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04/05 combination meter into 08?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by violinguy, Jul 23, 2023.

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  1. violinguy

    violinguy Junior Member

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    Have a 2005 combination meter that I want to swap into an 08, and have not had success.

    Tried putting it in the 08 dash assembly and the meter worked but controls like the cruise control went bonkers (the CC switch turned on a window defroster)

    Moved wiring harnesses off 05 dashboard assembly using 05 CM and in the configuration, the CM did not turn on.

    What am I missing?
     
    #1 violinguy, Jul 23, 2023
  2. JC91006

    JC91006 Senior Member

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    The cruise control has nothing to do with your combination meter. Using an 05 meter on an 08 would lose probably the low tire/air sensor warning, odometer being maxed out at 299k miles, not much of anything else (can't really remember). But there shouldn't be any problems affecting the steering wheel controls.

    Why can't your 08 combination meter be used? If it's out, it's just a matter of putting on a new capacitor
     
    #2 JC91006, Jul 23, 2023
  3. violinguy

    violinguy Junior Member

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    It's not the capacitor, it's due to the fact that the cruise control does not work and I have checked switch and clockspring and replaced a module ecu near combination meter. All of these parts were working fine and the cruise control is still not functioning.

    I have a code b2282 and according to the write-up on it it is either the wiring harness or the combination meter. So I was just trying to get a combination meter in there to see if the cruise control would start working so that I could rule out anything else.
     
    #3 violinguy, Jul 23, 2023
  4. PriusCamper

    PriusCamper Senior Member

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    Clearly the 2008 meter is not compatible with the 2004 meter.

    What happened to the old combination meter and why can't you repair it or use it? Among other things the 2004 meter only goes up to 300K miles and the features of the car back then that depended and those bundles of components is much different than what was available 4 years later.

    If all else fails https://www.texashybridbatteries.com/prius-combination-meter-repair
     
    #4 PriusCamper, Jul 24, 2023
  5. PriusCamper

    PriusCamper Senior Member

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    Nope, capacitor won't fix this. But he knows this already...
     
    #5 PriusCamper, Jul 24, 2023
  6. Tombukt2

    Tombukt2 Senior Member

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    Yeah I tried this mistakenly years ago The displays will not swap out The displays don't even look the same The transmission icons are on the other side of the other numbers etc anyway it didn't work I tried using the different ribbon cables coming from the two different assemblies they don't necessarily mix and match I think the pinouts are different so if you were willing to sit down with the wiring diagrams for the two and figure out how to straighten out the pin out so I don't know if you can do that so easily with ribbon cable maybe possibly you could make it work but I don't know why you would want to do that The late '06 to 09 are plentiful when I walk up to the madel KQ I can take the whole plastic piece off the top of the dash after undoing the two airbag nuts underneath take the whole heads up display unit with the two ribbon cables that go with it and anything else I want at the time I think I paid $20.25 maybe. And I'm off and running I have no idea if it works or not but I have all the ribbon cables and everything that go with it. So I'm assuming the ribbon cables are what you're talking about your code is about I did not look it up. I have both the '04 '05 and the late 06 to 09 laying here in the shop ribbon cables and all generally are with them but no they don't swap out any kind of easily You could probably make it so but it certainly not worth my time.
     
    #6 Tombukt2, Jul 24, 2023
  7. violinguy

    violinguy Junior Member

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    Yes thank you. I'm coming to that conclusion myself. The meter that's in the car I believe has some kind of internal fault that is making the cruise control not function. That's the reason for this entire operation that I'm trying to do. I am probably going to see if I can swap it out for one with Texas hybrids. Thanks for the info.
     
    #7 violinguy, Jul 24, 2023
  8. Tombukt2

    Tombukt2 Senior Member

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    That's weird because in all the four five meters displays I've had in this 09 I'm driving the cruise is always worked as long as the meter is plugged in the only time it doesn't work is when the display is off when the displays off the cruise doesn't work and the display doesn't show speed transmission position and that sort of thing gas mileage and mileage is not being recorded I don't think when it all comes back on I have like 25 mi on the car that aren't on the display I know they're there because I know when I shut the car off what the miles travel was I always know this because I just do. So the cruise never worked when the display is not on. The minute I put a display in and it lights up the cruise is working so what you're saying is you have a display that lights up show speed transmission position and gas but your cruise isn't working Is this correct?
     
    #8 Tombukt2, Jul 24, 2023
  9. violinguy

    violinguy Junior Member

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    See uploaded pic. This is from techstream live data in the cruise control area. Basically all functions are working with CC system EXCEPT data in 1st 2 values. Vehicle speed starts off ok and then at around 10mph falls off to zero as I speed up to 25mph (lowest CC set speed)

    Other than that everything else works perfectly with the CM
     

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    #9 violinguy, Jul 24, 2023
  10. violinguy

    violinguy Junior Member

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    Oh forgot...the only other strange symptom is the MFD consumption screen doesn't log mpg history over 30 minutes ( in the 5 minute intervals). Only shows instantaneous mpg
     
    #10 violinguy, Jul 24, 2023
  11. violinguy

    violinguy Junior Member

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    Outcome: Matt at Texas hybrids is very helpful. I had experimented with the setup of the 05 combination meter in the 08 dash assembly a few days ago and was freaked out by all the weird lights on the dashboard so I did not test drive the car in that configuration. Well, evidently I was only a 30 second test drive away from proving that the combination meter was the problem all a long to my cruise control not working. I redid the experiment today with that setup while taking the test drive with wonky lights (cruise control light was now the front defrost light) AND...

    The cruise control worked perfectly!!!!! Very elated! Now I'm going to send my newly diagnosed defective 08 cluster to Matt for his Museum and he's going to send me a workable 06 to 09 cluster with the exact same miles.

    This has been a two or three month ordeal since I bought this car and my wife has a bad back and really needs Cruise control. It started with the obvious things to look into like the clock spring in the actual CC switch and then I replaced the power supply control module near the combination meter. The only remaining areas where the harnesses themselves and the combination meter.

    This is clearly a very outlier defect because I have not found anybody online that's had this exact scenario. Because the capacitor issue is incredibly common, it overshadows any other issues with the combination meter which are obviously incredibly rare. So hopefully some unlucky Soul who has this exact same problem will find this to be a shortcut that I didn't have 3 months ago.
     
    #11 violinguy, Jul 24, 2023
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