1993 Nissan-Datsun Sentra SE-R, AutomaticFACTORY OEM SERVICE PROCEDURE

Radiator Cooling Fans (Except 240SX): 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. Tests are not available for Pathfinder and Pickup.

A/C SWITCH ON (ALTIMA)

Engine Coolant Temp. °F (°C) Vehicle Speed MPH Radiator Fan
Less Than 221 (105) 11 Or Less (1) Low
Greater Than 221 (105) 11 Or Less (1) High
Any Temperature 11 Or Less (2) High
Less Than 212 (100) 12-50 Low
Greater Than 212 (100) 12-50 High
Less Than 203 (95) 51 Or More Off
203-212 (95-100) 51 Or More Low
212-221 (100-105) 51 Or More High
(1) With A/C triple-pressure switch off.
(2) With A/C triple-pressure switch on.
A/C SWITCH OFF (ALTIMA)

Engine Coolant Temp. °F (°C) Vehicle Speed MPH Radiator Fan
Less Than 203 (95) 11 Or Less Off
203-221 (95-105) 11 Or Less Low
Greater Than 221 (105) 11 Or Less High
Less Than 203 (95) 12 Or More Off
203-212 (95-100) 12 Or More Low
Greater Than 212 (100) 12 Or More High
A/C SWITCH ON (MAXIMA VE30DE ENGINE)

Engine Coolant Temp. °F (°C) Vehicle Speed MPH Radiator Fan
Less Than 203 (95) 49 Or Less Low
" 50 Or More Off
203-212 (95-100) All Speeds Low
212-221 (100-105) 12 Or Less Low
" 12 Or More High
Greater Than 221 (105) All Speeds High
A/C SWITCH OFF (MAXIMA VE30DE ENGINE)

Engine Coolant Temp. °F (°C) Vehicle Speed MPH Radiator Fan
Less Than 203 (95) All Speeds Off
203-212 (95-100) 11 Or Less Off
" 12 Or More Low
212-221 (100-105) 11 Or Less Low
" 12 Or More High
Greater Than 221 (105) All Speeds High
A/C SWITCH ON (MAXIMA VG30E ENGINE)

Engine Coolant Temp. °F (°C) (1) Cooling Fan Speed Relay No. (Off Or On)
Less Than 201 (94) (2) Low 1 (On), 2 & 3 (Off)
203-219 (95-104) (3) High 1, 2 & 3 (On)
Greater Than 221 (105) High 1, 2 & 3 (On)
(1) Radiator cooling fans will operate at high speed if engine (coolant) temperature sensor is defective.
(2) The radiator cooling fan should be off when vehicle speed is greater than 50 MPH.
(3) The radiator cooling fan should be on low speed when vehicle speed is less than 12 MPH.
A/C SWITCH OFF (MAXIMA VG30E ENGINE)

Engine Coolant Temp. °F (°C) Cooling Fan Speed Relay No. (Off Or On)
Less Than 205 (96) Off 1, 2 & 3 (Off)
207-223 (97-106) (1) Low 1 (On), 2 & 3 (Off)
Greater Than 225 (107) High 1, 2 & 3 (On)
(1) The radiator cooling fan should be off when vehicle speed is less than 12 MPH.
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) All Speeds Low
Greater Than 212 (100)
Automatic Transmission All Speeds High
Manual Transmission All Speeds Low
A/C SWITCH OFF (NX & SENTRA - 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 (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) 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 (NX & SENTRA - 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 (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 All Speeds 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) All Speeds Off
203-210 (95-99) 11 Or Less Off
" 12 Or More On
Greater Than 212 (100) All Speeds On
A/C SWITCH ON (QUEST)

Engine Coolant Temp. °F (°C) Vehicle Speed MPH Radiator Fan
Less Than 201 (94) 68 Or Less Low
Less Than 201 (94) 68 Or More Off
203 (95)-219 (104) 11 Or Less Low
203 (95)-219 (104) 12 Or More High
Greater Than 221 (105) All Speeds High
A/C SWITCH OFF (QUEST)

Engine Coolant Temp. °F (°C) Vehicle Speed MPH Radiator Fan
Less Than 201 (94) All Speeds Off
203 (95)-210 (99) All Speeds Low
212 (100)-219 (104) 11 Or Less Low
212 (100)-219 (104) 12 Or More High
Greater Than 221 (105) All Speeds High
A/C SWITCH ON (300ZX TURBO)

Engine Coolant Temp. °F (°C) Vehicle Speed MPH Radiator Fan
Less Than 201 (94) 24 Or Less Off
More Than 203 (95) 24 Or Less On
Less Than 219 (104) 25 Or More Off
More Than 221 (105) 25 Or More On
A/C SWITCH ON (300ZX NON-TURBO)

Engine Coolant Temp. °F (°C) Vehicle Speed MPH Radiator Fan
Less Than 192 (89) 24 Or Less Off
192 (89)-210 (99) 24 Or Less Low
More Than 212 (100) 24 Or Less High
Less Than 219 (104) 25 Or More Off
More Than 221 (105) 25 Or More On
A/C SWITCH OFF (300ZX TURBO & NON-TURBO)

Engine Coolant Temp. °F (°C) Radiator Fan
Less Than 219 (104) Off
More Than 221 (105) On
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.