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> 97 960 Coolant Temperature Sensor...
Ontogeny
post Jan 3 2012, 03:27 PM
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The temperature indicator needle in my 97 960 goes to the dead middle between hot and cold when ever the ignition is turned on, be the engine hot or cold. I also have a check engine light coming on. I am assuming that the coolant temperature sensor is bad or has a loose connection, etc. Can I get its exact location instructions from someone please so if I need to order a replacement sensor, I will know where to install it? Obviously I am having trouble locating it. I assume on the engine block somewhere? Thanks in advance.
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Ontogeny
post Jan 3 2012, 03:36 PM
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Oh, I forgot to mention that the electric radiator fan now runs for about 7 minutes after I turn the engine off. I am guessing because it thinks that the engine is over heated and I wonder if this is also running my battery down. Thanks again all....
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SeaMike
post Jan 3 2012, 05:48 PM
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QUOTE (Ontogeny @ Jan 3 2012, 02:27 PM)
The temperature indicator needle in my 97 960 goes to the dead middle between hot and cold when ever the ignition is turned on, be the engine hot or cold. I also have a check engine light coming on. I am assuming that the coolant temperature sensor is bad or has a loose connection, etc. Can I get its exact location instructions from someone please so if I need to order a replacement sensor, I will know where to install it? Obviously I am having trouble locating it. I assume on the engine block somewhere? Thanks in advance.



Welcome
http://www.fcpgroton.com/category-exec/cat...1142/by_year/47

Also, try and get the codes pulled.

It should be under the thermostat (near the engine side of the upper radiator hose)

No, the fan should run, if your battery is running down in that short bit. Have Auto Zone check your battery and alternator for any issue.

It just could be the Temp Sending Unit is sending the wrong signal to the fan... Change the Temp Sending Unit, then see what happens

Mike
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Ontogeny
post Jan 4 2012, 11:20 AM
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It just could be the Temp Sending Unit is sending the wrong signal to the fan... Change the Temp Sending Unit, then see what happens

Mike

Thanks this is what I am thinking. I went to AutoZone Sunday as my old battery bit the dust. Thanks
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odali
post Jan 8 2012, 07:56 PM
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Hello everyone -- New here. This is my first post.

I'm actually doing this job right now --

Will take pictures and post procedure once I get the part.

Should be here middle of the week, so I should be able to get this done by the following weekend.

Couple hints --

Diagnostic System:

Open the hood, look over to your right wheelwell (the one that does not have the battery in front of it) --

You should see two black boxes attached to wires -- one of them is the diagnostic system. It's the one that has a 3ish inch wire coming out of the side with a rounded one plug.
Open the top of that black box, and you will see 6 slots that the plug will fit in, a button, and an LED light (Also, Mine has an A on it, not sure if they all do)....

Plug this rounded plug that's attached to it into slot 2, go and turn your electricity on (don't turn the motor on, just turn the key enough to put on the electric). Come back out and press the button on the diagnostic system once.

This blinks out an error code. It's read as a series of three digets. Each digit is the series of blinks seperated by a 3 second interval. For example:

flash [3 seconds] flash flash [3 seconds] flash flash flash

would be 1-2-3.

this 1-2-3 error code is your coolant temperature sensor.

You can repeat this process to get out all the error codes, and once it starts repeating itself, all of them are out.

There's a manual with these error codes out there. here's one:

http://www.volvoclub.org.uk/faq/EngineOBDCodes.html


Finding the coolant temp sensor:

This is actually under the hose that goes from the radiator to the engine. The hose kind of loops around the power steering module.

You will probably have to take off the metal connector which connects the hose to the engine to get to the temp sensor (mine has 2 torx / star bolts) because even after taking the hose off, it's almost impossible to get to, but if you take off the metal piece, it will be very easy to get to.

Now, the temp sensor is the little bolt looking thing with a wire going into it just below. On my car it looks brass.

You may also want to check to see if the temp gauge (the little springy thing with a gasket around it in the path of the tube you can see once you take the metal piece off) is good -- this piece basically opens up when the engine gets too hot to let in coolant. An easy test is to drop it in some boiling water and see if it opens up. If it does, it's good.

In any event, that's as far as I got today. I ordered the piece today, but it hasn't come yet. I can post picture if needed when it comes.

Hope this helps!

Good Luck!!
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SeaMike
post Jan 8 2012, 11:35 PM
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QUOTE (odali @ Jan 8 2012, 06:56 PM)
Hello everyone -- New here. This is my first post.

I'm actually doing this job right now --

Will take pictures and post procedure once I get the part.

Should be here middle of the week, so I should be able to get this done by the following weekend.

Couple hints --

Diagnostic System:

Open the hood, look over to your right wheelwell (the one that does not have the battery in front of it) --

You should see two black boxes attached to wires -- one of them is the diagnostic system. It's the one that has a 3ish inch wire coming out of the side with a rounded one plug.
Open the top of that black box, and you will see 6 slots that the plug will fit in, a button, and an LED light (Also, Mine has an A on it, not sure if they all do)....

Plug this rounded plug that's attached to it into slot 2, go and turn your electricity on (don't turn the motor on, just turn the key enough to put on the electric). Come back out and press the button on the diagnostic system once.

This blinks out an error code. It's read as a series of three digets. Each digit is the series of blinks seperated by a 3 second interval. For example:

flash [3 seconds] flash flash [3 seconds] flash flash flash

would be 1-2-3.

this 1-2-3 error code is your coolant temperature sensor.

You can repeat this process to get out all the error codes, and once it starts repeating itself, all of them are out.

There's a manual with these error codes out there. here's one:

http://www.volvoclub.org.uk/faq/EngineOBDCodes.html


Finding the coolant temp sensor:

This is actually under the hose that goes from the radiator to the engine. The hose kind of loops around the power steering module.

You will probably have to take off the metal connector which connects the hose to the engine to get to the temp sensor (mine has 2 torx / star bolts) because even after taking the hose off, it's almost impossible to get to, but if you take off the metal piece, it will be very easy to get to.

Now, the temp sensor is the little bolt looking thing with a wire going into it just below. On my car it looks brass.

You may also want to check to see if the temp gauge (the little springy thing with a gasket around it in the path of the tube you can see once you take the metal piece off) is good -- this piece basically opens up when the engine gets too hot to let in coolant. An easy test is to drop it in some boiling water and see if it opens up. If it does, it's good.

In any event, that's as far as I got today. I ordered the piece today, but it hasn't come yet. I can post picture if needed when it comes.

Hope this helps!

Good Luck!!



Let us know if we can help, and Welcome to the forum.
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Ontogeny
post Jan 10 2012, 11:54 AM
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QUOTE (SeaMike @ Jan 8 2012, 10:35 PM)
Let us know if we can help, and Welcome to the forum.



Thanks all and thanks for the information about the location of the sensor and the codes. I can now order same and proceed to fix this problem. Thanks again all!
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