DTC P0115 Engine Coolant Temperature Circuit Malfunction; DTC P0117 Engine Coolant Temperature Circuit Low Input; DTC 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 its connection to the ECM is similar to the intake air temperature sensor
HINT
When any of DTCs P0115, P0117 and P0118 are set, the ECM enters fail safe mode During fail safe mode, the engine coolant temperature is estimated to be 80°C (176°F) by the ECM Fail safe mode continues until a pass condition is detected.
DTC DETECTION CONDITION CHART
| DTC No | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0115 | Open or short in engine coolant temperature sensor circuit for 0 5 seconds (1 trip detection logic) |
|
| P0117 | Short in engine coolant temperature sensor circuit for 0 5 seconds (1 trip detection logic) |
|
| P0118 | Open in engine coolant temperature sensor circuit for 0 5 seconds (1 trip detection logic) |
|
HINT
When any of these DTCs are set, check the engine coolant temperature by entering the following menus Powertrain / Engine / Data List / Coolant Temp
TEMPERATURE DISPLAYED MALFUNCTION CHART
| Temperature Displayed | Malfunction |
|---|---|
| -40°C (-40°F) | Open circuit |
| 140°C (284°F) | Short circuit |