Standard Prius Headlights in Advanced PiP???

The only problem I see is if the "regular" headlights - which would draw more from the 12-volt bus than the LEDs (which were only on the low beams anyway) - required a larger fuse to supply them. The wiring is sized to safely carry whatever current the original fuse was rated for. That current doesn't go through a computer, so I don't know what the dealer was worried about.

 

Perhaps @Elektroingenieur could chime in of he gets bored and want to do research.

 

Had a 2010 and a 2015. Headlights were the same. You couldn't see a thing.
The 2017 Prime advanced leds and they are best IMO.

 

Toyota did not make a 2010 PiP.
OP is asking about a potential damage to their 2012 PiP. They are not looking to get a different vehicle.

 

I can’t give an authoritative answer here, but like Toyota, I don’t recommend modifications. The most conservative course would be to restore the original (LED) headlights and repair or replace any altered wire harnesses.

That said, Toyota’s sales brochure (PDF), Electrical Wiring Diagram and Repair Manual (both available by subscription to techinfo.toyota.com), and Electronic Parts Catalog all say the 2012 Prius Plug-In Hybrid could have been built with either halogen or LED low-beam headlights, depending on the trim level.

When deciding whether to do anything now, here are some points to consider:

• Are the headlights wired so the current is switched by the No. 1 Integration Relay, not by the Main Body ECU (electronic control unit)?
  
  This may be the source of the comment about damage to computers: with LED headlights, there is an additional wire to each headlight directly from the Main Body ECU, and if someone incorrectly connected these wires to the lamps of the replacement halogen headlights, there might be more current drawn from the Main Body ECU than it was designed to provide.
  
  To know for sure, you’d have to check the complete circuits against the Electrical Wiring Diagram, but it would be a good sign if each headlight unit assembly were connected only to violet wires (from the Integration Relay, for low beams, and from the H-LP RH HI or H-LP LH HI fuse, for high beams) and to white wires with black stripes (to body ground), but not to a solid black wire (from the RLEW or LLEW terminals on the Main Body ECU, only for LED headlights).

• Are the headlight unit assemblies the same as those installed at the factory in vehicles built with halogen headlights, and do they have the correct lamps (bulbs) installed? There are part numbers and photos of the lamps in Figure 81-01 of the parts catalog.

• Were the correct waterproof (sealed) connectors used to connect the headlight unit assemblies to the wire harness, with the correct terminals, seals, packing, and hole plugs, as required? Are the terminals and connectors locked in place?

• If there are any wire splices, are these of a suitable size and type (crimped parallel or butt splices, not wire nuts or insulation-displacement connectors), and were they waterproofed with self-fusing silicone tape or heat-shrink tubing?

• If wires were left disconnected, have these been properly insulated and waterproofed?

• Are all the wires secured, to minimize the risk of pinching, chafing, or other mechanical damage, but not so tightly as to likely to break or pull apart?

• Are you willing to ignore spurious diagnostic trouble codes B2430 or B2430, LED Headlight LH (or RH) Circuit Malfunction? It’s conceivable that the Main Body ECU stores these codes if it doesn’t detect the LED headlights, but the Repair Manual is vague about the detection conditions, so I’m not sure about this.

 

I didn't say my 2010 or 2015 were PIP's.
Just stating the headlights were inadequate.

 

I’ve found that the TIS sign-up flow sometimes doesn’t work properly unless you’re using Microsoft Internet Explorer on Windows. If you look in the JavaScript Console in Chrome, you’ll probably see an error message like:

Toyota or their supplier, Snap-On, needs to fix this. There is a “Contact Us” link at the bottom of the TIS home page, and on that page, it gives their support phone number and hours:

I can suggest an alternative, however: your local public libraries sponsor free access for their patrons to the ChiltonLibrary service, where you’ll find most of the text and illustrations from the Repair Manual and Electrical Wiring Diagram. They’re not organized as conveniently as on Toyota’s site, and you’ll need to select 2012 Toyota Prius (not Prius Plug-In), since the Plug-In topics are interleaved.

For example, if after selecting 2012 Toyota Prius in ChiltonLibrary, you click on Repair > Wiring Diagrams > SYSTEM CIRCUITS > Headlight, you’ll see there are eight pages of diagrams, repeated twice. The first Page 01 is for the Prius, and the second Page 01 is for the Prius Plug-In; you can confirm which is which by looking at the bottom of each page.

If you’re not familiar with Toyota’s diagrams, you may wish to review the INTRODUCTION, HOW TO USE THIS MANUAL, GLOSSARY OF TERMS AND SYMBOLS, and TROUBLESHOOTING sections, all linked under Wiring Diagrams.

You can also see the Repair Manual explanation of the headlight circuit under Repair > Chassis Electrical > Lighting (EXT) > Headlight Assembly > Lighting System > Low Beam Headlight Circuit (2012 Prius PHV From 01/2012).

The Wire Harness Repair Manual (PDF) may also be useful; it’s a bit dated and may not have all of the connector styles used on your car, but the basic procedures haven’t changed.

 

dseattle,

you might have better luck asking in the Gen 3 Mods and Accessories forum. Lots of members here have done the reverse, replace the halogen units with LED headlight units. From what I recall from casual reading, the difference between the halogen and LED units is the need of an additional LED headlight "black box" (module). My guess is the wire harness is pretty much the same, up to this LED headlight module.

But dont take my word for it, the guys in the Mods and Accessories forum would definitely know.

 

Has it been resolved that the 2012 Plug-In Prius did not come with LED headlights?

http://www.auto-brochures.com/makes/Toyota/Prius/Toyota_US%20PriusPlugIn_2012.pdf

 

The base PiP is regular halogen headlights. But the Advanced is definitely LED headlights, same as the 10-15 Prius 5 was, I believe.

 

Ahh, you're right:

 

Actually, @sfv41901 is probably a good resource since his business deals in Gen 3 modifications.