Question about 1993 Saturn SW1

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Engine cooling fan

Does not work

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  • yadayada
    yadayada May 11, 2010

    is the engine overheating? does the fan run with the AC on?

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Try the fan switch or for more steps email me at poppinwheelies@sbcglobal.net

Posted on Feb 26, 2009

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Where can I get pictures of the fans in the engine compartment?


Radiator Cooling Fans - Professional Mechanics Online

www.2carpros.com/articles/how-an-electric-cooling-fan-works
Aug 1, 2015 - Step 1 - There are primarily two types of engine radiator cooling fan, electric and manual. A manual fan is connected to the engine drive pulleys ...

article How a fan clutch works

https://www.2carpros.com/articles/how-a-clutch-fan-works
Sep 3, 2015 - Step 1 - A fan clutch function is to engage the fan blade to the shaft when heated which is mounted to the front of the engine attached to the ...

Improving an Engine Cooling Fan Using Design for Six Sigma

www.mathworks.com/.../improving-an-engine-cooling-fan-u...

MathWorksA key component of an engine's cooling system is the cooling fan, which ... a shroud to direct airflow through the radiator (image courtesy of Novak Conversions).

Dec 21, 2015 | 1996 Chevrolet Cavalier

1 Answer

My ac is not working I have a Chevy Tahoe 2005 the fans won't turn on either .


Hi Maria , The A/C system wouldn't keep the fans from running but none working cooling fans will keep the A/C from working ! This is a fairly complex system if your not familiar with this sort of thing ! I will add the description from the factory service manual.
Cooling Fan Control - Two Fan System
The engine cooling fan system consists of 2 electrical cooling fans and 3 fan relays. The relays are arranged in a series/parallel configuration that allows the powertrain control module (PCM) to operate both fans together at low or high speeds. The cooling fans and fan relays receive battery positive voltage from the underhood fuse block.
During low speed operation, the PCM supplies the ground path for the low speed fan relay through the low speed cooling fan relay control circuit. This energizes the low speed fan relay coil, closes the relay contacts, and supplies battery positive voltage from the low fan fuse through the cooling fan motor supply voltage circuit to the left cooling fan. The ground path for the left cooling fan is through the cooling fan s/p relay and the right cooling fan. The result is a series circuit with both fans running at low speed.
During high speed operation the PCM supplies the ground path for the low speed fan relay through the low speed cooling fan relay control circuit. After a 3 second delay, the PCM supplies a ground path for the high speed fan relay and the cooling fan s/p relay through the high speed cooling fan relay control circuit. This energizes the cooling fan s/p relay coil, closes the relay contacts, and provides a ground path for the left cooling fan. At the same time the high speed fan relay coil is energized closing the relay contacts and provides battery positive voltage from the high fan fuse on the cooling fan motor supply voltage circuit to the right cooling fan. During high speed fan operation, both engine cooling fans have there own ground path. The result is a parallel circuit with both fans running at high speed.
Do you have a check engine light lit ? The thing to do would have it check at the dealer or a ASE certified repair facility ! They could hook up a advanced scan tool an diagnose fairly quick ! Or you could find a wiring diagram an try testing with a volt meter yourself ! But watch yourself so you don't short out the PCM - engine computer !

May 01, 2015 | AC Cars & Trucks

2 Answers

Engine coolant fan wont come on. The fan motor is fine. whats next?


You still have many other components in that system that has to be in working order for the cooling fan to work properly. The cooling fan is turned on when engine temp reaches a predetermined temp, usually around 220-230 degrees F. the ECT (engine coolant temp) sensor siganls the ECM (Engine Control Module) to ground the cooling fan relay or cooling fan module(if equipped) and if the cooling fan fuse is good and the fan has power to it the realy will complete the ground for the fan to run. You may need to have a qualified technician diagnose the problem if the obvious things like fuses and good grounds are not the problem.

Hope this helps.

Oct 22, 2013 | 1999 Ford Contour

1 Answer

Dodge Stratus R/T fan doesn't come on while car is running and car is getting hot.


