Problem Symptoms Table
HINT:
- 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.
COOLING FAN SYSTEM
| Symptom | Suspected Area | See page |
|---|---|---|
| Cooling fans do not operate (main and sub fans) | Cooling fan circuit | Refer to Cooling Fan Circuit |
| FAN No. 3 relay | Refer to ON-VEHICLE INSPECTION - Step 3 | |
| Cooling fan motor | Refer to ON-VEHICLE INSPECTION - Step 1 | |
| No. 2 cooling fan motor | Refer to ON-VEHICLE INSPECTION - Step 2 | |
| Air conditioning system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| ECM | Refer to REMOVAL | |
| Cooling fan does not operate (main fan) | Engine coolant temperature sensor | Refer to INSPECTION |
| Cooling fan circuit | Refer to Cooling Fan Circuit | |
| FAN No. 1 relay | Refer to ON-VEHICLE INSPECTION - Step 1 | |
| FAN No. 2 relay | Refer to ON-VEHICLE INSPECTION - Step 2 | |
| Cooling fan motor | Refer to ON-VEHICLE INSPECTION - Step 1 | |
| ECM | Refer to REMOVAL | |
| Cooling fan does not operate (sub fan) | Cooling fan circuit | Refer to Cooling Fan Circuit |
| No. 2 cooling fan motor | Refer to ON-VEHICLE INSPECTION - Step 2 | |
| Air conditioning system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| ECM | Refer to REMOVAL | |
| Cooling fans do not stop (main and sub fans) | Cooling fan circuit | Refer to Cooling Fan Circuit |
| Air conditioning system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| FAN No. 3 relay | Refer to ON-VEHICLE INSPECTION - Step 3 | |
| ECM | Refer to REMOVAL | |
| Cooling fan does not stop (main fan) | Engine coolant temperature sensor | Refer to INSPECTION |
| Cooling fan circuit | Refer to Cooling Fan Circuit | |
| FAN No. 1 relay | Refer to ON-VEHICLE INSPECTION - Step 1 | |
| ECM | Refer to REMOVAL | |
| Cooling fan speed does not change (main and sub fans) | Engine coolant temperature sensor | Refer to INSPECTION |
| Cooling fan circuit | Refer to Cooling Fan Circuit | |
| FAN No. 2 relay | Refer to ON-VEHICLE INSPECTION - Step 2 | |
| ECM | Refer to REMOVAL |