SFI SYSTEM, Diagnostic DTC:P0117 and P0118

DTC Code DTC Name
P0117 Engine Coolant Temperature Sensor 1 Circuit Low
P0118 Engine Coolant Temperature Sensor 1 Circuit High

DESCRIPTION

Refer to DTC P0115.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0117

Engine Coolant Temperature Sensor 1 Circuit Low

Short to ground in engine coolant temperature sensor circuit.

  • Engine coolant temperature sensor

  • Wire harness or connector

  • ECM

Comes on

DTC stored

P0118

Engine Coolant Temperature Sensor 1 Circuit High

Open or short to +B in engine coolant temperature sensor circuit.

  • Engine coolant temperature sensor

  • Wire harness or connector

  • ECM

Comes on

DTC stored

MONITOR DESCRIPTION

These DTCs are stored when a malfunction is detected in the engine coolant temperature sensor circuit. If there is an open or short in the engine coolant temperature sensor circuit when the ignition switch is turned to ON, the ECM will illuminate the MIL and store a DTC.

WIRING DIAGRAM

Refer to DTC P0115.

Click here

PROCEDURE

  1. READ VALUE USING GTS (WATER TEMPERATURE NOT CORRECTED)

    1. With the engine stopped, leave the vehicle as is and wait until the engine coolant is cool.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

    5. Enter the following menus: Powertrain / Engine / Data List / Water Temperature Not Corrected.

      Powertrain > Engine > Data List

      Tester Display

      Water Temperature Not Corrected

    6. Read the value.

      OK

      The engine coolant temperature after cold soak is almost the same as the ambient temperature.

    Result

    Proceed to

    OK

    NG
    OK

    CHECK FOR INTERMITTENT PROBLEMS

    Click here

    NG

  2. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ENGINE COOLANT TEMPERATURE SENSOR)

    A340586C01

    *a

    Front view of wire harness connector

    (to Engine Coolant Temperature Sensor)

    1. Disconnect the engine coolant temperature sensor connector.

    2. Turn the ignition switch to ON.

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      B50-1 - B50-2

      Ignition switch ON

      4.75 to 5.25 V

    Result

    Proceed to

    OK

    NG
    NG

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

    OK

  3. INSPECT ENGINE COOLANT TEMPERATURE SENSOR

    1. Inspect the engine coolant temperature sensor.

      Click here

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE ECM

    Click here

    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR

    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

      B50-1 - B55-14 (THW)

      Always

      Below 1 Ω

      B50-2 - B55-26 (ETHW)

      Always

      Below 1 Ω

      B50-1 or B55-14 (THW) - Body ground and other terminals

      Always

      10 kΩ or higher

      B50-2 or B55-26 (ETHW) - Body ground and other terminals

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE ECM

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR