Question about 2000 Saturn SL

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2000 Saturn SL Cooling Fan

My cooling fan will not operate under normal conditions. However, if I turn the A/C control on it works.

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  • Master
  • 360 Answers

Its the temp sender for the fans. its located on the back of the head

Posted on Sep 25, 2008

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Posted on Jan 02, 2017

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My 07 Saturn Relay shows ac off for engine protection but the gauge shows cold. The hoses feel normal. What is happening?


A/C Off For Engine Protection
Refer to Cooling System Description and Operation

DTC P1258: Engine Coolant Overtemperature - Protection Mode Active.
This is something you need to take to a qualified repair shop .
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) or engine control module (ECM) to operate both fans together at low or high speeds. The cooling fans and fan relays receive battery positive voltage from the underhood junction block. The ground path is provided at G100.
During low speed operation, the PCM/ECM supplies the ground path for the low speed fan relay through the low speed cooling fan relay control circuit. This energizes the cooling fan 1 relay coil, closes the relay contacts, and supplies battery positive voltage from the cool fan 1 maxifuse® 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 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/ECM supplies the ground path for the cooling fan 1 relay through the low speed cooling fan relay control circuit. After a 3 second delay, the PCM/ECM supplies a ground path for the cooling fan 2 relay and the cooling fan relay through the high speed cooling fan relay control circuit. This energizes the cooling fan relay coil, closes the relay contacts, and provides a ground path for the left cooling fan. At the same time the cooling fan 2 relay coil is energized closing the relay contacts and provides battery positive voltage from the cool fan 2 maxifuse® 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.

Nov 20, 2016 | 2007 Saturn Relay

1 Answer

Relay and fuse diagram for 2001 Saturn SL


In the engine compartment fuse junction box its the fourth relay,you cant miss it, The fan fuse is the big 30 amp fuse.The cooling fan should come on when the air conditioning switch is activated,Your problem you are dealing with is common on Saturn the cooling fan never comes on.And you have to use the air condition system just to turn the fan on.Heres a way to trouble shoot the fan if you cant find the relay for the fan or you found the relay theres is two big relays one is the cooling fan.The other is the air pump ,take the cover off the relay and expose the mechanism,get a non conductive tool a toothpick will work fine collapse the relay so it make contact with the key on engine off make the relay make contact the fan should come on ,if it doesnt and you see spark(little spark)as you close the relay this tell you the power works replace the fan..if the fan comes on swap the relay.

Mar 10, 2012 | Cars & Trucks

2 Answers

Car overheats when not moving


Is cooling fan working? is there enough coolant? also check for coolant leakages.

May 20, 2011 | 2000 Saturn SL

1 Answer

I have a 2000 chevy malibu with obvious electrical problems. blinkers and flashers rarely work, no dash lights, terrible radio signal, and car runs hot when stopped for too long. We Just replaced the fans...


Cooling Fan Operation
The Electronic Control Module (ECM) regulates the voltage to the cooling fan relay. The relay operates the fan when the engine coolant temperature exceeds 106°C (223°F) The cooling fan will turn on automatically during extended idle conditions under 5 miles per hour. For diagnosis and location of the relay, refer to Electrical Diagnosis.

Relay Driven Dual Cooling Fan Diagnostics

Electric Testing Techniques You Need to Know
Do you know what a wiring diagrams is ? free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine ! Under system click on engine then under subsystem click on cooling fans . Click the search button then the blue link .

