Coolant level sensor

Two cooling fans controlled by three relay's . If only one fan is working ,that could be a problem .
Coolant Level Sensor Description
The coolant level sensor monitors the coolant level in the cooling system and indicates if the coolant is low. This sensor is located at the base of the radiator surge tank and is not serviceable.
CHECK COOLANT LEVEL (2)
The IPC receives a discrete input from the engine coolant level switch. The engine coolant level switch is normally closed. When the engine coolant is low, the engine coolant level switch opens. When the IPC receives an open signal from the engine coolant level switch, the IPC displays the message on the DIC.

Relay Driven Dual Cooling Fan Diagnostics There are using a pontiac , by your cadillac is the same .

Hi Marina,

This sounds like a low coolant (anti-freeze) level related problem.

After the car has been sitting for hours and the engine is COLD (over night is ideal), check the coolant reservoir of the car. Fill the reservoir with a 50 / 50 mixture of coolant (a type approved for use in your car) and water to the COLD line.

Remove the radiator cap - again - the engine MUST be COLD. The coolant should be visible about 1 - 2 inches in the radiator filler neck. Top off the radiator with a 50 / 50 coolant and water mixture as needed to get to the 1 - 2 inch level described above.

Leave the cap OFF and start the engine.

Turn the heat to HOT and fan on.

You should begin to see the coolant in the radiator begin flowing as the engine warms up. If at any time the coolant level in the radiator drops, add additional 50 / 50 coolant and water mixture as needed to get to the 1 - 2 inch level described above previously.

As the engine warms, the coolant will expand slightly and may begin to overflow from the radiator filler neck. At this point, replace the radiator cap SECURELY. If you needed to add coolant at any time in these steps you should have heat now. If not, try driving the car until the car engine reaches normal operating temperature.

If you're still unable to get heat, there may be a clog in the heater core or hoses that supply it; air trapped in the heater core circuit or other issue that will need a mechanic to repair.

Regardless if you have heat or not: Check for puddles of coolant under the car. You may have an inexpensive repair to fix a leaking hose or fitting. After the engine is hot check the exhaust pipe for white wispy "smoke". When first starting, this is common - but after hot - the exhaust should be clear. Wispy "smoke" is really steam from coolant leaking into the combustion chamber. This could be the cause for your coolant loss. This also indicates a much more expensive repair problem or either a damaged head gasket $$ or cracked engine block $$$$.

Good luck!

Hi Tammie, Is the coolant level low ? If not , The engine coolant level switch grounds the indicator with the coolant level in the coolant reservoir below the minimum recommended level. The engine coolant level indicator module is on the right side of the radiator just down below from the radiator cap !
Low Engine Coolant Indicator Always On

Step

Action

Value(s)

Yes

No

1

1. Disconnect the engine coolant level indicator module connector.
2. Turn the ignition switch to the RUN position.

Is the low coolant warning indicator ON?
--
Go to Step 2
Go to Step 5

2

Inspect for a short to ground in CKT 68.

Does a short to ground in CKT 68?
--
Go to Step 3
Go to Step 4

3

1. Repair the short to ground in CKT 68.
2. Inspect the system.

Is the repair complete?
--
System OK
--

4

1. Replace the instrument cluster. Refer to Instrument Cluster Replacement .
2. Inspect the system.

Is the repair complete?
--
System OK
--

5

1. Replace the engine coolant level indicator module. Refer to Coolant Level Module Replacement in Engine Cooling.
2. Inspect the system.

Is the repair complete?

the vibration may be from air in the power steering pump or faulty steering rack controls . Check fluid level in reservoir for starters . The second is a problem with the coolant fan not working properly. If you have a viscous fan hub --replace it as it is not working at idle ( just spinning but not pulling air through the radiator or the temperature sensor for the coolant is inoperative or the fan relay is faulty.

you need to replace thermostat and radiator cap.look under hood around engine compartment.look for a radiator cap near radiator,add 50/50 antifreeze and water to coolant system to bring up boiling point.pure water will cause engine run hotter because water evaporate away,remove radiator pour coolant in the radiator until coolant stop dropping in the radiator now some vechicle pour coolant in the coolant overflow jug,pour coolant until coolant level stop dropping and the coolant level stay at cold full mark.start engie let idle few minutes, watch coolant level in radiator if coolant start dropping add more coolant, when coolant level stop dropping put radiator cap back on let engine idle until both top radaitor hose and bottom coolant hose get warm turn off engine wait until it get cool then take a large rag slightly open radiator just a litle at a time to keep from getting scaled.once radiator remove add more coolant if low,put radiator cap back on start the engine let it idle watch the temp gauge if temperature gauge going hot zone stop engine wait until cool then add more coolant,keep doing this until engine stop overheating going into hot zone and coolant level stop dropping,make the coolant overflow jug coolant level stay at full cold mark, dont let jug run empty if so air will get in the coolant system causing engine to overheat.

