СИСТЕМА ECD, 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, whose resistance value varies according to the engine coolant temperature, is built into the engine coolant temperature sensor.

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

Tip:

If DTC P0115, P0117 or P0118 is stored, the ECM operates the fail-safe function in which the engine coolant temperature 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
Table 1. Related Data List
DTC No. Data List
P0115 Coolant Temp
P0117
P0118
Tip:
  • 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 / All Data / Coolant Temp.

    Table 2. Reference:
    Temperature Displayed Malfunction
    -40°C (-40°F) Open circuit
    140°C (284°F) Short circuit

CONFIRMATION DRIVING PATTERN

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

WIRING DIAGRAM

A012JB0E23
Table 3.
*a Engine Coolant Temperature Sensor

CAUTION / NOTICE / HINT

Note:

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

Tip:

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 / All Data / Coolant Temp.

      Powertrain > Engine and ECT > Data List
      Tester Display
      Coolant Temp
    4. Read the value.

      OK
      60 to 90°C (140 to 194°F) with warm engine.
      Result
      Result Proceed to
      -40°C (-40°F) A
      140°C (284°F) B
      60 to 90°C (140 to 194°F) C
      Tip:
      • 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).

    B Нажмите здесь

    C Нажмите здесь

    GO TO STEP 11


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

    1. Disconnect the engine coolant temperature sensor connector.

      A012GYAC01
      *1 Engine Coolant Temperature Sensor
      *2 ECM
      *a

      Front view of wire harness connector

      (to Engine Coolant Temperature Sensor)

    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 / All Data / Coolant Temp.

      Powertrain > Engine and ECT > Data List
      Tester Display
      Coolant Temp
    6. Read the value.

      Standard value
      140°C (284°F)
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

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

    1. Replace the engine coolant temperature sensor.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT Нажмите здесь

    GO TO STEP 11


  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
      B166-2 - B164-111 (THW) Always Below 1 Ω
      B166-1 - B164-88 (ETHW) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

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

    1. Replace the ECM.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT Нажмите здесь

    GO TO STEP 11


  6. REPAIR OR REPLACE HARNESS OR CONNECTOR

    1. Repair or replace the harness or connector.

      Result
      Proceed to
      NEXT
    NEXT Нажмите здесь

    GO TO STEP 11


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

    1. Disconnect the engine coolant temperature sensor connector.

      A012M93C04
      *1 Engine Coolant Temperature Sensor
      *2 ECM
    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 / All Data / Coolant Temp.

      Powertrain > Engine and ECT > Data List
      Tester Display
      Coolant Temp
    5. Read the value.

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

    OK
  8. REPLACE ENGINE COOLANT TEMPERATURE SENSOR

    1. Replace the engine coolant temperature sensor.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT Нажмите здесь

    GO TO STEP 11


  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
      B166-2 or B164-111 (THW) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    GO TO STEP 6


    OK
  10. REPLACE ECM

    1. Replace the ECM.

      Click hereНажмите здесь

      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 and ECT > Clear DTCs
    5. Turn the ignition switch to ON for 1 second.

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

    7. Confirm that the DTC is not output.

      Powertrain > Engine and ECT > Trouble Codes
      Result
      Proceed to
      NEXT
    NEXT

    END