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VSC, (!)Y, ! Lights but battery

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Hillvz, May 10, 2020.

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  1. Hillvz

    Hillvz New Member

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    Vehicle:
    2007 Prius
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    Prius 2007 1.5L 4 door hatchback
    165K miles on her. Ran great up till now but suspect bc of Corona stay at home not driving it enough led to possible failure?

    During a grocery run loaded it down too much with heavy dog food bags (55lb) and 8 gal of milk? When the lights initially came on. Drove it home and parked it.
    Has dent in hatchback door near bumper where someone backed into a parked trailer.
    Found tire area full of water? It’s been raining like crazy cleaned it all out with shop vac and looking for possible leaks to caulk with 100% silicone. Thinking near the damaged part of hatchback? Thinking about taking off plastic to beat back out with rubber hammer? So it will spread instead of gathering causing the gap? Now it’s parked in garage.

    Temps here only 60-70 for now.

    Symptoms:
    -P0A80 only code (not with Toyota capable mini reader with tech start But just bought scanner tonight and on the way in mail.)
    -slow take offs not as much (torque?)
    -
    -(!) yellow
    -VSC
    -!
    -“problem” flashes with beep sound.
    -sluggish/slow take off
    -coasts but still charges HV battery up to green levels
    -HV battery holds charge long time.
    (I wonder though if this is being allowed to be converted to drive-able energy or just stored?)
    -cleaned HV fan, and electric connectors all good, checked it’s relay with OHm=good!
    -water stirs in inverter in Accessory (power button hit x2 with no break applied) and
    Inverter hums when I put my ear to it.
    -had autozone check 12volt good at 81%
    (When applying the negative back to the body with screw noticed some lil sparks? Does this mean that there is a short somewhere as it’s obviously getting an arch?)
    -car still starts and is “reading” 45 mpg
    -car is driveable if you ignore dashboard.
    -at one point fan kicked in as soon as it started up or was in ready mode. But since it’s cooler out and since cleaning I haven’t heard it engage. But haven’t drove it far enough or during a hotter time to observe if it does this again.

    Let me know your thoughts?

    Will the mini tech stream scanner/reader tell me if the P0A80 is present b/c HV is diminishing? Or could this code be thrown for other reasons? Like ECU battery module on HV ? Bad Relay in fuse box under hood or under dash?
    Can the program tell me which cells are toasted?
    Can it tell me if there are any major “brain” components fried? Like inverter/converter or inverter pump?
     

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    #1 Hillvz, May 10, 2020
  2. bisco

    bisco cookie crumbler

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    start with a check of the 12v health. once that is established, tech stream and the service manual will tell you everything you need to know.
     
    #2 bisco, May 10, 2020
  3. Hillvz

    Hillvz New Member

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    Even if Inhad autozone test it? They said it was good, or do I need to volt test it w it hit the DOHM reader
     
    #3 Hillvz, May 13, 2020
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  4. Hillvz

    Hillvz New Member

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    Okay so update. I’ve got different codes now, a c1310 and c1259. Any ideas?
     
    #4 Hillvz, May 16, 2020
  5. ChapmanF

    ChapmanF Senior Member

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    Those codes just mean the brake ECU noted that the HV ECU was reporting some issues. They are not issues in their own right.

    Either the HV ECU is no longer reporting the issue from before, or you are using a code reader that can see brake codes but not HV ECU codes. (A lot of readers are like that.)
     
    #5 ChapmanF, May 16, 2020
  6. Hillvz

    Hillvz New Member

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    So I got the mini in the mail tried for Four hours to install it, then it couldn’t connect! I’m pissed and ready to give up! Grrrr! I think I’m ready to call it quits!

    So where is the hv ecu located?

    The car sounds like it’s in overdrive or a lower gear?
     
    #6 Hillvz, May 16, 2020
    Last edited by a moderator: May 16, 2020
  7. bisco

    bisco cookie crumbler

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    why did the codes change?
     
    #7 bisco, May 16, 2020
  8. Hillvz

    Hillvz New Member

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    I charged battery and had 12v checked at autozone. All came out good. I might have mistakenly thought it was a P0A80 code from reading all these blogs while I waited for this stupid toyota Tech stream mini thing to come into mail. Ha ha so I put myself through more grief checking the 12 volt battery. They don’t call it troubleshooting for nothing right? I’m still flying blind. Can’t seem to get the driver for the technology to run properly to read the code. I might try a local auto shop to see if he has capabilities I noticed he had been working on a a Toyota Highlander the other day. So If worse comes to worse I’ll send this reader thing back and just go there.
     
    #8 Hillvz, May 16, 2020
  9. Hillvz

    Hillvz New Member

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    Being a full time mom is hard while trying to also play mechanic!
     
    #9 Hillvz, May 16, 2020
  10. Hillvz

    Hillvz New Member

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    Okay so hubby got programmup. He said that instead of searching for the proper driver the computer cd had one to paste into the file. So he has connected it to the car and now I get to go do the rest. After making dinner and feeding infant.
     
    #10 Hillvz, May 16, 2020
  11. ChapmanF

    ChapmanF Senior Member

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    Post 1 included a traction-battery code. Post 4 included codes the brake ECU would have set if there was a traction-battery code. (It would set those for any HV problem; you can't go from C1259 and C1310 to "there's a P0A80". But if there was one, that's why they're set.) I'm not certain from what I've read whether that was on the same code reader.

    A reader that knew about brakes but didn't know about hybrids might see a C1259 and C1310 while not seeing a P0A80.

    Alternatively, if the battery ECU retracts its P0A80, I'm not sure whether the brake ECU immediately retracts the C1259 / C1310.
     
    #11 ChapmanF, May 16, 2020
  12. Hillvz

    Hillvz New Member

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    Okay so using the mini Toyota techstream and going through each of the “systems” I’ve got the following codes:
    -C1259 Hybrid Malfunction
    -C1310 High Voltage System Malfunction
    -P0A80 replace Hybrid Battery
    -P3014 block four weak

    one was from history but not current
    B1271 Com Meter ECU Communication Stop it specifies it’s only history but not current.
     
    #12 Hillvz, May 16, 2020
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