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Torque » Torque OBD ECU Scanner » Torque Discussion / Ideas » 2007-2011 Jeep Wrangler Trans Temp

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Author Topic: 2007-2011 Jeep Wrangler Trans Temp
sburggsx
Member
Posts: 3
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: May 1, 2012 (GMT)

This is a feature that most Jeep owners would like to have. It is also about 50% of the reason I bought the app. The data is available because there are some apps and devices that can show it.

If there’s something I can do to assist I would be glad to help. I will be trying the above info later today when I have access to my jeep.

piemmm
Administrator
Posts: 6082
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: May 1, 2012 (GMT)

Hi!

I’m in the middle of a big update to the app at the moment – so I will try and see if I can add one of the required ‘bits’ to the extended PIDs to help make this happen for some jeeps that require it

But the rest is mainly looking for the mode 21 and mode 22 PIDs for the sensors in the Jeep that you want to monitor – if you know them, then you can add them right now to the app using the ‘Manage extra sensors/pids’ part of the app (though getting hold of that information is somewhat of a pain).

It should look something (very roughly) like:

PID: 2130
Equation: Q-40
Units: C

I do have some notes, and may include them in a ‘beta’ set of predefined PIDs in the next update (1.5.60) so watch this space and feedback would be very much appreciated (as I don’t have a jeep here myself)

sburggsx
Member
Posts: 3
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: May 1, 2012 (GMT)

Thank you for the update!

omni
Member
Posts: 3
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: October 11, 2012 (GMT)

I found this info on another forum, will this help?

Wake Up ECU
TXD: 07E01092
RXF: 045025920000
RXD: 3808
MTH: 000100010000
NAM: ECU

Transmission Fluid Temperature (Degrees F)
TXD: 07E022B010
RXF: 046205B00610
RXD: 3010
MTH: 000100400000
NAM: TFT

piemmm
Administrator
Posts: 6082
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: October 12, 2012 (GMT)

from that, the PID would be:

22B010
ECU: 7E0 (try this or ‘Auto’ and blank)
Equation: not sure – likely: ((A*256)+B) * 0.25

The wake up ECU – may be needed, though not entirely sure about the PID of ‘1092’ (mode 10, pid 92). My notes say that’s a diagnostic ‘enable’ message so don’t be driving the vehicle when you send this request. I would see what the 22B010 PID gives in response data before trying the ‘1092’ mode/pid.

The ECU in a Merc I have access to is basically a chrysler ecu, so the PIDs may be similar. I’ve not tried 22B010 yet so will have a play myself with this and see if I get a response.

I’ve now got suspect PIDs (for various chrysler vehicles of:

2103
2130
22B010

Still need scaling and units for the equations though (if the above are indeed trans fluid temperatures).

An relatively easy way to try to work these out are (I’m using this method to work out TFT on a Dodge):

1) get the PID data from cold (leave the vehicle overnight) and measure the outside temp
2) drive around a bit, get it warm and take another reading.
3) spend time with a calculator trying to work it out from the (hopeful) differences between the PIDs

other methods could involve comparing readings against other scantools and working out if anything matches from that.

wego4x4
Member
Posts: 12
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: October 16, 2012 (GMT)

I tried these pids with the equation listed and no results. The 22B010 pid didn’t give any info and the other two had 0 as the result. I’m pretty sure I entered everything correctly.

OBD2 Mode and PID = 2103/2130/22B010
Equation = ((a*256)+v)*0.25
OBD Header = Blank/Auto/7e0

Anything else I can do to help?

piemmm
Administrator
Posts: 6082
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: October 17, 2012 (GMT)

You may need to create a PID of ‘1092’ (mode 10, pid 92) as well (and have that display visible. Just have ‘a’ as the equation for that display and anything else should be fine)

With that display visible on the screen as well as the trans temp, then things may start to show stuff for the 220b10 pid or others. I would test myself but I don’t have access to the vehicles (apart from the merc)