Test the electrical circuits before replacing parts !
Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts
How to Use Multimeter to Troubleshoot Common Problems



Jul 08, 2017 | 2000 Chevrolet Malibu

2 Answers

89 saturn fan does,nt kick on


cooling fan or heater fan? if its cooling fan then the coolant temp sensor is bad

Jan 06, 2010 | 1999 Saturn SL

1 Answer

2002 Saturn SL2 A/C Not working.


I would test the A/C compressor clutch coil first , easiest to do . If the electromagnet clutch coil is bad ,the compressor won't engage . Pull the A/C compressor clutch relay an jump pin's 30 & 87 , where the relay plug's into the fuse box . If pin 30 has B+ voltage ,pin 87 sends that B+ voltage to energize the clutch coil . These clutch coil's can go bad . You could also check the cooling fan this way , pull the cooling fan relay an take a piece of wire an jump pin's 30 & 87 .If fan is good it will run . Do you know how relay's work ?
VEHICLE RELAYS Operation Diagnosis

The PCM controls both relay's by supplying a ground to energize the relay .
Is the check engine light on ?
Do you know what a wiring diagram is ? How to use one along with a DVOM - digital volt ohm meter to test automotive electrical circuits ? Not guessing ? This is how an automotive technician would solve this problem , hooking up a scan tool an checking for code's ,using bi-direction control of scan tool to manually try to turn on coolant fan ,A/C compressor .....
Free wiring diagrams here http://www.bbbind.com/free_tsb.html
Enter vehicle info. year , make , model an engine size. Under system click on engine ,then under subsystem click on cooling fans ,check the electrical circuit's .

Dec 17, 2017 | 2002 Saturn Sl

1 Answer

Fan not turning off


check the relay switch for the cooling fans . they should be under the hood in the power supply box , sounds like the relay is sticking .

Dec 04, 2008 | 2000 Saturn Ls 4dr Sedan

3 Answers

Van chevrolet venture 2000


Fifteen minutes! you have bigger problems than only the fans the fans are controlled by a thermo switch that is heated by the coolant, If you have no coolant the sensor cannot activate But fifteen minutes seems like you may have a headgasket problem and steam cannot heat the coolant sensor.OperationNotesThe electric cooling fan operates when the engine cooling temperature exceeds a certain value. The cooling fan on this engine is controlled by the Powertrain Control Module (PCM) . The PCM turns the cooling fan ON by grounding the coil of the cooling fan relays when certain conditions are met. When the A/C is requested, the cooling fan will also be turned ON.

Power for the cooling fan motors are supplied through Maxifuses(R). The cooling fan relays are energized when current flows from the fuses in the Underhood Accessory Wiring Junction Block, and through the relay coils to ground through the PCM. The Coolant Fan 1 Relay Control Circuit is grounded for low speed fans operation. During low speed fans operation, both fans run at a slow speed. The Coolant Fan 1 Relay Control Circuit is grounded for high speed operation. During high speed fans operation, both fans run at high speed.

IMPORTANT: When certain Diagnostic Trouble Codes (DTCs) are present, the PCM may command the cooling fans to run all the time. Perform the A Powertrain On Board Diagnostic (OBD) System Check prior to diagnosing the engine cooling fans.

For more information regarding the Charging System, refer to Charging System Description , and Charging System Circuit Description in Starting and Charging.

If a problem that involves the low speed cooling fan relay control circuit exists, DTC P0480 Cooling Fan Relay 1 Control Circuit should set. If the problem affects the high speed cooling fan relay control circuit, DTC P0481 Cooling Fan Relay 2 Control Circuit should set. A problem with the ECT sensor should set DTC P0117 Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage, DTC P0118 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage, DTC P1114 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage, DTC P1115 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage. Any of these DTCs will affect cooling fan operation and should be diagnosed before using the Electric Cooling Fan Diagnosis.

For more information regarding the Cooling System refer to Engine Cooling Fan Description - Electric, and Cooling System Description in Cooling System.


Here is the electrical schematic and how it all is suppose to work,
If you need any further help please contact me Thank you,Randy If you find this information helpful please give me a good rating

www.aceautomotive1.com

Aug 16, 2008 | 2000 Chevrolet Venture

1 Answer

Cooling fan and ac fan will not run with out suppling 12 volts


i have a saturn sl1 The cooling fan an ac fan will not come on What is the pro

Jul 29, 2008 | 2000 Saturn SL

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