These are the steps to replace the thermostat but are applicable to remove and replace the housing also. 2.0L DOHC Zetec Engine WARNING Do not mix Standard (green) Coolant with Extended Life Coolant (orange). If mixing occurs, drain engine cooling system and refill with originally equipped coolant type. If this contamination occurs the service change interval on Extended Life Coolant will be reduced from 6 years/150,000 miles to 3 years/30,000 miles.

1. Disconnect the battery ground cable.
   
2. Drain the engine coolant to a point below the water thermostat.
   
3. Disconnect the connector from the camshaft position sensor.
   
4. Remove the bolts and move to one side the water hose connection.
   

Remove the water thermostat and seal from the water thermostat housing.

Inspect the seal and the water thermostat.

To install:

1. Replace the thermostat and seal into the housing.
   
2. Connect the connector to the camshaft position sensor.
   
3. Fill the cooling system.
   
4. Start the engine and check all hoses and connections for leaks. Allow the engine to warm up so that the water thermostat opens.
   
5. Stop the engine. Top off the coolant recovery reservoir as necessary to maintain minimum cold fill level.
   

2.0L SOHC Spi Engine

1. Disconnect the battery ground cable.
   
2. Remove the air cleaner outlet tube.
   
3. Drain the engine coolant to a point below the water thermostat.
   
4. Disconnect the water temperature indicator sender unit and the engine coolant temperature sensor electrical connectors.
   
5. Disconnect the upper radiator hose and the heater coolant hose from the water thermostat housing.
   
6. Remove the water thermostat housing bolts, the water thermostat housing, and the water thermostat.
   

To install:
NOTE Make sure all of the gasket surfaces are free of all gasket material. Make sure the tabs on the engage properly into slots in thermostat housing.

1. Install the thermostat housing bolts, thermostat housing and the thermostat.
   
2. Connect the upper radiator hose and the heater coolant hose to the thermostat housing.
   
3. Connect the water temperature indicator sender unit and the engine coolant temperature sensor electrical connectors.
   
4. Fill the cooling system with only Ford Premium Engine Coolant E2FZ-19549-AA (in Oregon F5FZ-19549-CC, in Canada, Motorcraft CXC-8-B) or equivalent meeting Ford specification in a 50/50 mixture with water.
   
5. Start the engine and check all hoses and connections for leaks. Allow the engine to warm up so that the water thermostat opens.
   
6. Stop the engine. Top off coolant recovery reservoir as required to maintain minimum cold fill level.
   

bad low coolant switch or still low on coolant.

Engine Cooling The cooling system components are the:

• engine coolant temperature sensor (ECT sensor) (12A648)
• radiator (8005)
• degas bottle (8A080)
• radiator draincock (8115)
• water pump (8501)
• water temperature indicator sender unit (10884)
• water thermostat (8575)
• dual speed fan motor assembly

The water pump circulates the coolant.
The water thermostat:

• controls the engine coolant temperature.
• allows quicker engine warm-up.

The degas bottle:

• provides a location for fill.
• contains coolant expansion and system pressurization.
• provides air separation during operation.
• replenishes the engine coolant to the system.

The fan motor (8C607):

• operates only when the ignition switch is in the RUN position.
• will not operate with the switch in the OFF position.

The engine coolant flows:

• from the lower radiator hose (8286) to the water pump.
• from the water pump to the engine block and the cylinder heads.

A closed water thermostat returns the engine coolant to the water pump; an open water thermostat allows the engine coolant to flow to the radiator.
Engine coolant provides freeze protection, boil protection, cooling efficiency and corrosion protection to the engine and cooling components. In order to obtain these protections, the engine coolant must be maintained at the correct concentration and fluid level in the degas bottle.
When adding engine coolant, use a 50/50 mixture of clean, drinkable water and engine coolant.
To maintain the integrity of the coolant and the cooling system:

Hi,

First, DO NOT open coolant system while vehicle has been running...Danger of sclading

Make sure radiator fluid is at its proper level. vehicle being low on coolant can cause this problem.

