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See the manual (same for 2013): Theft Deterrent System; Immobilizer System - Toyota Prius V 2012 Quick Reference Manual [Page 149] | ManualsLib
Nothing appears in your post, but look for a voltage sensitive relay (VSR) or module. Should stay open at resting battery voltage, close when...
It’s the immobilizer indicator.
Yup! Been there. Brine solution worked its way into the sensor connector. Disconnected, cleaned, lubed, reconnected, and resolved.
I bought these for my 2012 v Five, then removed them, relying instead on an 'on when +12.8V' relay powering much brighter yellow LEDs with white...
High amperage power supply, switching, relays, stepper motor position monitors and holds… possibly ECM connections. It’s not exactly plug and play...
Yellow plug is the rear/side curtain air bag circuit, white plug is seat occupancy/seat belt latch sensor circuit. You will need to add a motor...
If you didn’t maintain power to certain systems like the radio and auto window closers, you may have to reset them. Otherwise, just drive away.
2012 v Five with 49,000 miles, and a keeper, here, too!
Traction battery end of life based on what? Miles? Time in Service? Cycles? Our 49,000 mile 2012 v Five is showing no MPG or traction battery...
His many miles did you expect to the rear rotor/pad change interval to be? I’m hearing some suggest ‘lifetime’.
Correct. Works great on the loaded v but likely won’t accommodate dynamic trailer hitch loads because they are not detected by the chassis sensor.
There is a static load control bias in the P&B system, with a sensor underneath the right rear chassis, between rear axle beam and chassis, so...
That looks like a long-term leak. Spray it down with brake cleaner, and see where the seepage is occurring.
Proper decals, aggressively applied, will meaningfully improve RWHP (or FWHP, if so inclined).
Point taken though there are experience and typical fault paths to consider, as well.
Check codes and report back. (I could tell you, but it would encourage the trolls.)
In my example, intermittent wheel speed sensor signal was the code, FWIW.
Could be an intermittent/open connection to one or more wheel sensors. Been there.
“NOT THIS LEG, THAT ONE”
