OBD 2 Transmission temp

Submitted: Tuesday, Jun 29, 2021 at 17:37
ThreadID: 142056 Views:957 Replies:4 FollowUps:19
I'm wanting to buy a OBD2 scanner that I can Bluetooth to my Android tablet. I know there are dozens out there but I am specifically after one that can access the Coolant Temp & Transmission Temp and display as dials on my tablet. I have a Scangauge 2 but am looking for something with a more appealing visual. My vehicle is a 2014 NW Pajero Exceed.
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Reply By: Kazza055 - Tuesday, Jun 29, 2021 at 18:18

Tuesday, Jun 29, 2021 at 18:18
If you have the Scangauge 11 stick with it, at least it works.

I initially tried using a Bluetooth dongle and it ended up sending the cars ECU a false signal that gave me a ATF light on the dash. This happened about 6-8 times until I turfed it and fitted the Scangauge 11.

Just be warned that some of them can cause problems, I have not seen the ATF light come on since then.
AnswerID: 636980

Follow Up By: RMD - Tuesday, Jun 29, 2021 at 19:01

Tuesday, Jun 29, 2021 at 19:01
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?
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FollowupID: 914940

Follow Up By: Member - Michael H54 - Wednesday, Jun 30, 2021 at 12:08

Wednesday, Jun 30, 2021 at 12:08
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.
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FollowupID: 914949

Follow Up By: RMD - Wednesday, Jun 30, 2021 at 15:21

Wednesday, Jun 30, 2021 at 15:21
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.
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FollowupID: 914955

Follow Up By: Grinbot - Thursday, Jul 01, 2021 at 13:55

Thursday, Jul 01, 2021 at 13:55
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 :).
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FollowupID: 914971

Follow Up By: Member - Michael H54 - Saturday, Jul 03, 2021 at 12:17

Saturday, Jul 03, 2021 at 12:17
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.
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FollowupID: 915012

Follow Up By: Kazza055 - Saturday, Jul 03, 2021 at 12:48

Saturday, Jul 03, 2021 at 12:48
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.
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FollowupID: 915013

Follow Up By: Member - Michael H54 - Saturday, Jul 03, 2021 at 13:08

Saturday, Jul 03, 2021 at 13:08
Hi Kazza,
What vehicle was that for?
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FollowupID: 915014

Follow Up By: Member - Michael H54 - Saturday, Jul 03, 2021 at 14:50

Saturday, Jul 03, 2021 at 14:50
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.
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FollowupID: 915018

Follow Up By: Kazza055 - Saturday, Jul 03, 2021 at 16:06

Saturday, Jul 03, 2021 at 16:06
Oops, good point, it is for my D-Max MY14.
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FollowupID: 915019

Follow Up By: Member - Warren H - Sunday, Jul 04, 2021 at 11:25

Sunday, Jul 04, 2021 at 11:25
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.
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Follow Up By: Member - Michael H54 - Sunday, Jul 04, 2021 at 15:22

Sunday, Jul 04, 2021 at 15:22
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
1
FollowupID: 915031

Reply By: Member - Warren H - Tuesday, Jun 29, 2021 at 20:11

Tuesday, Jun 29, 2021 at 20:11
There is a lot of useful discussion on the Pajero forum. Buying a decent dongle eg the Jaycar OBDII and setting the correct comms parameters rather than leaving the device on auto avoids the issues mentioned above. The Pajero forum threads also have info on custom PIDs to read transmission temps. Torque Pro seems to be the go to app. I see you have an Android tablet, but for the info of others, note that iPhones will not work with Bluetooth OBDII readers.
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AnswerID: 636984

Follow Up By: Member - Warren H - Tuesday, Jun 29, 2021 at 20:44

Tuesday, Jun 29, 2021 at 20:44
Try this Pajero forum thread .
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Follow Up By: Member - Warren H - Wednesday, Jun 30, 2021 at 10:39

Wednesday, Jun 30, 2021 at 10:39
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
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Follow Up By: Member - Michael H54 - Wednesday, Jun 30, 2021 at 11:59

Wednesday, Jun 30, 2021 at 11:59
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.
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FollowupID: 914947

Follow Up By: Member - Warren H - Wednesday, Jun 30, 2021 at 14:44

Wednesday, Jun 30, 2021 at 14:44
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.
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Follow Up By: Member - Michael H54 - Wednesday, Jun 30, 2021 at 15:16

Wednesday, Jun 30, 2021 at 15:16
Thanks again Warren H,
Have taken all that on board and will post results when available
1
FollowupID: 914954

Follow Up By: Member - Michael H54 - Monday, Jul 26, 2021 at 12:12

Monday, Jul 26, 2021 at 12:12

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.
My vehicle is a 2013/2014 NW Pajeo Exceed 3.2L Diesel.
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FollowupID: 915310

Reply By: Member - Michael H54 - Wednesday, Jun 30, 2021 at 15:29

Wednesday, Jun 30, 2021 at 15:29
A website I found to be informative in my search.
https://www.carscanner.info/choosing-obdii-adapter/
AnswerID: 636995

Reply By: Member - Bigfish - Wednesday, Jun 30, 2021 at 20:04

Wednesday, Jun 30, 2021 at 20:04
Get an Ultragauge. Hell of a lot bigger screen size and shows more info than the scangauge.
AnswerID: 637000

Follow Up By: Member - Warren H - Wednesday, Jun 30, 2021 at 20:09

Wednesday, Jun 30, 2021 at 20:09
Ultraguages also need a custom setup to get atf temp on a Pajero,see here.
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Follow Up By: Member - Bigfish - Wednesday, Jun 30, 2021 at 20:13

Wednesday, Jun 30, 2021 at 20:13
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!!
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FollowupID: 914963

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