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Add cruise control to Gen III?

Discussion in 'Gen 3 Prius Technical Discussion' started by lieutenantglorp, Nov 23, 2010.

  1. lieutenantglorp

    lieutenantglorp Junior Member

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    Edit: See post 23 for great DIY instructions!!!!! Thanks to user ircama!!!!

    I found a thread on the gen II, but none on the gen III. Really lame that not even basic CC included in base model, but it's my wife's company car and she didn't get to have any input in buying decision. I looked under blank off panel on right side of steering wheel where switch would be and there is no connector, so can I assume wiring is not included in this wiring harness? On a previous CC mod I did on a VW, I only had to add switch arm, wire to ecu (also, no existing wiring), and have it activated and it worked great. Anyone here attempt this mod or have the wiring diagram? Forget about it?
     
  2. bisco

    bisco cookie crumbler

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    is it a model II or III? i did not realize any level came without cc. that's disturbing, i wouldn't have known if i had purchased one. bummer.:(
     
  3. JimboPalmer

    JimboPalmer Tsar of all the Rushers

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    I think all Prius offered to the general public in the US do include CC. It is possible she has some fleet version not offered generally. That will reduce the number of folks who have needed to make a similar mod. Perhaps Prius owners in other countries may have experience.
     
  4. xs650

    xs650 Senior Member

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    Gen III model II comes standard with cruise control. The control is on a short lever to the right side of the steering wheel below the right hand stalk that controls the windshield wipers.

    If it's a fleet special Model I, then all bets are off.

    Edit: Per this
    http://www.allaboutprius.com/blog/1...i-equipment-level-not-available-any-time-soon
    Model I level cars won't have cruise control.
     
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  5. bisco

    bisco cookie crumbler

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    whew!
     
  6. Paul58

    Paul58 Mileage Miser

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    I read somewhere that the Gen 3 Prius I is actually sold as a Fleet Vehicle and that model does not have CC or any other luxury type options. Just your basic Hybrid in the truest sense of the word. This is probably the model OP's wife has...
     
  7. xs650

    xs650 Senior Member

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    It sounds like you have a Model I which isn't sold the the general public. I haven't noticed anyone else on the forum with a Model I Gen III yet. The loest level Prius the public can but in the US is a Model II which has cruise control standard.

    This page shows the switch and a short harness. If you are lucky you are just missing the switch and harness.
    http://www.toyotapartszone.com/Page...e=False&componentsID=84-08&componentsIndex=13
     
  8. lieutenantglorp

    lieutenantglorp Junior Member

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    It must be a model I Gen III then. Thanks for the input everyone. I don't want to be the guinea pig here but looks like I have no choice since there are so few of these models out there.
     
  9. ETC(SS)

    ETC(SS) The OTHER One Percenter.....

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    +1 on the level I not having cruise control. Somehow, MY beloved company (AT&T) got away with buying level II models for their fleet "we really care" vehicles, which is interesting, since AT&T is tighter than bark on a tree with nearly everything else! I must have been accidently been given an assistant VP's ride... :D
    Anyway...the way I see it is that you have 2 rather unattractive options. You could see if (and for how much) Toyota Iron Works can bolt a CC into the gollywog electronics in this car...
    Or...you can visit "Joey Bagadoughnuts" down at the import electronics emporium, and see if he can figure out how to install a $200 "generic" unit onto this car (THAT's gotta be fun!)
    I'm an Electronics type by trade with a strong minor in engineering, and I know I'd probably not want to have to figure it out.

    Look at the bright side...the hypermilers out there will LOVE you for not sullying up the planet by wasting hydrocarbons on something as silly as cruise control!!!:cool:
     
  10. xs650

    xs650 Senior Member

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    ETC(SS), with the drive by wire throttle, speed sensors and computer power of the car, there should be no extra hardware required for cruise control other than a small wiring harness and switch. It would actually be marginally cheaper for Toyota to leave the car ready for cruise control than to completely disable it in the cars computers.
     
