FTS(Fuel Temperature Sensor) is located in the engine fuel passage from the fuel tank.
It detects the fuel temperature and relays signals to the ECM.
It employs a thermistor, which is sensitive to changes in the fuel temperature.
The electric resistance of a thermistor decreases as the temperature increases, and increases as the temperature decreases.
The power source in the ECM is supplied to the FTS via a resistor in the ECM.
It is used during injection control strategies that make corrections depending on the fuel temperature and in order to protect the system in event of excessive fuel temperature.
In case of more than FTS 120°C, the engine symptom generates the power loss or poor acceleration.
If the signal is below threshold value, the ECM judged this as a fault and DTC is set.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Signal check, low | ● Short to ground in signal circuit ● Faulty FTS ● Faulty ECM |
Enable Conditions | ● Ignition on | |
Threshold Value | ● Output signal < 112 mV | |
Diagnostic Time | ● 0.48 sec. | |
MIL Fuel Limit Fuel Cut EGR Off | ● No ● No ● No ● Yes | |
Fail safe | ● Engine fuel temperature is fixed at value of 60°C by ECM. |
IATS | |||
Temperature (°C) | 20 | 40 | 60 |
Resistance (kΩ) | 2.27 ~ 2.73 | 1.06 ~ 1.28 | 0.54 ~ 0.65 |