FAN NOT WORKING


It can be issue with faulty motor or its faulty fan control relay.


Bother are to be inspected.

Test volt at fan relay and fan motor.

-------------

For more help, I suggest you to go through the troubleshooting links mentioned below:-----

Click the link below: ------

How to replace Cooling Fan on Acura Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-cooling-fan-on-acura-car.html

--------------

OBD Code P1490 low speed fan relay ckt open-short

http://schematicsdiagram.blogspot.com/2012/11/obd-code-p1490-low-speed-fan-relay-ckt.html

---------------

Engine cooling components working?

http://repairhelpcenter.blogspot.com/2011/11/engine-cooling-components-working.html

----------

How does Vehicles Engine cooling system works?

http://repairhelpcenter.blogspot.com/2011/11/how-does-vehicles-engine-cooling-system.html

---------------

Hyundai Sonata cooling fan not working

http://schematicsdiagram.blogspot.in/2012/02/hyundai-sonata-cooling-fan-not-working.html

-------------

Fuel pump relay and cooling fan relay troubleshooting on 1997 ford thunderbird?

http://repairhelpcenter.blogspot.com/2011/10/fuel-pump-relay-and-cooling-fan-relay.html

--------------

Fan belt routing diagram for 2004 Volkswagen Jetta?

http://carbeltrouting.blogspot.com/2011/12/fan-belt-routing-diagram-for-2004.html

---------

Timing belt, drive belt, serpentine belt, accessory belt, fan belt, engine belt routing diagrams for all types of car models?

http://carbeltrouting.blogspot.in/2012/02/timing-beltdrive-beltserpentine.html

-------------

A/C, heater, defroster fan, not working?

http://technoanswers.blogspot.in/2012/02/ac-heater-defroster-fan-not-working.html

---------

Blower fan not running on Isuzu trooper?

http://technoanswers.blogspot.in/2012/02/blower-fan-not-running-on-isuzu-trooper.html

---------

How to replace blower motor fan assembly on 2000 GMC Yukon?

http://repairhelpcenter.blogspot.com/2012/01/how-to-replace-blower-motor-fan.html

----------

Heater AC or defroster fan not working on KIA?

http://technoanswers.blogspot.in/2012/02/heater-ac-or-defroster-fan-not-working.html

------------

These will help.

Thanks.

Nov 27, 2012 | Cars & Trucks

3 Answers

Fan won't work


It can be issue with faulty motor or its faulty fan control relay.
Bother are to be inspected.Test volt at fan relay and fan motor.-------------
For more help,i suggest you to go through the troubleshooting links mentioned below:-----Click the link below:------

How to replace Cooling Fan on Acura Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-cooling-fan-on-acura-car.html
--------------

OBD Code P1490 low speed fan relay ckt open-short
http://schematicsdiagram.blogspot.com/2012/11/obd-code-p1490-low-speed-fan-relay-ckt.html
---------------

Engine cooling components working?

http://repairhelpcenter.blogspot.com/2011/11/engine-cooling-components-working.html

----------

How does Vehicles Engine cooling system works?

http://repairhelpcenter.blogspot.com/2011/11/how-does-vehicles-engine-cooling-system.html

---------------

Hyundai Sonata cooling fan not working

http://schematicsdiagram.blogspot.in/2012/02/hyundai-sonata-cooling-fan-not-working.html

-------------

Fuel pump relay and cooling fan relay troubleshooting on 1997 ford thunderbird?

http://repairhelpcenter.blogspot.com/2011/10/fuel-pump-relay-and-cooling-fan-relay.html
--------------

Fan belt routing diagram for 2004 Volkswagen Jetta?

http://carbeltrouting.blogspot.com/2011/12/fan-belt-routing-diagram-for-2004.html
---------

Timing belt, drive belt, serpentine belt, accessory belt, fan belt, engine belt routing diagrams for all types of car models?

