ECD SYSTEM, Diagnostic DTC:P0115

DTC Code DTC Name
P0115 Engine Coolant Temperature Sensor 1 Circuit

DESCRIPTION

Refer to DTC P0117.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0115 Engine Coolant Temperature Sensor 1 Circuit

Change in value from engine coolant temperature sensor after engine started less than change in value estimated from sensor characteristics.

(3 trip detection logic)

  • Engine coolant temperature sensor

  • ECM

 Comes on DTC stored

CAUTION / NOTICE / HINT

Note

When replacing the ECM, the ECM needs registration and initialization.

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Tech Tips


  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • Read freeze frame data using the GTS. Freeze frame data records the engine condition 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, and other data from the time the malfunction occurred.

PROCEDURE


  1. READ VALUE USING GTS (COOLANT TEMP)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

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


      Powertrain > Engine and ECT > Data List
      Tester Display
      Coolant Temp

    4. Start the engine and wait 5 minutes.

    5. Read the value.

      OK
      80 to 100°C (176 to 212°F) with warm engine.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    OK

  2. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 4 Click here

  3. REPLACE ENGINE COOLANT TEMPERATURE SENSOR


    1. Replace the engine coolant temperature sensor.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs.


      Powertrain > Engine and ECT > Clear DTCs

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

    7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.


      Powertrain > Engine and ECT > Trouble Codes

    8. Confirm that the DTC is not output again.

      Result
      Proceed to
      NEXT

    NEXT

    END