  11. xs650

    xs650 Senior Member

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    Model 1s are so rare that any info you find on differences with other models will generate a lot of interest here.:rockon:
     
  12. rrolff

    rrolff Prius Surgeon

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    You should be able to get this a bit more firm by going to teh dealer parts department...
     
  13. ETC(SS)

    ETC(SS) The OTHER One Percenter.....

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    Concur...that's why I listed that as Option # first. Using an OEM bolt-on is always preferable to grafting a generic unit into a car---especially these days.
    I'm just not sure that a dealer would pass on this "cost saving" to the consumer.
    I'm only a little jaded...and there are some really good dealerships out there.
    Unfortunately....like us Prius drivers, there are always 'ambassadors' out there who are working tirelessly to perpetuate some reeeallly unfortunate stereotypes.

    My Bet: (FWIW) A dealer won't touch this for less than 500 bucks...if they bother at all.
    Hope I'm wrong.

    OP: Let us know what you find out, since there are going to be more and more level I's out there. Companies that buy fleet vehicles are buying more hybrids---for varying reasons, and people who are lucky enough to get to drive them will need information on what's available.
    Good Luck to you!
     
  14. lieutenantglorp

    lieutenantglorp Junior Member

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    Thanks and I will definitely be doing this myself if remotely practical. When I did it on my old VW with drive by wire throttle the local stealership was only helpful in enabling the feature in the ecu.
     
  15. Rokeby

    Rokeby Member

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    lieutenantglorp,

    I would think that it would be helpful to speak to folks who regularly work
    with the internal intricacies of the Prius and its various nested/interlocked
    systems -- which wouldn't be me by a very long shot. :p

    Two places come to mind that have excellent reputations here:

    Luscious Garage, an independent Prius repair shop in SFran :rockon:

    AutoBeYours, a Prius-speific salvage yard and rebuilder in Indiana. :cheer2:
     
  16. cwerdna

    cwerdna Senior Member

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  17. lieutenantglorp

    lieutenantglorp Junior Member

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    So from the look of things, this mod will not be plug n play. I don't see any connector for it behind the cover on the right side of steering wheel or coming off the steering column wiring harness. Does anyone have a system schematic for model 2 cruise control? The last cruise mod I did only needed 4 wires to be run from the fuel computer to the switch. I assume one each for set/decel, acel/resume, power and ground. I would be interested in seeing what a model 2 looks like, but here are some pictures of the area in the model 1 with panels removed:
     

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  18. xs650

    xs650 Senior Member

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    I think You should be looking for a 3 pin connector.

    In my service manual, it only shows a 3 wire connection to the switch with 2 wires doing the controlling. The different functions on the switch change the resistance across pins 1 and 3 to tell the controller what to do.

    Pin 2 is only used on the dynamic radar cruise control..

    Looking at the sketchy illustrations, it looks like the connector plugs in someplace behind the center pad on the steering wheel.

    I think one of the eBay shop manuals on a CD would be a help for you . I got one for $39.99. The useful pages are about 1631 through 1638 on my CD. I got mine from
    2010/2011 Toyota Prius Hybrid Workshop Service Manual - eBay (item 310278005446 end time Dec-12-10 10:50:24 PST)
    and received it in 3 days.
     
  19. lieutenantglorp

    lieutenantglorp Junior Member

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    Thanks xs650. While it would be great to have the service manual, I cannot justify buying it for a car I don't even own (wife's company car) just to get 1 schematic as all the maintenance for the car is contracted out. Too bad the manuals are not like some other cars where u can download just one section you need or small fee for 24 hr access. Would be great if you could PM me the schematic(or pertinent details) or share it here for other model 1 DIYers.
     
  20. wagdaddy

    wagdaddy Plugin Ready!!!

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    Actually, you can! It's called "Toyota Information System". Google it. You can get 2 days for $15. Just find the section you need and print it to PDF. At least that's what I did when I did my auto headlights.:mod: