I have a 2002 Mitsubishi Montero XLS. The other day the temperature gauge went from normal temp to Max HOT. The radiator is still cool enough to touch, it is not boiling over, and there is still coolant in the resivour. The gauge would go back down to normal in a few minutes, but now it immediately climbs to Max Hot within 1-2 minutes of turning the car on.
Any help would help since there are no repair manuals available on this year as of yet.
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.
I just had the exact same problem. Thought it was the thermostat, replaced with seal & blew the air out. Still showed over heating, called Mitsubishi service said they have had to replace the CPU gauge boards on many Montero's and they require programming before installation nice so I ordered a new one and had it programmed & I am required to send the old CPU back for a core charge. Total cost for this repair $867.94 computers are expensive
I just got my Montero back today after having it sit at the dealership for a week. I too had to have it sent to Michigan for re-calibration/reprogramming. The cost was $100.00. The dealership charged me $95.00 to uninstall and reinstall the computer. The part (MR532787) costs $225.27. The only thing now is that the miles to empy gauge where the compass and clock is read 367 miles to empty. I had 1/3 tank of gas in the tank. I filled up and the number didn't change. I;mtrying to find a way to reset the gause. Maybe I'll take the battery cable off tomorrow and re-connect after maybe 30 minutes to see if it rectifies it
×
I fixed mine simple, look on youtube. There is a small resistor that is dry soldered. its on the back of the instrument cluster simple touch with a soldering iron and works like a dream.
Dont pay all the money just find the video and hey preto your done. Took me 20mins. Nick
My friend got the same problem in his SUV.but when i fix that,i don't really think that i furtunately found the problem.you don't need to worry to spend a lot of money just to fix that very small problem that can coz you a lot of head ache. just do this way. 1) open the circuit board and check if there's electrecal line discolored.(if does,you need to check it carefully if the is line was cut or still intact). 2) just retight the screwbolt connected to the temperature indicator. or clean the screwbolt befor you tighten it. 3) if it is doesn't work,replace the two or three resistor connected in the indicator .(it doesn't cost you a $1.)
that's all what i did,then everything runs ok.it looks like unbelievable isn't it? but try it,there's nothing to lost you.i did this not only once.
pls.send me an email if this remedy works on your car.([email protected])
Same problem, I've been told by the dealer it isn't running hot, but it has a faulty circuit board...can be replaced for $300 w/ labor...I am still trying to find the part online and some info on how to replace it once I have it....so any info on that would be great
Hello there to all that is having the problem with the montero very common on these enough to know about them worked at a mits dealer for over 8 years and can tell you its the cpu behind the gauge cluster most mits dealers if they are doing their job right will have that part in stock but they do need to send the gauge cluster out for the new burn in cluster of mileage, but to save you the labor if you pull the gauge cluster itself go buy the part then you can have them send it out for you that alone will save you about 100.00-150.00 depending on what they charge
I just got my Montero back today after having it sit at the dealership for a week. I too had to have it sent to Michigan for re-calibration/reprogramming. The cost was $100.00. The dealership charged me $95.00 to uninstall and reinstall the computer. The part (MR532787) costs $225.27. The only thing now is that the miles to empy gauge where the compass and clock is read 367 miles to empty. I had 1/3 tank of gas in the tank. I filled up and the number didn't change. I;mtrying to find a way to reset the gause. Maybe I'll take the battery cable off tomorrow and re-connect after maybe 30 minutes to see if it rectifies it.
×
this is the coolant temp sensor, it sends a signal to the engine ECU
8,085 views
Usually answered in minutes!
This gets better and better! I replaced the CPU board and it fixed the temp gauge problem, but now I have no speedometer or odometer. Evidentally, if you replace the CPU, you have to send the new CPU AND the Instrument Cluster back to the factory to be reset with your current mileage and your gauges reset. This is another $300+ process or so I'm being told.
Anyone out there that has had this problem before, and if so, is there an alternate fix??
I have a 2002 Mitsubishi Montero Limited.
The other day the temperature gauge went from normal temp to Max HOT.
The radiator is still cool enough to touch, it is not boiling over, and
there is still coolant in the resivour. The gauge would go back down to
normal in a few minutes, but now it immediately climbs to Max Hot
within 1-2 minutes of turning the car on.
I have a 2001 Montero with the same problem. I replaced the fan clutch and the temperate sensor. I am about to replace the water pump, but I doubt that fixes the problem. My vehicle does not seem to be atually getting hot, but the temp gauge jumps to "H" within seconds of starting sometimes. It does go back down to normal and usually jumps when I am at a stop light. How much is a CPU?
radiator fans is not working
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.
enternal temp gauge max out but engine does not get hot?
I just got my Montero back today after having it sit at the dealership for a week. I too had to have it sent to Michigan for re-calibration/reprogramming. The cost was $100.00. The dealership charged me $95.00 to uninstall and reinstall the computer. The part (MR532787) costs $225.27. The only thing now is that the miles to empy gauge where the compass and clock is read 367 miles to empty. I had 1/3 tank of gas in the tank. I filled up and the number didn't change. I;mtrying to find a way to reset the gause. Maybe I'll take the battery cable off tomorrow and re-connect after maybe 30 minutes to see if it rectifies it
×