SFI SYSTEM, Diagnostic DTC:P0116

DTC Code DTC Name
P0116 Engine Coolant Temperature Circuit Range / Performance Problem

DESCRIPTION

Refer to DTC P0115 Click here.

DTC No. DTC Detection Condition Trouble Area
P0116

When either of following conditions met (2 trip detection logic):


  • During engine warming up after cold engine start, change in Engine Coolant Temperature (ECT) sensor output below threshold

  • In duration between warmed engine stopped and next cold engine start, change in ECT sensor output below threshold

  • Thermostat


  • Engine coolant temperature sensor

MONITOR DESCRIPTION



CONFIRMATION DRIVING PATTERN

A005HVUE91

  1. Connect the intelligent tester to the DLC3.

  2. Turn the ignition switch to ON and turn the intelligent tester on.

  3. Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp.

  4. Check that the coolant temperature is 60°C (140°F) or less.

  5. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).

  6. Turn the ignition switch off and wait for at least 30 seconds.

  7. Turn the ignition switch to ON and turn the intelligent tester on [A].

  8. Start the engine and idle it for 5 minutes or more [B].

    Tech Tips

    If the engine coolant temperature does not change by 5°C (9°F) or more, the engine coolant temperature sensor is malfunctioning. It is not necessary to continue this procedure.

  9. Enter the following menus: Powertrain / Engine and ECT / DTC [C].

  10. 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.

  11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  12. Input the DTC: P0116.

  13. Check the DTC judgment result.

    Intelligent tester 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
    UNKNOWN

    • 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 shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or UNKNOWN, perform steps [D] and [E].

  14. Drive the vehicle at 40 km/h (25 mph) or more for a total of 5 minutes or more [D].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

    Tech Tips

    In the event of the driving pattern being interrupted (possibly due to factors such as traffic conditions), the driving pattern can be resumed.

  15. Check the DTC judgment result again [E].

    Tech Tips


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

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or UNKNOWN, perform steps [D] and [E] again.

CAUTION / NOTICE / HINT

Tech Tips


  • If any of DTCs P0115, P0117 or P0118 are set simultaneously with DTC P0116, the engine coolant temperature sensor may have an open or a short circuit. Troubleshoot those DTCs first.

  • Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions 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. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0116)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

    4. Enter the following menus: Powertrain / Engine and ECT / DTC.

    5. Read the DTCs.

      Result
      Result Proceed to
      DTC P0116 is output A
      DTC P0116 and other DTCs are output B

      Tech Tips

      If any DTCs other than P0116 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. INSPECT THERMOSTAT


    1. Remove the thermostat Click here.

    2. Measure the valve opening temperature of the thermostat.

      Standard temperature
      80°C to 84°C (176°F to 183°F)

      Tech Tips

      In addition to the above check, confirm that the valve is completely closed when the temperature is below the standard.

    3. Reinstall the thermostat Click here.


    OK

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    NG

    REPLACE THERMOSTAT Click here