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Old 12-05-2008, 06:20 PM
tinypanzer tinypanzer is offline
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Join Date: Jul 2008
Posts: 1,236
Hi,

There are two coolant temp sensors, both located on the top of the engine near the back. The single pole sensor goes to the temp. gauge in the instrument cluster. The 4 pole sensor contains two elements, one for the timing and one for the fuel injection. The elements are identical, and should both read the same value.

As far as what resistance you should measure, that depends on the temperature. These sensors have a negative temperature coefficient. That means that as temperature goes up, resistance goes down.

Check out these images.... Measure across the points shown on the diagram then compare the value to the chart. You should be very close to the value listed for your given temperature. It will be much easier if you do this at ambient temperature since then you will know exactly what value you SHOULD be getting.

Again, both sensors should give you the same value. If they are significantly different, replace it.

If you wanted to be really thorough, you could get the car warmed up and see if the temp sensor matches a reading from an IR thermometer or similar.


Good luck!
Attached Thumbnails
Hard to start when warm-sensor.jpg   Hard to start when warm-chart.jpg