OBD 2 Transmission temp

Michael.
I also, would keep the Scangauge as it is DIRECTLY accessing the ECU information and is not able to be corrupted OR send spurious signals to ECU to trigger false info and limp modes while wrongly showing all is well. Any tablet only shows what whatever signals the OBD dongle transmits and that can be questionable and you would not be aware if it is incorrect. Lovely to see a big dial but if it is BS, where does that leave you and how do you solve a problem which isn't there?

Hi Kazza & RMD,
I already have an OBD2 dongle that came with my new head unit. It works perfectly however does not read Auto Trans Temp. So I know they work. I just have to do research to find the one that suits my needs. I will also keep the Scangauge but only plug it in when I need to get a second opinion.

Michael
It might be that the dongle which reads all the ECU info is ok but the Head unit isn't instructed to read it. HAve you tried that dongle with a program on a tablet to see?

If the temp is too high, what then? Do you have a trans cooler to deal with any additional towing heat? If so heat shouldn't get too high. Positioned/Plumbed correctly, it saves engine water getting too hot too.

I had a bluetooth OBDII scanner and an iPhone app for a couple of years, but have recently switched to the good old ScanGuage. Too must faffing around with the phone app and less convenient to use (you need to open the app on on your phone).

Simple is best :).

Hi Guys,
Hoping one of you experienced Scangauge users can help me out. I have entered the Scangauge 2 X-Gauge codes for reading Auto Trans temperature on my NW Pajero but am suspicious of the readings. First thing in the morning before starting the coolant is 20 deg but the Auto Trans is 30 deg. The codes I entered were from the Scangauge site. Any suggestions gratefully received.

I had this saved in my Outlook Notes -

SG2
http://scangauge.com.au/x-gauge-commands/
ATF Temp -
TXD: 07E2221940
RXF: 046205190640
RXD: 3008
MTH: 00010001FFD8

http://scangauge.com.au/user-manuals/

Hope this helps.

Hi Kazza,
What vehicle was that for?

Ok so I now have the 2 gauges reading within 2 degrees of each other. That's close enough for me.
Final results were:
TXD: 07E12102
RXF: 032100000000
RXD: 2008
MTH: 00010001FFD0 (The last digit is the only change in the entire sequence)
Name: ATF

And just to be clear these worked on a Scangauge 2 Ver 6.2 for a 2013/2014 NW Pajero 3.2L Diesel.

Oops, good point, it is for my D-Max MY14.

If I remember correctly from reading various posts the offsets are 10 C different for the earlier Jatco transmission with the NT onwards having the Aisin, possibly the issue in the first coding.

Yes that's probably it Warren. I have the Aisin transmission.
This has been a lot of fun.
Thank you all for your input :)
Mike

Try this Pajero forum thread .

From the long thread above by glenn_cot
For Torque pro to get Auto temp to work, you need to setup a custom OBD2 PID in the main menu setup you can load already setup custom OBD2 PID and then edit it to read below.

OBD2 mode and PID(in HEX
2102
Short name (used in Display)
Trans Temp (or whatever you want to call it)
Minimum Value (typically 0)
0.0
Maximum Value
200.0
Scale Factor
x1
Unit factor
C
Equation (eg A+B+20- or [0d]+10=A or even just [0d]
f-50
OBD Header to use (leave blank, 'Auto' or HEX header)
TCM

This works on series 4.2 auto and a must if towing

Hello Warren H
I have read the 20 pages on the Pajero forum. Thanks for the link. I love that forum. It looks like Torque Pro is the favourite software. Now all I have to do is be sure the OBD2 dongle accesses the info I want. And as I said in the beginning there are lots of them to choose from. I was hoping to get more info from people telling me which dongle they use and why they like it. I will be keeping my Scangauge so I can double check any suspicious readings.

AFAIK the Jaycar dongle has no issues accessing all available vehicle sensors. There is another mentioned that costs ~$100, this dongle shuts down completely to avoid a parasitic drain (~3mA I recall). I have read reports of eBay cheapies for <$20 that have issues acessing info.
Somewhere on the forum there is a spreadsheet (in Russian) that lists every sensor and the accompanying code to create a custom read out. Wrt ATF temps, there are two sensors apparently one is pan temp and the other the inlet temp. The one above is the inlet temp I think. There ia also a Mitsibushi plugin for Torque Pro you can buy. One way to check that you have the correct offset (the f-50 line) is to compare the atf and coolant temps first thing in the morning they should be identical within a degree or so. One thing that you can't get is the oil pressure as the motor doesn't have an oil pressure sensor. You can also clear fault codes and if you are online get an interpretation. I don't have a dpf on my late model NT so don't know whether you can do regens and otherwise muck about with the dpf.
One thing that seems clear is that you must set the comms parameters and not leave it on auto. I didn't bother and lo and behold about a year later the vehicle went into limp mode, the error code was an ECU comms failure. Once the code was cleared and the comms parameters set I have had no more issues.

Thanks again Warren H,
Have taken all that on board and will post results when available

I have finished installing the OBD2 Australia dongle $40 and downloaded the Torque Pro software $4.95 into my TeyesCC3 Head Unit. Easy to use and the choice of gauges is incredible. Had to set up my own PID file to make the Auto Trans temp work but that wasn't hard and have verified the readings with my Scangauge 2.

In previous posts the equation used is f-50. It works but being pedantic I put in the full Farenheit to Celcius conversion equation. (f-32)*0.5556.
(EDIT: 9/08/21) I have found that the formula (f-32)*0.5556 reads consistently low and have gone back to using f-50
My vehicle is a 2013/2014 NW Pajeo Exceed 3.2L Diesel.

Ultraguages also need a custom setup to get atf temp on a Pajero,see here.

Setting up is easy . I,ve had one for 5years in my Paj and I use the speed display (apart from 5 other displays) to drive by as its 100% accurate...unlike the speedo!!