http://carbeltrouting.blogspot.in/2012/02/timing-beltdrive-beltserpentine.html
-------------

A/C, heater, defroster fan, not working?

http://technoanswers.blogspot.in/2012/02/ac-heater-defroster-fan-not-working.html
---------

Blower fan not running on Isuzu trooper?

http://technoanswers.blogspot.in/2012/02/blower-fan-not-running-on-isuzu-trooper.html
---------

How to replace blower motor fan assembly on 2000 GMC Yukon?

http://repairhelpcenter.blogspot.com/2012/01/how-to-replace-blower-motor-fan.html
----------

Heater AC or defroster fan not working on KIA?

http://technoanswers.blogspot.in/2012/02/heater-ac-or-defroster-fan-not-working.html
------------These will help.Thanks.

Nov 27, 2012 | Cars & Trucks

2 Answers

Engine cooling fan only works when ac or defrost is on


if engine at long stand still,the engine temperature will rise about 190 degrees the cooling fan suppose to automaticaly turn on when coolant temperature sensor get hot it cause its resistance decrease causing pcm to send power to coolant fan relays and cooling fans, when you turn on AC the cooling fans suppose to turn on to cool down AC CONDENSOR, IF NOT AC WONT WORK COOLING FAN COOLS DOWN REFRIGERANT SO IT CAN RECYCLE THROUGH THE SYSTEM AGAIN.your cooling is suppose to turn on when engine at a sit still if vechicle not moving as coolant temperature rises at a set point the cooling fans will turn on cool down engine.cooling fans dont turn on when you first cold stsrt vechicle unless you have AC SWITCH ON.if cooling fans dont turn on when vechicle at a long stand still or moving along slow traffic.if coolant temperature sensor been replaced and fuses and relays okay have dealership check see if pcm driver circuit working faulty pcm will cause cooling fans not to turn on.

Sep 27, 2012 | 1996 Buick Century

1 Answer

Fan comes on when switch ignition on instead of when hot Tazz


If the fan not turning on when car engine getting hot,then car will notice overheating.Click this link below for troubleshooting:---http://technoanswers.blogspot.in/2012/02/car-running-hot.html--------To know how engine cooling system works ,click the link below :----Engine cooling components working?

http://repairhelpcenter.blogspot.com/2011/11/engine-cooling-components-working.html

------------------
How does Vehicles Engine cooling system works? http://repairhelpcenter.blogspot.com/2011/11/how-does-vehicles-engine-cooling-system.html
------------How to Replace Engine cooling Fan:-- http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-engine-cooling-fan-on.html
-----------Replace Fan Relay but still Radiator cooling fans not working? http://schematicsdiagram.blogspot.com/2011/12/replace-fan-relay-but-still-radiator.html
----------DIC says "COOLING FAN FAULT"? http://schematicsdiagram.blogspot.com/2011/12/dic-says-cooling-fan-fault.html
---------Where Is Radiator Fan relay and Fuse Located?

http://schematicsdiagram.blogspot.com/2011/12/where-is-radiator-fan-relay-and-fuse.html

--------

This will help.

Thanks.

Feb 09, 2012 | Cars & Trucks

1 Answer

My radiator fan is not working


For radiator replacement procedure and radiator problem troubleshooting. I suggest you to click the link below and follow the detailed procedure :-----

------------

How to Replace Engine cooling Fan on car? http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-engine-cooling-fan-on.html

------------

Engine makes noise and Cooling Fan belt Breaks? http://howtobyme.blogspot.com/2011/12/engine-makes-noise-and-cooling-fan-belt.html

-----------

Replace Fan Relay but still Radiator cooling fans not working? http://schematicsdiagram.blogspot.com/2011/12/replace-fan-relay-but-still-radiator.html

--------

Cooling fan relays location? http://technoanswers.blogspot.in/2012/02/cooling-fan-relays-location-on-1998.html----------DIC says "COOLING FAN FAULT"? http://schematicsdiagram.blogspot.com/2011/12/dic-says-cooling-fan-fault.html
------------

