#Monitor coolant temp pc driver

Though the baseline operating temperature is 95✬, the electrically controlled t-stat allows normal operating temperature to fluctuate in the 75✬-113✬ range depending on driver input and operating conditions. This is merely a result of the 'new normal' gauge behavior that this modification seeks to achieve.

#Monitor coolant temp pc how to

*Take a mental note of the corresponding needle positions and temperatures in the chart above so that you know how to read the reprogrammed gauge, which will now be much more sensitive in the upper range. The upper range is, of course, not observed, but we can assume that the needle will move accordingly. Bottom Hash Mark-Upper Limit of Blue-2nd Hash Mark-12 o'clock-3rd Hash Mark-Lower Limit of Red-Red (Maxed Out/Light On): HexaDecimal 14 19 1E 23 28 2D 32 37 3C 41 46 4B 50 55 5A 5F 64 69 6E 73 78 7D 82 87 8Cįor example, if you want to eliminate the buffer altogether and make needle behavior in the upper range almost linear, here's another option (added on 11/23): I used the values shown above, but you may want to play with upper range values depending on your driving style and operating conditions.

The first set of instructions that follows can also be found in this thread ():īut I could not find offset 0x34D (nor 0x340) in my EEPROM so I sent him a line that looked very similar:Ġx0F0: OF 00 32 1F 4B 5A 73 5A 7C 94 7D A4 06 0E 1E 0Fįactory 0x0F0: 0F 00 32 1F 4B 5A 73 5A 7C 94 7D A4 06 0E 1E 0F TerraPhantm is responsible for most of the useful information that follows. By all accounts, the baseline operating temperature for these cars is 95✬. Furthermore, because the lower limit of the buffer range will be set at 90✬ instead of the factory preset of 75✬, the driver might be less inclined to flog the engine before it reaches operating temperature. You'll also have more advanced warning of overheating and, therefore, more time to shut the engine down. After you perform this modification, you'll know if you have a soft failing t-stat by simply looking at the gauge. It does so by setting the buffer range to 90-100✬ instead of the factory programmed range of 75-115✬ and also by adjusting the lower and upper ranges of the gauge. TerraPhantm has made it possible to reprogram the temperature gauge to behave in a more linear manner, which provides the driver with a more accurate representation of what's happening under the hood. Given the relatively high failure rate of t-stats and other cooling system components on the e46, performing this revision can help avert catastrophe.

Secondly, an upper limit of 115✬ for the buffer range doesn't give the driver much time to shut off the engine in the event that it overheats.

This was true on my wife's car, which ran in the 77-87✬ range without turning on the service engine soon light (SES). Your needle will stay at the 12 o'clock position even if you have the all-too-common soft failing thermostat (See jfoj's excellent thread () on this issue and related problems ). This is problematic for at least a couple of reasons. The 12 o'clock position represents the buffer range, which means that the needle will stay at this position when the coolant temperature is between 75✬ and 115✬. Many e46 owners complain that the non-M coolant temperature gauge is practically useless given its wide buffer range (75✬-115✬) and high range settings.

More or a history/business guy so I am not good at the hexadecimal stuff they are talking about in the thread.

#Monitor coolant temp pc code

I will be doing this myself as soon as I learn how to code our cars. Found this over on E46 fanatics and thought it was very valuable here seeing as how our temp gauge is pretty useless.