip detection logic).

  • Open or short in flow shutting valve (water valve) circuit

  • Flow shutting valve (water valve)

  • ECM

 Does not come on DTC stored SAE Code: P2682
P268115 Engine Coolant Bypass Valve Circuit Short to Battery or Open Current operating state and target operating state differ for 3 seconds or more continuously (1 trip detection logic).

  • Open or short in flow shutting valve (water valve) circuit

  • Flow shutting valve (water valve)

  • ECM

 Does not come on DTC stored SAE Code: P2683

MONITOR DESCRIPTION

These DTCs are stored when an open or short is detected in the flow shutting valve (water valve) circuit. If the current operating state and target operating state of the flow shutting valve (water valve) do not match, the ECM will determine that there is a malfunction in the flow shutting valve (water valve) circuit and store a DTC.

CONFIRMATION DRIVING PATTERN

Tech Tips

Make sure to perform this procedure when the engine coolant temperature is between 5 and 40°C (41 and 104°F) and the difference between the engine coolant temperature and ambient temperature is within 10°C (18°F) or less.


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG).

  3. Turn the GTS on.

  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  5. Turn the power switch off and wait for at least 30 seconds.

  6. Turn the power switch on (IG).

  7. Turn the GTS on.

  8. Enter the following menus: Powertrain / Engine / Active Test / Activate the Coolant Water Route Switching Valve.

  9. Perform the Active Test Activate the Coolant Water Route Switching Valve, select "Close" and wait for 3 seconds or more.

  10. Perform the Active Test Activate the Coolant Water Route Switching Valve, select "Open" and wait for 3 seconds or more.

  11. Enter the following menus: Powertrain / Engine / Trouble Codes.

  12. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  13. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  14. Input the DTC: P268111 or P268115.

  15. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result is NORMAL, the system is normal.

    • If the judgment result is ABNORMAL, the system is malfunctioning.

    • If the judgment result is INCOMPLETE or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.

WIRING DIAGRAM

A001ONTE05

CAUTION / NOTICE / HINT

Note

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

Tech Tips


  • If DTCs P268111 and P268173 are output simultaneously, a short is suspected.

  • If DTCs P268111 and P268172 are output simultaneously, an open is suspected.

  • If DTCs P268115 and P268173 are output simultaneously, a short is suspected.

  • 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. INSPECT FLOW SHUTTING VALVE (WATER VALVE)


    1. Inspect the flow shutting valve (water valve).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FLOW SHUTTING VALVE (WATER VALVE) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - FLOW SHUTTING VALVE (WATER VALVE))


    1. Disconnect the 1B No. 1 integration relay connector.

    2. Disconnect the C59 flow shutting valve (water valve) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1B-4 - C59-2 (+FSV) Always Below 1 Ω
      1B-4 or C59-2 (+FSV) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (FLOW SHUTTING VALVE (WATER VALVE) - ECM)


    1. Disconnect the C59 flow shutting valve (water valve) connector.

    2. Disconnect the C63 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C59-1 (-FSV) - C63-62 (WSV) Always Below 1 Ω
      C59-1 (-FSV) or C63-62 (WSV) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

    5. Turn the power switch off and wait for at least 30 seconds.

      Result
      Proceed to
      NEXT

    NEXT

  5. CHECK WHETHER DTC OUTPUT RECURS (DTC P268111 OR P268115)


    1. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

    2. Enter the following menus: Powertrain / Engine / Trouble Codes.

    3. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output A
      DTC P268111 or P268115 is output B

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

    REPLACE ECM Click here