Maestro Wiring Help

2013 Tacoma question on the Maestro ODB2 connection (Have the T-01). The Stereo shop cannot figure out how to connect, Truck been in all day again,
Any tips or diagrams would help out alot. They said they have installed quite a few of these and were just plug and play. Avic 7200 Nex

 

obd2 plug end goes to obd2 port under drivers dash by kickplate side and the smaller end of that attaches to the to1 wiring harness that is attached to the maestro

 

Thanks, called maestro and they said go behind the port. Need to tap in the wires, so the port is free
I think the shop finally got this late last night but who knows. Will see this am.
If anyone has a pic, would be helpful too

 

I have not tapped wire in as I have no issue unplugging it if needed to get to obd2

 

Thanks to all who responded. Just picked up the Tacoma and all seems to work well, Speedometer, tire pressure, Tach.
Fuel Gauges are highlighted, but does not show any information. Set the Fuel Capacity, will give it a few drives to see if it needs time to calibrate.
Not going back to the installers I used, may need to find another guy here in Denver if things go south.

 

never tried fuel capacity just changed mine to show instant mpg as I can see the needle on the dash lol

 

Got it all working. Needs a bit to calculate
Again thanks to all who repsonded