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P0115 Engine Coolant Temperature Circuit
AutoHex Online Help: Hyundai TERRACAN(HP) 2003
TROUBLESHOOTING FOR DTC
DTC | P0115 | Engine Coolant Temperature Sensor (ECTS) Circuit Malfunction |
CC-CODE | 0b | Signal low (Open circuit or short circuit to battery line) |
02 | Signal high (Short circuit to ground) |
The engine coolant temperature sensor (ECTS) is located in the engine coolant passage of the cylinder head for detecting the engine coolant temperature. The ECTS uses a thermistor whose resistance changes with the temperature. The electrical resistance of the ECTS decreases as the engine coolant temperature increases, and increases as the engine coolant temperature decreases.The 5 V power source 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 ECTS changes according to the engine coolant temperature, the signal voltage also changes. This information of engine coolant temperature is used in determination of basic fuel quantity and cooling fan control.
DTC DETECTING CONDITIONCC-CODE | Detecting Condition | Suspect Area |
0b | Engine coolant temperature < -49°C(-56.2°F)
| Open or short in ECTS cirucit ECTS ECM
|
02 | Engine coolant temperature > 139°C(282.2°F)
|
SPECIFICATIONTemperature [°C (°F)] | -40(-40) | -20(-4) | 0(32) | 20(68) | 40(104) | 60(140) | 80(176) |
Resistance (kO) | 44.4 | 13.4 ~ 16.8 | 5.74 | 2.3 ~ 2.6 | 1.15 | 0.58 | 0.32 |
[SCHEMATIC DIAGRAM]
INSPECTION PROCEDURE