Fuel Heater and Fuel Temperature Sensor Inspection
Precautions: Precautions for Fuel System Service · General safety (00)
Fuel Heater
•Check for terminals of fuel heater for damage. Replace fuel filter assembly if defective.
•Connect battery to fuel heater terminals as shown in figure.
Check that ammeter indicates specified current.
If check result is not as specified, replace fuel filter assembly.
•Connect battery to fuel heater terminals as shown in figure.
Check that ammeter indicates specified current.
If check result is not as specified, replace fuel filter assembly.
Reference: Fuel heater specified current at 13.5 V
Approx. 18.5 A
Fuel Temperature Sensor
1)Remove fuel heater and fuel temperature sensor. 
2)Check resistance between fuel temperature sensor terminals.
If check result is not as specified, replace fuel filter assembly.
If check result is not as specified, replace fuel filter assembly.
Fuel temperature sensor resistance
| Fuel temperature (°C (°F)) | Resistance (kΩ) |
|---|---|
| –30 (–22) | 23.5 – 28.6 |
| 0 (32) | 5.46 – 6.32 |
| 25 (77) | 1.94 – 2.17 |
| 60 (140) | 0.58 – 0.61 |
| 100 (212) | 0.18 – 0.19 |
| 115 (239) | 0.12 – 0.13 |