ECD SYSTEM(for CCo), Diagnostic DTC:P0115, P0117, P0118

DTC Code DTC Name
P0115 Engine Coolant Temperature Circuit
P0117 Engine Coolant Temperature Circuit Low Input
P0118 Engine Coolant Temperature Circuit High Input

DESCRIPTION

A thermistor is built into the engine coolant temperature sensor and it changes its resistance value according to the engine coolant temperature.

The structure of the sensor and connection to the ECM is the same as the intake air temperature sensor.

Tech Tips

If DTC P0115, P0117 or P0118 is stored, the ECM operates the fail-safe function in which the ECT is assumed to be 80°C (176°F).

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

Open or short in the engine coolant temperature sensor circuit for 0.5 seconds.

(1 trip detection logic)

  • Open or short in engine coolant temperature sensor circuit

  • Engine coolant temperature sensor

  • ECM

 Comes on DTC stored
P0117 Engine Coolant Temperature Circuit Low Input

Short in the engine coolant temperature sensor circuit for 0.5 seconds.

(1 trip detection logic)

  • Short in engine coolant temperature sensor circuit

  • Engine coolant temperature sensor

  • ECM

 Comes on DTC stored
P0118 Engine Coolant Temperature Circuit High Input

Open in the engine coolant temperature sensor circuit for 0.5 seconds.

(1 trip detection logic)

  • Open in engine coolant temperature sensor circuit

  • Engine coolant temperature sensor

  • ECM

 Comes on DTC stored
Related Data List
DTC No. Data List
P0115 Coolant Temp
P0117
P0118

Tech Tips


  • If DTC P0115, P0117 and/or P0118 is stored, the following symptoms may appear:


    • Misfire

    • Combustion noise

    • Black smoke

    • White smoke

    • Lack of power

  • When DTC P0115, P0117 and/or P0118 is stored, check the engine coolant temperature by entering the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp.

    Reference:
    Temperature Displayed Malfunction
    -40°C (-40°F) Open circuit
    140°C (284°F) or higher Short circuit

CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern
P0115 Ignition switch ON for 0.5 seconds
P0117
P0118

WIRING DIAGRAM

B002A12E99
*a Engine Coolant Temperature Sensor

CAUTION / NOTICE / HINT

Note

After replacing the ECM, the new ECM needs registration (Click here ) and initialization Click here.

Tech Tips

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 > Data List
      Tester Display
      Coolant Temp

    4. Read the value.

      OK
      75 to 90°C (167 to 194°F) with warm engine.
      Result
      Proceed to
      -40°C (-40°F)
      140°C (284°F) or higher
      75 to 90°C (167 to 194°F)

      Tech Tips


      • If there is an open circuit, the GTS indicates -40°C (-40°F).

      • If there is a short circuit, the GTS indicates 140°C (284°F) or higher.


    140°C (284°F) or higher

    READ VALUE USING GTS (CHECK FOR SHORT IN WIRE HARNESS) Click here

    75 to 90°C (167 to 194°F)

    GO TO STEP 11 Click here

    -40°C (-40°F)

  2. READ VALUE USING GTS (CHECK FOR OPEN IN WIRE HARNESS)


    1. B002A7LC48
      *1 Engine coolant temperature sensor
      *2 ECM
      *a

      Front view of wire harness connector

      (to Engine coolant temperature sensor)

      Disconnect the engine coolant temperature sensor connector.

    2. Connect terminals 1 and 2 of the engine coolant temperature sensor connector on the wire harness side.

    3. Connect the GTS to the DLC3.

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

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


      Powertrain > Engine > Data List
      Tester Display
      Coolant Temp

    6. Read the value.

      Standard value
      140°C (284°F) or higher
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) Click here

    OK

  3. CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE ENGINE COOLANT TEMPERATURE SENSOR.


    1. Replace the engine coolant temperature sensor.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click here

  4. CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)


    1. Disconnect the engine coolant temperature sensor 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
      B134-2 - B76-111 (THW) Always Below 1 Ω
      B134-1 - B76-88 (ETHW) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  5. CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM.


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click here

  6. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click here

  7. READ VALUE USING GTS (CHECK FOR SHORT IN WIRE HARNESS)


    1. B0029E9C04
      *1 Engine Coolant Temperature Sensor
      *2 ECM

      Disconnect the engine coolant temperature sensor connector.

    2. Connect the GTS to the DLC3.

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

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


      Powertrain > Engine > Data List
      Tester Display
      Coolant Temp

    5. Read the value.

      OK
      -40°C (-40°F)
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) Click here

    OK

  8. REPLACE ENGINE COOLANT TEMPERATURE SENSOR


    1. Replace the engine coolant temperature sensor.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click here

  9. CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)


    1. Disconnect the engine coolant temperature sensor 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
      B134-2 or B76-111 (THW) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    GO TO STEP 6 Click here

    OK

  10. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  11. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

    5. Turn the ignition switch to ON for 1 second.

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


      Powertrain > Engine > Trouble Codes

    7. Confirm that the DTC is not output again.

      Result
      Proceed to
      NEXT

    NEXT

    END