COOLING FAN SYSTEM PROBLEM SYMPTOMS TABLE
Tech Tips
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
| Symptom | Suspected Area | See page |
|---|---|---|
| Cooling fans do not operate | Engine coolant temperature sensor | |
| Cooling fan motor | ||
| No. 2 cooling fan motor | ||
| Cooling fan relay (RDI FAN No. 1) | ||
| Cooling fan circuit | ||
| ECM | ||
| Cooling fans do not stop (continue to operate) | Engine coolant temperature sensor | |
| Cooling fan circuit | ||
| Cooling fan ECU | ||
| ECM | ||
| Cooling fan speed does not change (main and sub fans) | Cooling fan circuit | |
| ECM |