Radiator (Cooling) Fan Control Relay(S)
NOTE:
For radiator cooling fan relay testing, see RELAYS
under RELAYS & SOLENOIDS.
The ECU 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 RADIATOR (COOLING) FAN CONTROL Flow chart.
A/C SWITCH ON (NX & SENTRA 1.6L)
| Engine Coolant Temp. °F (°C) | Vehicle Speed MPH | Radiator Fan | |
|---|---|---|---|
| Less Than 202 (94) | 50 Or More | Off | |
| " | 49 Or Less | Low | |
| 203-210 (95-99) | N/A | Low | |
| Greater Than 212 (100) | |||
| Automatic Transmission | N/A | High | |
| Manual Transmission | N/A | Low | |
A/C SWITCH OFF (NX & SENTRA 1.6L)
| Engine Coolant Temp. °F (°C) | Vehicle Speed MPH | Radiator Fan | |
|---|---|---|---|
| Less Than 195 (90) | N/A | Off | |
| 196-201 (91-94) | 12 Or More | Off | |
| " | 12 Or Less | Low | |
| 203-210 (95-99) | 50 Or More | Off | |
| " | 49 Or Less | Low | |
| Greater Than 212 (100) | |||
| Automatic Transmission | N/A | High | |
| Manual Transmission | N/A | Low | |
A/C SWITCH ON (NX & SENTRA 2.0L - A/T)
| Engine Coolant Temp. °F (°C) | Vehicle Speed MPH | (1) Radiator Fan | ||
|---|---|---|---|---|
| Less Than 202 (94) | 50 Or More | Off | ||
| " | 49 Or Less | Low | ||
| 203-210 (95-99) | N/A | Low | ||
| 212-219 (100-104) | 12 Or Less | Low | ||
| " | 12 Or More | High | ||
| Greater Than 220 (105) | N/A | High | ||
|
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A/C SWITCH OFF (NX & SENTRA 2.0L - A/T)
| Engine Coolant Temp. °F (°C) | Vehicle Speed MPH | Radiator Fan |
|---|---|---|
| Less Than 202 (94) | N/A | Off |
| 203-210 (95-99) | N/A | Low |
| 212-219 (100-104) | 12 Or Less | Low |
| " | 12 Or More | High |
| Greater Than 221 (105) | N/A | High |
A/C SWITCH ON (NX & SENTRA 2.0L - M/T)
| Engine Coolant Temp. °F (°C) | Vehicle Speed MPH | Radiator Fan |
|---|---|---|
| Less Than 202 (94) | 50 Or More | Off |
| " | 49 Or Less | On |
| 203 (95) Or More | N/A | On |
A/C SWITCH OFF (NX & SENTRA 2.0L - M/T)
| Engine Coolant Temp. °F (°C) | Vehicle Speed MPH | Radiator Fan |
|---|---|---|
| Less Than 202 (94) | N/A | Off |
| 203-210 (95-99) | 12 Or Less | Off |
| " | 12 Or More | On |
| Greater Than 212 (100) | N/A | On |
NOTE:
For Flow chart symbol identification, see Fig 1
.