Scangauge II auto transmission fluid temperature.

[Jaymon]

Hi all

I know this has come up a fair few times now. And even before getting my scan gauge nearly 2 years ago I remember seeing people being able to get atf temp on their scangauge.

I have tried it once before and was unable to do it... Was probably doing it wrong. Could someone point me in the right direction to the instructions to get atf temp to show on the scangauge.

Thanks
Jaymon

[nj swb]

Try this:

Wes,

Scangauge II Code for Auto Trans Fluid temps.

TXD 07E12102
RXF 032100000000 (that's 8 zeros)
RXD 2008
MTH 00010001FFD8

cheers, OJ.

[TC.Barky]

http://www2.pajeroclub.com.au/forum/showthread.php?t=20229&page=7&highlight=change+your+mth+data

TXD: 07E12102
RXF: 032100000000
RXD: 2008
MTH: 00010001FFD0
Name: ATF

The code NJ posted works but its for the NS so is slightly innacurate on the NT/NW/NX

[74HJLS]

This is the one I was given for the NT. It works for me.

Scan gauge ATF
TXD. 07E12102
RXF. 032100000000
RXD. 2008
MTH. 000100001FFD0
Name. ATF

[HeavyPizzaz]

Reviving an old relevant thread rather than starting a new one...

Seen elsewhere that you can check the SGII is working okay for ATF temp on an NX by checking ambient temps in the morning.

The other morning, my water temp was 21, intake was 20 and ATF was 24. This was less than 1min after I started the car after an overnight cooldown.

Is 3 - 4 degree difference a case of "close enough is good enough?", or are most people's SGII showing all 3 temps on par?

I have MTH as 000100001FFD0.

Cheers.

[nj swb]

Whenever I remember to check, I turn the ignition on and wait for the ECU to report numbers before I start the engine.

Most of the time I get all three numbers (intake air, coolant and transmission temps) exactly the same, but sometimes it seems like there is "residual heat" i.e. air is slightly cooler than coolant, is slightly cooler than trans. I put that down to the trans being better "insulated" by the body, and the coolant having higher thermal mass than the intake air sensor - so intake air sensor cools faster than the coolant, which cools faster than the transmission.

Since I posted in this thread over three years ago we've learned a bit more about the offsets required. In OJ's post, no doubt referring to the Jatco transmission in his Challenger, the offset is -40 - that's FFD8 in unsigned hexadecimal.

As TC Barky pointed out, the Aisin transmission used in later Gen 4 diesels requires a different offset, which is recorded in many places as FFD0, or -48. For Torque Pro, which I'm using, the formula is given as -50. M_and_m did some work with his MUTT, and concluded that -50 is the correct offset for the Aisin transmission, which is FFCE. So your MTH should be 00010001FFCE (which apparently means "multiply by 1, divide by 1, add -50").

Try that MTH, and wait for your Scangauge to report all the numbers before starting your engine in the morning.

[HeavyPizzaz]

As TC Barky pointed out, the Aisin transmission used in later Gen 4 diesels requires a different offset, which is recorded in many places as FFD0, or -48. For Torque Pro, which I'm using, the formula is given as -50. M_and_m did some work with his MUTT, and concluded that -50 is the correct offset for the Aisin transmission, which is FFCE. So your MTH should be 00010001FFCE (which apparently means "multiply by 1, divide by 1, add -50").



Try that MTH, and wait for your Scangauge to report all the numbers before starting your engine in the morning.

Thanks heaps mate. I’d read the 0 vs 8 threads but must have missed the FFCE ones. I will try that tonight / tomorrow morning and take your point re: starting. Thanks again!!



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[HeavyPizzaz]

Thanks again, this morning was 24 intake, 24 water, 25 ATF


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[Robbo84]

I just put these into my 16 nx. And it's reading lower than the intake and coolant, It was only 2 degrees lower. Any ideas?

[Dicko1]

I just put these into my 16 nx. And it's reading lower than the intake and coolant, It was only 2 degrees lower. Any ideas?

In the overall scheme of things 2 degrees is nothing. oil will cool down at a different rate to water and different casing materials and thickness,s will also affect the rate. Ambient temp will play a part. I see 1 or 2 degrees difference at timrs om my NW with the Ultragauge..it works absolutely fine. You have nothing to worry about.