LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 1994 >> Sentra SE-R, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Miscellaneous Controls >> Radiator Cooling Fans >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Radiator Cooling Fans: Notes

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 (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) All Speeds Low
Greater Than 212 (100)
Automatic Transmission All Speeds High
Manual Transmission All Speeds Low
A/C SWITCH OFF (1.6L)

Engine Coolant Temp. °F (°C) Vehicle Speed MPH Radiator Fan
Less Than 195 (90) All Speeds Off
196-201 (91-94) 12 Or More Off
" 11 Or Less Low
203-210 (95-99) 50 Or More Off
" 49 Or Less Low
Greater Than 212 (100)
Automatic Transmission All Speeds High
Manual Transmission All Speeds Low
A/C SWITCH ON (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) All Speeds Low
212-219 (100-104) 11 Or Less Low
" 12 Or More High
Greater Than 220 (105) All Speeds High
(1) Radiator cooling fan will operate at high speed if engine (coolant) temperature sensor is defective.
A/C SWITCH OFF (2.0L A/T)

Engine Coolant Temp. °F (°C) Vehicle Speed MPH Radiator Fan
Less Than 202 (94) All Speeds Off
203-210 (95-99) All Speeds Low
212-219 (100-104) 11 Or Less Low
" 12 Or More High
Greater Than 221 (105) All Speeds High
A/C SWITCH ON (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 All Speeds On
A/C SWITCH OFF (2.0L M/T)

Engine Coolant Temp. °F (°C) Vehicle Speed MPH Radiator Fan
Less Than 202 (94) All Speeds Off
203-210 (95-99) 11 Or Less Off
" 12 Or More On
Greater Than 212 (100) All Speeds On