ECD SYSTEM, Diagnostic DTC:P0115,P0117 and 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

A256089E23

CAUTION / NOTICE / HINT

Note:

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

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

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

    C

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

    A

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

    1. A298508C01

      *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 / 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

    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

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick 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

      B166-2 - B164-111 (THW)

      Always

      Below 1 Ω

      B166-1 - B164-88 (ETHW)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

    OK

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

    1. Replace the ECM.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  6. REPAIR OR REPLACE HARNESS OR CONNECTOR

    1. Repair or replace the harness or connector.

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

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

    1. A226261C04

      *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 / 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

    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

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick 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

      B166-2 or B164-111 (THW) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick 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 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