FLA -318
FUEL SYSTEM
DTC P0217 ENGINE COOLANT OVER TEMPERATURE CONDITION
COMPONENT LOCATION
E72AF219
CMPS [Bank 2]
ECTS
LGLG510A
GENERAL DESCRIPTION
E8DE49EF
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
E351C025
The Engine Coolant Temperature High Rationality Diagnostic checks for unusually high engine coolant temperatures un-
der normal operating loads.
PCM monitors difference between the startup and current coolant temperature and compares agaist the threshold while
enable condition is met. If the PCM detects that the coolant temperature exceeds the limit under normal operating condi-
tion, PCM determines that a fault exists and a DTC is stored.