Question about 1998 Saturn SL

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Looking for cooling system sensor - 1998 Saturn SL

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There are two screwed into the driver side end of the head, just above where the bell housing bolts onto the block. one turns on the fan, the other connects to the car's system for gauge..

Posted on Mar 18, 2011

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Posted on Jan 02, 2017

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I had problem with my cooling system. After I traced out, I found out that my cooling fan is not working properly. At first, I thought it didn't work at all. But after testing the relay, it is in fact,...


You haven't mentioned the year and make/model of the vehicle. Does it overheat when you are driving? What happened to make you look for a problem with the fan? Some vehicles have the fan come on with the AC to cool down the condenser at the front of the vehicle so I wouldn't bother looking there. Usually when a cooling fan won't come on when the coolant is hot it's because of a faulty temperature sensor. This can be tested by locating the sensor, unplug the connector and short it out, but again it depends on the make and model. Most just have two wires that can be shorted to test the fan but some will ground out a single wire. I could go on and on but without more info I can't tell you any more. Your best bet is to search for the information about your cooling electrical system to find out what type of sensor it has and how to test it. My bet is on a damaged/defective sensor since we know that the fan is working fine. Sometimes a bad connection on the sensor will cause this.

Nov 09, 2013 | Cars & Trucks

1 Answer

2003 VENTURE RADIATOR COOLING FAN SWITCH


the sensor located at thermostat housing is for the temp gauge..i am still looking for this myself

Apr 11, 2012 | 2000 Chevrolet Venture

1 Answer

2002 Buick LeSabre Custom. Cooling System had brown chiffon looking foam in radiator. Drained and flushed cooling system with water. Disconnected both heater hoses and forced water through in both...


The brown looking chiffon could be oil in the water. However, if you are sure the system is ok then I would check the actuator door motor on the heater and make sure it is allowing the heat into the car. Seems as if you have done as much as you can.

Apr 22, 2017 | 2002 Buick LeSabre

1 Answer

My cadillac deville(2001)runs smooth,but it runs hot.what is the problem?


Insufficient or weak coolant, bad thermostat (out of range), cooling fan not running or kicking into 2nd phase with A/C on, bad temperature sensor, bad temperature sending unit.(false guage reading).
Start by checking your coolant level and color (nice and green or orange? not rusty looking?) if rusty looking, flush coolant system and refill with recommended coolant type of 50/50 mixture.

Check specific gravity of coolant to see if the mixture is weak.

Verify cooling fan is kicking on after engine reaches operating temperature with engine idling.

Replace thermostat.

Measure resistance of temperature sensor. (should slowly raise as engine heats up)

Measure voltage at sending unit. (should slowly raise as engine heats up)

One of those should solve it, I always lean toward weak coolant and bad thermostat. I have seen bad water pumps do that too.

Mike

Jun 14, 2011 | 2000 Cadillac DeVille

1 Answer

Coolant running out To quick causing van to overheat


Have system pressure checked first, your looking for leaks , a bad head ,a defective water pump. Next make sure cooling fan is operating and operating correctly. Items that affect cooling fan are coolant temperture sensor and relay and the circuit and fan itself. If area by thermostat is bottle necked chances are you have a defective thermostat .

Aug 10, 2010 | 2000 Oldsmobile Silhouette

1 Answer

Cooling fan continues to run after turning off ignition


For how long does the fan run after you remove the keys from the ignition?
It is cooling your system... but for how long. Too long will drain your battery. There is an sensor on the engine that activate the fans. If the fans are running more than 3min, change that sensor. Also check to see if you have enough antfreeze in the system. If not enough.. the cool fluid won't reach the sensor to signify that the system is cool.
Check fluid first, then the sensor

Jul 25, 2010 | 2000 Kia Sephia

1 Answer

How to change the radiator fan?


Electric Engine Fan - Fan Switch

Removal & Installation
2.7L Engine
  1. Disconnect negative battery cable.
  2. Partially drain cooling system.
  3. Disconnect the electrical connector .
  4. Remove engine coolant sensor from coolant outlet tube .
To install:
  1. Apply thread sealant to sensor threads.
  2. Install engine coolant temperature sensor into coolant outlet tube.
  3. Tighten sensor to 20 ft. lbs.(28 Nm) torque.
  4. Connect electrical connector to engine coolant temperature sensor .

3.2L And 3.5L Engines
  1. Disconnect negative battery cable.
  2. Partially drain cooling system.
  3. With the engine cold, disconnect coolant sensor electrical connector.
  4. Remove sensor.
To install:
  1. Install engine coolant temperature sensor.
  2. Tighten sensor to 20 ft. lbs.(28 Nm) torque.
  3. Attach electrical connector to sensor.
  4. Connect negative battery cable.
Removal & Installation
  1. Disconnect negative battery cable.
  2. Partially drain cooling system.
  3. Remove upper radiator hose.
  4. Disconnect cooling fan electrical connector.
  5. Remove cooling fan mounting bolts.
  6. Remove radiator cooling fan assembly from vehicle.

    f9d971c.jpg
    Fig. Removal and installation of the radiator fan-2.7L Engine shown
To install:
  1. Position radiator cooling fan assembly in vehicle.
  2. Install cooling fan mounting bolts. Tighten to 50 inch lbs. (6 Nm)
  3. Connect cooling fan electrical connector.
  4. Install upper radiator hose .
  5. Fill cooling system.
  6. Operate engine until it reaches normal operating temperature.
  7. Check cooling system and automatic transmission for correct fluid levels.

Hope helps (remember comment and rated this).

Jul 13, 2010 | 2001 Dodge Intrepid

1 Answer

Error code powertrain cooling system. where do i start looking


What are you looking for? The power train cooling system is the radiator, Hoses , water pump fan . . Just fancy terminology for the radiator.

Oct 10, 2009 | 2004 Chevrolet Impala

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

Radiator


Hi.

I can't see how it can possibly be related.

O2 sensor is on the exhaust.

Radiator and cooling system completely separate.

It may be worthwhile getting a new temperature sensor for the fan if this is installed into the radiator.
New hoses and clamps are sometimes - but not always needed. Check condition of these before changing over.

If this helps please take time to rate as fixya if it helped. Or useful if it helped a little.
Thanks.

Jun 14, 2008 | 1993 Honda Civic 4 Door

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