Question about 1997 Mitsubishi Galant
My 1997 mitsubishi galant temperature gauge went to hot, when I turn off the car, it goes back to cold. What's wrong?
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Posted on Jan 02, 2017
Same problem on 2002 Montero XLS. Since manuals are impossible to
acquire, I subscribed to ALLDATAdiy.com (not as good as a Haynes or
Chilton's, but better than nothing). From there I was able to get the
resistance tolerances for the gauge sending unit and computer
temperature sending unit.
The temp gauge sender should have a resistance of 73 ohm at 176 degrees. Since the thermostat is 180, I figured once the engine warmed up, it would be close to that value. The resistance started out at ~700 ohms and gradually dropped to 50 ohms and was still dropping. But it had no wild fluctuations, so assumed it was ok. The computer temp sending unit has a resistance of .26k ohms to .38k ohms. It was rock solid at .24k.
Initially I had replaced the thermostat prior to finding this thread regarding the CPU board problem. Now after checking the resistance, I still wasn't confident that the gauge sending unit was ok (dropping down to less than 50 and still dropping - who knew how the firmware was programmed to translate that data?). Therefore, I went to Carquest and got a new gauge sending unit. Put it in and as you can expect, the problem is still occurring. However, the resistance value of the new one is a rock solid 59.4 ohms. So I question the reliability of the other unit, even though it didn't fix the problem.
AllDATAdiy also mentions a multi-function thermal sensor/switch. Unfortunately, the site does not show where this sensor is located, so I cannot even test.
At this point, I do not feel like taking it in to the dealership and spending money to have my dashboard sent to Michigan (bad design in my opinion that they can't reset/recalibrate at dealership), so I'm going to just buy a separate temperature gauge to mount under the dash. At least I will have peace of mind on the actual temperature. Although I have a feeling at some point in the future I will be replacing the circuit board in question since other gauges in the cluster will probably begin flaking out as well.
Posted on Sep 06, 2008
The loud whine you speak of indicates one of two things a bad serpentine belt or alternator, The first thing would be to check the belt.Look for cracks worn spots or glazing. If the belt looks ok then take the belt off and start the engine for a minute or so and listen for noise.
Posted on Jan 01, 2009
You need to have your transmission serviced. The fluid has gotten so thick in there that it builds up too much pressure and your transmission will either kick it out of gear or blow up. I'm glad it actually still works. Once the oil warms up it thins right out and it works no prob. Just service your tranny, and you'll be fine.
Posted on Apr 24, 2009
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