How to replace radiator Cooling Fan?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-cooling-fan-on-acura-car.html

---------------
Engine cooling components working?

http://repairhelpcenter.blogspot.com/2011/11/engine-cooling-components-working.html

-------------
How does Vehicles Engine cooling system works? http://repairhelpcenter.blogspot.com/2011/11/how-does-vehicles-engine-cooling-system.html

----------

cooling fan not working http://schematicsdiagram.blogspot.in/2012/02/hyundai-sonata-cooling-fan-not-working.html----------- Fuel pump relay and cooling fan relay troubleshooting? http://repairhelpcenter.blogspot.com/2011/10/fuel-pump-relay-and-cooling-fan-relay.html

----------
Why Transmission fluid leaks near radiator?

http://repairhelpcenter.blogspot.in/2012/02/transmission-fluid-leaks-near-radiator.html

----------
Transmission fluid leaking?

http://technoanswers.blogspot.in/2012/02/ford-windstar-transmission-fluid.html


-------------
How to replace Radiator?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-radiator-on-audi-and-vw.html

----------
HOW TO REPLACE AN UPPER RADIATOR HOSE

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-upper-radiator-hose.html

------------
HOW TO REPLACE A LOWER RADIATOR HOSE

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-lower-radiator-hose.html

-------------
How to replace Radiator on Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-radiator-on-acura-car.html

------------
How to flush cars radiator?

http://repairhelpcenter.blogspot.com/2011/11/how-to-flush-cars-radiator.html

--------
HOW TO PRESSURE TEST A RADIATOR AND CAP

http://schematicsdiagram.blogspot.com/2011/07/how-to-pressure-test-radiator-and-cap.html

----------------
HOW TO REPLACE A RADIATOR

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-radiator.html
------------------

HOW TO REPLACE A RADIATOR SUPPORT

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-radiator-support.html

-----------

This details will help.

Thanks.

Feb 01, 2012 | 1997 Mercury Cougar XR7

1 Answer

I just bought a 1995 jetta and it's running at 260 degrees. Is this too high, and if it is then what would be causing this?


CHECK TO SEE IF BOTH COOLING FANS RUNNING ARE RUNNING WHEN ENGINE RUNNING START OVERHEATING IF COOLING FANS NOT WORKING CHECK COOLING FANS LARGE FUSES IN THE ENGINE COMPARTMENT OR YOU COULD FAULTY COOLING FANS THERMO SWITCH BOTTOM LEFT SIDE OR RADIATOR.IF COOLING FANS IS WORKING WHILE ENGINE RUNNING.RADIATOR CORES AND HEATER CORE COULD BE CLOGGED.COOLANT SYSTEM NEED FLUSHING. THE THERMOSTAT PARTIALLY CLOSED CAUSE ENGINE OVER HEAT.CHECK WATERPUMP WEEP HOLE IF LEAKING WATER PUMP NEED REPLACING.

Jul 21, 2011 | Volkswagen Jetta Cars & Trucks

1 Answer

1996 Honda Odyessey engine cooling fans don't come on and engine on and engine temperature tends to go up. it will only come on when the AC is switched on. i do not need to run the AC all the time but i...


Check all fuses first. if the fuses are okay, disconnect the engine cooling fan connector and using jumper wires, connect the fan motor directly to the battery and ground. If the fan still doesn't work, replace it. If the fan does work, its relay may be faulty. Check in the engine compartment fuse box for the cooling fan relays. Try switching the cooling fan relays and see if the engine fan comes on and the a/c condensor fan stops working. If so, the engine cooling fan relay is faulty. If the engine fan still doesn't come on with a good relay, then check the engine temperature switch located at the passenger end of the front cylinder head. It is supposed to switch (have continuity) when the engine temperature reaches 205 deg F. You can remove the switch and put it in a pot of close to boiling water (212 deg F). If it doesn't have continuity at that temperature, it is defective.

Mar 21, 2011 | 1996 Honda Odyssey

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