Monitor trans temp during drain/fill

Planning to do drain/fill on my 21 sr5. Ive never used a scan tool but you need one for this job right? Can someone point me in the right direction as to what i should use?

 

The Veepeak OBD adapter and OBD Fusion app.

 

You can activate the transmission temp check mode through the drive selector sequence. Procedure in the attached .pdf

 

I just have to purchase the techstream cable right?

 

Have you used this method? My 21 didn't have the pins. I have a scan gauge but wanted the reduced idle quicker but since mine doesn't have the listed pins I wasn't able to put the truck in check mode. It will eventually idle down but takes longer.

 

I was able to activate it in my ‘21 SR5

 

No cable required

 

Watch this. Method starts at 7:50 marks.
https://youtu.be/NUAuGmDGntY?si=wbtJuc2TIPSGoxJC

 

Maybe I was looking at my OBDI port wrong. I was reluctant to poke a paperclip in the port unless I was absolutely sure what I was doing. The day before I did my first D&F I did a test to see if the idle settled before the pan temps reached check temps. It all worked out fine.

 

OBD adapter and Fusion app with Toyota enhanced purchase. Worked perfect..

 

This one?

 

Yes

 

Veekeak obd2 is totally worth it. Did drain and fill on 2 trucks and it went awesome. No paper clip method and shifting from N to D and back and forth. Just watch your phone for temp to rise, drain level bolt. Wait, torque back. Ready to go.

 

I used Elm 327 OBD adapter and Fusion app..worked fine. Also have Veepeek OBD adapter just in case.