ECU-IG #2 Fuse Blowing

[OBCruiser]

Always a reader and never a poster, until now...

My 2016 LC is intermittently blowing the ECU-IG #2 fuse. When this happens it also:
- Throws code P0705 (Transmission Range Sensor failure)
- Puts the transmission in limp mode
- Fails to display one the dash what gear the vehicle is in
- The pre-collision system shuts down
- Lane departure system shuts down
- Headlight system malfunction (lights still work, but auto-high beams don't

Swap the fuse and it will last a day one time and the next it will blow again before I get out of my neighborhood.

I've done some visual inspections of the wires I can get to, for example the transmission range sensor wiring. Nothing obvious...

Any suggestions, other than taking it to the dealer?

Thanks in advance!

 

[Sandroad]

For something like that, the first things I would check are rodent damage in wiring (either under the hood or under the dash), or water damage to wiring via a corroded connector in the door sills. Something is causing a short in that circuit. Rodents or water intrusion are good places to start. Assuming of course there are no wiring modifications.

 

[GrouchyTech]

It lasts a day because this is a 2-trip detection DTC.

Check for wiring damage. Would be really helpful if you have a techstream and can view the data list.