The 1092 is an ‘enable’ , similar to 3E / 3F for other vehicles. Make sure your vehicle is parked and ‘safe’ before trying this though!

wego4x4
Member
Posts: 12
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: October 18, 2012 (GMT)

I tried the 220b10 pid with 1092 running in the background, but my ABS light flashes on the dash.

piemmm
Administrator
Posts: 6082
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: October 18, 2012 (GMT)

hm, ok, it may not be that one for your type of vehicle. ‘3E01’ may be another such keepalive instead of 1092, possibly with the header for that set to ‘7DF’

PID: 3E01
Header: 7DF

PwnedXJ
Member
Posts: 192
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: October 18, 2012 (GMT)

Can I try this with an older Jeep Cherokee. What exactly do I need to enter in the editable fields of the Manage Custom PIDs?

wego4x4
Member
Posts: 12
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: October 19, 2012 (GMT)

I tried the 3e01 PID with A in the equation. No check engine light this time. Still no reading on the PIDs. I’m going to give it another try tomorrow. Thanks for the help with this. Hopefully we are getting closer.

wego4x4
Member
Posts: 12
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: October 23, 2012 (GMT)

I tried all the pids again and still no reading. Only reading I get is either 0 or 40 but no fluctuation.

piemmm
Administrator
Posts: 6082
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: October 23, 2012 (GMT)

You’ll need to experiment with the equation (in particular the variables based on the response) – unfortunately I don’t have a jeep to be able to play with

If you are getting a response for the PIDs, then that is good – get the response that is working for the PIDs from cold(in the morning for example), and also from Hot and you should then be able to work out the temperature if it’s there

wego4x4
Member
Posts: 12
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: October 25, 2012 (GMT)

I’ve tried changing the equation and it still stays at 40. I can’t remember the pid that did that. Very strange.

wego4x4
Member
Posts: 12
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: October 27, 2012 (GMT)

Ok. I think I have really good news. I have a decent reading. The 1092 pid worked, but kept setting off my ABS and other lights the longer it was active. The 3E01 Pid wakes up the ECU and doesn’t trigger any lights. I used the initial 22b010 PID and get a good reading with the equation of just A. I’m going to run a few tests in the next couple days and post my findings. Not sure what was going on with my last tests, but everything seems to work ok now.

wego4x4
Member
Posts: 12
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: October 27, 2012 (GMT)

I drove the jeep today and it looks like the temp is correct. I’m going to compare the temps with someone that has a different reader and see how they compare. The 22b010 pid looks like the correct one.

PwnedXJ
Member
Posts: 192
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: October 31, 2012 (GMT)

I am looking forward to testing this. Could you please let me know the specific settings i need to insert to add this pid. Thx in advance.

wego4x4
Member
Posts: 12
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: October 31, 2012 (GMT)

It works. I haven’t had a chance to compare to other apps/gauges but I’m pretty sure its accurate.

The first PID is the wake up PID. This one must be activated at least once before your tranny temp works. To activate it you just need to run it on one screen. I put it behind my tranny temp gauge on the main screen.

PID = 3e01
Equation = A – not sure if this is needed
OBD Header = 7DF -not sure if needed either.

The second PID pulls the tranny info

PID= 22b010
Unit type = F
Equation = A

That’s it. You should be seeing your tranny temp now.

piemmm
Administrator
Posts: 6082
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: October 31, 2012 (GMT)

Hi

That’s excellent news – looks like the wakeup is the key.

It would be very interesting to see if the transmission temperature matches the outside temperature after you have left the vehicle overnight (that way we can be more sure there’s not a conversion required for this) – if you could confirm this then it would be very helpful (as unfortunatley I don’t have a jeep to play with at the moment!)

wego4x4
Member
Posts: 12
Post Re: 2007-2011 Jeep Wrangler Trans Temp
on: October 31, 2012 (GMT)

It does match. I’ve been checking it daily. The tranny temp fluctuations match my driving and the other temps I monitor. From what I see it’s good to go. Thanks you for your help with this. Let me know if you need anything else tested.

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