Economical Scanner to Read Tranny Temp

By economical I mean low cost. Want to change my own tranny fluid and probably won't have a second hand to monitor the instrument panel using the jumped ODB2 connector hack.

I don't expect to need to use the tool for deep diagnostics since I don't really do that.

 

What is your price range? I have an Ancel TD700 that came with Toyota software. It did give me the 2 trans temp readings when I changed my fluid.

$140 ANCEL TD700 OBD2 Scanner Fits for Toyota Lexus Scion Engine Car Diagnostic Scan Tool All System Code Reader for Reading/Erasing Code,1996-2021

https://www.amazon.com/ANCEL-TD700-Transmission-Temperature-Diagnostic/dp/B0BLYXVR4K

 

If you've already got one just point an IR thermometer at the pan for a reasonable approximation. If not they're pretty cheap

 

That is at the very upper end of what I consider economical but may be a good candidate. Thanks

 

Thanks but advice from the people I consider reliable say don't do it.
Have you done it that way?

 

FREE, included with truck.

You have a 2022 truck; you can't use a jumper to put the truck into trans fluid check mode. There are no contact pins on the OBD in those positions. Follow the gear shift procedure only.

No need to spend any money - just learn how to do it. A cool day is best and will give adequate time from the "D" lighting steady and when it begins to flash when over temp.

I must say this procedure needs to be practiced and followed with the proper timing to be successful.

 

Nope I've got a scangauge with trans temps

 

unless you pin the thermostat you're at 190 or more. after pinning mine i sit at 120-140 on the highway and 160 stopped

 

So no jumper is required, interesting. I will practice and see how it goes.
One of my concerns is the time it takes from ready temp to get out of the cab, under the truck to loosen the plug. Not as fast as I once was.
Any idea of the time I have?
Another question is the temp guideline the normal operating temp or something less?

You have been very helpful, thanks

 

The factory transmission fluid check mode does two things: It controls the idle speed to the specified value and starts the steady "D" at the low temperature and starts flashing the "D" the high end of the check fluid level temperature range.

I do not currently have the low temperature and high temperature values for you, but they are low at around 100 degrees, not at operating temperatures, plus and minus some single digits. The idle speed I do not believe I have ever seen mentioned as to what that is.

As for the amount of time you have to get out of the cab and under the vehicle, IIRC it is like minutes. But you will be able to time it yourself when you practice the procedure for several mornings in a row. The colder the ambient temperature the longer the time allowable to check the fluid level. Cold weather is not at a premium this time of year. If your ambient temperature is around 100 degrees you may not be able to perform the fluid level check this time of year - nobody can even the dealers IIUC.

Please read the instructions for checking the fluid level and understand them. I do not presently know where they are on this site, but they have been posted many times. Your first post sounded like you were already familiar with the procedure.