If coolant was low (indicates a leak in radiator system); suspect a leaky radiator cap, coolant reclaimer, or bad radiator hoses.

If the problem appears to be anything other than low coolant, or a leaky radiator cap (cheap checks); it's very easy to start chasing your tale on coolant issues, and too expensive to be second guessing. Best thing at that point would be to go to a local trusted mechanic.

Water pump could also be leaking; but not likely since the vehicle is too new.

HTH,
Mike...

Check all radiator hoses and the radiator itself for small leaks. You could try an over the counter stop leak to see if that helps. On big leaks this is not recomended , but in small leaks it could svae your car from losing any more anti freeze.

I Suspect that you have AIR in your COOLING SYSTEM Fallow Procedures BELOW to Insure there is NO AIR IN COOLING SYSTEM


Draining and Filling Cooling System

Draining Procedure

Important: Do NOT add any engine coolant supplement sealant pellets to the cooling system. Drain and refill the engine cooling system every 5 years or 240,000 km, (150,000 mi) , whichever occurs first.

1. Park the vehicle on a level surface.
2. Remove and clean the coolant recovery reservoir.

Caution: Refer to Radiator Cap Removal Caution in Service Precautions.

1. Remove the radiator cap when the engine is cool:

3.1. Slowly rotate the cap counterclockwise to the detention tab. Do not press down while rotating pressure cap. 3.2. Wait until any residual pressure, indicated by a hissing sound, is relieved. 3.3. After all hissing stops, press down on the radiator cap and rotate the cap counterclockwise in order to remove the cap.
Important: Recover and store used coolant in a used coolant holding tank and submit the used coolant for recycling on a regular basis. Do NOT pour used coolant down the drain. Ethylene glycol antifreeze is very toxic. Disposing of ethylene glycol into the sewer system or ground water is both illegal and ecologically unsound.

1. Place a drain pan under the radiator drain valve in order to collect all of the used coolant.
2. Open the radiator drain valve located at the bottom of the radiator tank. If only partial cooling system draining is required, drain enough coolant to perform the procedure.
3. Open the air bleed valve on the thermostat housing 2 full turns
   1. Open the air bleed valve above coolant pump 2 full turns.
   2. Place a drain pan under the engine block drains in order to collect the used coolant.Important: Allow the coolant to drain completely.
      
      
      1. Remove both of the engine block drains.
      • The front left engine block drain is located between the starter motor and the engine oil filter.
      • The rear right engine block drain is located near the crankshaft position sensor.
      Filling Procedure
      Reinstall the engine block drains
      
   3. Close the radiator drain valve,
      1. Install the coolant recovery reservoir. Notice: When adding coolant, it is important that you use GM Goodwrench DEX-COOL or HAVOLINE DEX-COOL coolant. If Coolant other than DEX-COOL or HAVOLINE DEX-COOL is added to the system the engine coolant will require change sooner; at 50,000 km (30,000 mi) or 24 months.
      2. Slowly add a 50/50 mixture of GM Goodwrench DEX-COOL or HAVOLINE DEX-COOL and clean, drinkable water to the radiator until the coolant level is at the base of the radiator fill neck.
      3. Wait for 2 minutes and reinspect the level of the coolant in the radiator. If necessary, add coolant to the radiator until the coolant level is at the base of the radiator fill neck.
      4. Install the radiator cap.Ensure that the radiator cap arrow points toward the radiator overflow tubeImportant: The air bleed valves are brass. Do NOT over-tighten the air bleed valves.
         
         
         1. Close the air bleed valve above the coolant pump.
            1. Close the air bleed valve on the thermostat housing.
            2. Fill the coolant reservoir with a 50/50 mixture of GM Goodwrench DEX-COOL or HAVOLINE DEX-COOL and clean, drinkable water. Caution: Refer to Radiator Cap Removal Caution in Service Precautions. Important: If the coolant temperature indicator turns ON, turn the engine OFF immediately and allow the engine to cool. Do NOT remove the radiator cap.
            3. Start the engine and allow the engine cooling fan to cycle on and off 3 times. If the low coolant indicator does not turn OFF and the coolant level is above the Full Cold mark on the coolant recovery reservoir, refer to Engine Coolant Temperature Gage Inaccurate or Inoperative.
            4. Turn off the ignition.
            5. Allow the engine to cool.
            6. Ensure that the engine coolant concentration is sufficient.