The fuel temperature sensor is equipped with a temperature-dependent resistor with a negative temperature coefficient (NTC) which is part of a voltage-divider circuit across which 5V are applied.
The voltage drop across the resistor is inputted into the ECM through an analog-to-digital converter (ADC) and is a measure for the temperature. A characteristic curve is stored in the ECM microcomputer which defines the temperature as a function of the given voltage value.
Check item | Output data | Check condition | Fuel temperature (°C) | Resistance (㏀) |
Fuel temperaturesensor | Fuel temperature | Ignition switch : ON or START | -30 | 22.22 ~ 31.78 |
-20 | 13.24 ~ 18.10 | |||
0 | 5.18 ~ 6.60 | |||
20 | 2.27 ~ 2.73 | |||
40 | 1.059 ~ 1.281 | |||
60 | 0.538 ~ 0.650 | |||
80 | 0.322 ~ 0.298 | |||
100 | 0.185 ~ 0.167 | |||
120 | 0.097 ~ 0.127 |
