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.
Inspect the fuses related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | Link |
|---|---|---|
| Cooling fans do not operate (main and sub fans) | Engine coolant temperature sensor | |
| Cooling fan circuit | ||
| ECM | ||
| Cooling fan does not operate (main fan) | Cooling fan motor (for main fan) | |
| FAN LH relay | ||
| Cooling fan circuit | ||
| Cooling fan ECU (for main fan) | ||
| Cooling fan does not operate (sub fan) | No. 2 cooling fan motor (for sub fan) | |
| FAN RH relay | ||
| Cooling fan circuit | ||
| Cooling fan ECU (for sub fan) | ||
| Cooling fans do not stop (continue to operate) (main and sub fans) | Engine coolant temperature sensor | |
| Cooling fan circuit | ||
| ECM | ||
| Cooling fan does not stop (continues to operate) (main fan) | Cooling fan circuit | |
| Cooling fan ECU (for main fan) | ||
| Cooling fan does not stop (continues to operate) (sub fan) | Cooling fan circuit | |
| Cooling fan ECU (for sub fan) | ||
| Cooling fan speed does not change | Cooling fan circuit | |
| Cooling fan ECU | ||
| ECM |