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P0180 Fuel Temperature Sensor A Circuit
AutoHex Online Help: Hyundai TERRACAN(HP) 2002
TROUBLESHOOTING FOR DTC
DTC | P0180 | Fuel Temperature Sensor (FTS) Circuit Malfunction |
CC-CODE | 0b | Signal low (Open circuit or short circuit to battery line) |
02 | Signal high (Short circuit to ground) |
The fuel temperature sensor (FTS) is located in the high-pressure pump assembly to measure the fuel temperature. The FTS uses a thermistor whose resistance changes with the temperature. The electrical resistance of the FTS decreases as the fuel temperature increases, and increases as the fuel temperature decreases.The 5 V power source in the ECM is supplied to the FTS via a resistor in the ECM. That is, the resistor in the ECM and the thermistor in the FTS are connected in series. When the resistance value of the thermistor in FTS changes according to the fuel temperature, the signal voltage also changes. This information of fuel temperature is used in correcting fuel quantity.
DTC DETECTING CONDITIONCC-CODE | Detecting Condition | Suspect Area |
0b | Fuel temperature < -40°C(-40°F)
| Open or short in FTS cirucit FTS ECM
|
02 | Fuel temperature > 140°C(284°F)
|
SPECIFICATIONTemperature [°C (°F)] | -30(-22) | -20(-4) | 0(32) | 20(68) | 40(104) | 60(140) | 80(176) |
Resistance (kO) | 22.2 ~ 31.8 | 13.2 ~ 18.1 | 5.2 ~ 6.6 | 2.3 ~ 2.7 | 1.1 ~ 1.3 | 0.54 ~ 0.65 | 0.30 ~ 0.32 |
[SCHEMATIC DIAGRAM]
INSPECTION PROCEDURE