ECD SYSTEM(w/ DPF), 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 that of 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 engine coolant temperature is assumed to be 80°C (176°F).

P0115
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Engine switch on (IG) for 0.5 seconds 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
P0117
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Engine switch on (IG) for 0.5 seconds 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
P0118
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Engine switch on (IG) for 0.5 seconds 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
Related Data List
DTC No. Data List

P0115

P0117

P0118

 Coolant Temp

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: 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

WIRING DIAGRAM

A01WUDUE23

CAUTION / NOTICE / HINT

Note


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

  • After replacing the fuel supply pump assembly, the ECM needs initialization Click here.

  • After replacing an injector assembly, the ECM needs registration 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 (ENGINE COOLANT TEMPERATURE)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG) and turn the GTS on.

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

    4. Read the value.

      OK
      70 to 90°C (158 to 194°F) with warm engine
      Result
      Result Proceed to
      -40°C (-40°F) A
      140°C (284°F) or higher B
      70 to 90°C (158 to 194°F) C

      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.


    B

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

    C

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

    A

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


    1. A01WQX1E02
      Text in Illustration
      *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 wire harness side connector.

    3. Connect the GTS to the DLC3.

    4. Turn the engine switch on (IG) and turn the GTS on.

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

    6. Read the value.

      OK
      140°C (284°F) or higher

    7. Reconnect the engine coolant temperature sensor connector.


    OK

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

    NG

  3. 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
      for LHD
      Tester Connection Condition Specified Condition
      C83-2 - C110-93 (THW) Always Below 1 Ω
      C83-1 - C110-92 (E2) Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      C83-2 - C138-93 (THW) Always Below 1 Ω
      C83-1 - C138-92 (E2) Always Below 1 Ω

    4. Reconnect the engine coolant temperature sensor connector.

    5. Reconnect the ECM connector.


    OK

    CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM. Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

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


    1. A01WVGLE03
      Text in Illustration
      *1 Engine Coolant Temperature Sensor
      *2 ECM

      Disconnect the engine coolant temperature sensor connector.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG) and turn the GTS on.

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

    5. Read the value.

      OK
      -40°C (-40°F)

    6. Reconnect the engine coolant temperature sensor connector.


    OK

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

    NG

  5. 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
      for LHD
      Tester Connection Condition Specified Condition
      C83-2 or C110-93 (THW) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      C83-2 or C138-93 (THW) - Body ground Always 10 kΩ or higher

    4. Reconnect the engine coolant temperature sensor connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  6. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

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


    1. Replace the engine coolant temperature sensor Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  8. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

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


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  10. REPLACE ENGINE COOLANT TEMPERATURE SENSOR


    1. Replace the engine coolant temperature sensor Click here.


    NEXT

  11. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs Click here.

    3. Turn the engine switch on (IG) for 1 second.

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

    5. Confirm that the DTC is not output again.


    NEXT

    END