Radiator Cooling Fans
The ECM controls radiator cooling fan(s) based on vehicle speed, engine coolant temperature and A/C switch position. The following tables list correct cooling fan operation based on certain conditions. See appropriate A/C SWITCH ON or A/C SWITCH OFF table. If cooling fan does not operate as specified, see appropriate RADIATOR (COOLING) FAN CONTROL TEST.
A/C SWITCH ON (A/T)
| Engine Coolant Temp. °F (°C) | Vehicle Speed MPH | Radiator Fan |
|---|---|---|
| Less Than 202 (94) | 50 Or More | Off |
| " | 49 Or Less | Low |
| 203-212 (95-100) | All Speeds | Low |
| 212-219 (100-104) | 11 Or Less | Low |
| " | 12 Or More | High |
| Greater Than 220 (105) | All Speeds | High |
A/C SWITCH OFF (A/T)
| Engine Coolant Temp. °F (°C) | Vehicle Speed MPH | Radiato Fan |
|---|---|---|
| Less Than 202 (94) | All Speeds | Off |
| 203-212 (95-100) | All Speeds | Low |
| 212-219 (100-104) | 11 Or Less | Low |
| " | 12 Or More | High |
| Greater Than 220 (105) | All Speeds | High |
A/C SWITCH ON (M/T)
| Engine Coolant Temp. °F (°C) | Vehicle Speed MPH | Radiato Fan |
|---|---|---|
| Less Than 202 (94) | 50 Or More | Off |
| " | 49 Or Less | On |
| 203 (95) Or More | All Speeds | On |
A/C SWITCH OFF (M/T)
| Engine Coolant Temp. °F (°C) | Vehicle Speed MPH | Radiator Fan |
|---|---|---|
| Less Than 202 (94) | All Speeds | Off |
| 203-212 (95-100) | 11 Or Less | Off |
| " | 12 Or More | On |
| Greater Than 212 (100) | All Speeds | On |