FLA -214
FUEL SYSTEM
DTC P0115 ENGINE COOLANT TEMPERATURE CIRCUIT
COMPONENT LOCATION
ED5B7286
CMPS [Bank 2]
ECTS
LGLG510A
GENERAL DESCRIPTION
ECEA26F1
The Engine Coolant Temperature Sensor (ECTS) is located in the engine coolant passage of the cylinder head for detect-
ing the engine coolant temperature. The ECTS uses a thermistor whose resistance changes with the temperature. The
electrical resistance of the ECTS decreases as the temperature increases, and increases as the temperature decreases.
The reference 5 V in the ECM is supplied to the ECTS via a resistor in the ECM. That is, the resistor in the ECM and
the thermistor in the ECTS are connected in series. When the resistance value of the thermistor in the ECTS changes
according to the engine coolant temperature, the output voltage also changes. During cold engine operation the ECM
increases the fuel injection duration and controls the ignition timing using the information of engine coolant temperature
to avoid engine stalling and improve drivability.
DTC DESCRIPTION
E0246E52
PCM calculates the difference between the starup and current coolant temperatures and compares against the threshold.
So if the difference is less than 3 C over certain period of time. PCM determines that a fault exists and a DTC is stored.
DTC DETECTING CONDITION
EA636012
Item
Detecting Condition
Possible cause
DTC Strategy
• Rationality check
Enable Conditions
• Engine Run state
• Time from IG "OFF" to IG "ON" 〉360min
• No Disabling Faults Present
Threshold value
• Difference between startup and current
ECT 〈 3 ℃(5.4℉)
Diagnosis Time
• Continuous
(More than 120 seconds failure within
150 second test)
MIL On Condition
• No MIL ON (DTC only)
• Poor connection
• Low level of Engine Coolant
• Improperly installed ECTS
• Open or short in circuit
• ECTS
• PCM