The main element of the fuel temperature sensor is a negative temperature coefficient (NIC) thermistor, which is part of a voltage divider circuit. 5V is used as a reference voltage.
The voltage drop across the thermistor is transmitted to the ECM via an analog-to-digital converter (ADC). According to the characteristic stored in memory, the ECM determines the temperature as a function of voltage.
Checking the sensor
Check the sensor after turning the ignition key to the ON or START position.
Temperature | Resistance, kOhm |
–30°C | 22,22–31,78 |
–20°C | 13,24–18,10 |
0°C | 5,18–6,60 |
20°C | 2,27–2,73 |
40°C | 1,059–1,281 |
60°C | 0,538–0,650 |
80°C | 0,322–0,298 |
100°C | 0,185–0,167 |
120°C | 0,097–0,127 |