Top 10 1997 Cadillac Eldorado Questions & Answers

P0110 - Intake Air Temperature (IAT) Sensor Circuit

P0111 - Intake Air Temperature (IAT) Sensor Performance

P0112 - Intake Air Temperature (IAT) Sensor Circuit Low Voltage

P0113 - Intake Air Temperature (IAT) Sensor Circuit High Voltage

P0114 - Intake Air Temperature Circuit Intermittent ,hope this helps you

The solution is more than likely a new blower motor. Replacing this blower motor is no small task. I am in the process of doing it, but there is so little wiggle room that I suspect that if a cadillac mechanic does this job, they will jack up the engine/transaxle to make room. The motor itself is not cheap either, a replacement Delco is well over $200. I will let you know if my new motor install works.

70 psi static does need a charge.find compressor relay, jump relay and compressor will start. add refrigerant,replace relay and a/c should work fine

P0305 IS # 5 CYLINDER MISFIRE DETECTED.P0135 IS BANK 1 SENSOR 1 OXYGEN HEATER CIRCUIT FAILURE

please have the car put on diagnosis machine so that it can be seen exactly what the problem is! could be the steering angle sensor calibration!

remove ac vents with flat head screwdriver . thair should be a 7mm bolt in each vent holding tha dash pad on remove them. remove the trim going to head liner from the dash pad. use a 7mm to remove the bolts holding the cluser in place should be one each side and 3 across the back . disconnect the wiring harness and your done. also disconnect the negative batery cable when doing this

Make sure the air in the cooling system is bled out,and make sure the cooling fans are coming on,and going off on there own.If they come on,they have to go off too,when it cools down.If the cooling fans do not come on,bled the cooling system,and replace the coolant sensor,this tells the computer to activate the cooling fan relays.Also check the fuse,and the cooling fan relay.

I'm assuming you have the Northstar engine.

My experience on replacing the water pump is with a 1998 STS but this should apply to your car too.

First of all,you will need the Northstar waterpump removal tool, You can get this from most reputable auto part stores.


You need to remove the air filter housing and ducting to gain easy access to the pump.

Remove the shield covering the pulley and belt. The belt is easily removed by levering the tensioner pulley.

The water pump is located at the lower radiator hose manifold where you will also find the thermostat.Remove the manifold cover and you will see the water pump.

Insert the removal tool over the pump making sure it is locked in position.You will need to use a breaker bar on the removal tool and turn the tool CLOCKWISE to release the pump (1/4 turn), or if you imagine the breaker bar being vertical, push towards the windscreen of your car,it takes quite a bit of force to unseat the pump hence the use of a breaker bar.

Installing the new pump does not require as much torque as removing the old one.
Tighten the new pump to 73 ft.lbs. making sure it is seated properly before tightening.

Don't forget to clean out the water pump housing prior to installing the new pump and don't forget to include a new water pump gasket and housing cover gasket.

It is also a good idea to install a new thermostat while you're at it.

Removal & Installation To Remove:

1. Before servicing the vehicle refer to the precautions at the beginning of this section
2. Remove or disconnect the following:
   • Engine coolant into a suitable container to a level below the ECT sensor
     
     
   • ECT sensor harness connector (A)
   • ECT sensor

To Install:
NOTE: Use care when handling the coolant sensor. Do not drop damage to the coolant sensor will affect the operation of the fuel control system.
NOTE: Replacement components must be correct for the application. Components requiring the use of the thread locking compound, lubricants, corrosion inhibitors, or sealants are identified in the service procedure. Some replacement components may come with these coatings already applied. Do not use these coatings on components unless specified. These coatings can affect the final torque which may affect the operation of the component. Use the correct torque specification when installing components to avoid damage.

1. Coat the sensor threads with GM P/N 1050805 sealer or equivalent
2. Install or connect the following:
   • ECT sensor
     1. Torque to: 15 lb-ft. (20 Nm)
   • ECT sensor harness connector
   • Engine coolant
3. Start the engine then idle until normal operating temperature is attained.
4. Recheck coolant level and top off as needed.
5. Test drive the vehicle.

--- I couldn't find a reference for the 'fan coolant relay switch' although I'm sure there is one on this car.

the module is actually the head unit in the center of the dash there is a electronic speed control module that will be located on top the interior heater box behind the glove box unless you are lucky enough too have one that was actually assembled in the states those units that where are located under the hood on the outside blower box passenger side of car close to the valve cover side of the box