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Did he Damage HB Battery, Codes, $1,100 New Brake Acc. installed

Discussion in 'Gen 2 Prius Technical Discussion' started by ebikeman, Dec 26, 2023.

  1. ebikeman

    ebikeman Junior Member

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    I have a few questions about a day I had.

    My job is to drive over across the state. I had van trouble and called up and a guy came and rescued us. Back at his shop, he specializes in Prius's. Had 5 bays full, about an acer or two of them. Engines all over the place. That's how I came to buy one.

    I put front brake pads on, the next day I get lights that suggested my brake actuator was bad (Brake, ABS, ASC, (!) ). With quotes like $2,700 I was sunk.

    I remembered the Prius guy and took a day trip over.

    He hooked up a scan took to check codes. I will tell the rest of the story and ask questions at the end.

    He found codes C1256 - Accumulator pressure low, and C1391-Leakage of adaptive cruse control (ACC) abnormal.

    I asked him how much he'd charge to install a new actuator. He told me you have to bleed the brakes with a computer and do some kind of reset. He has seen the codes go away with a brake bleed.

    For a new from Toyota, a new Actuator installed, bleed, complete for $1,400, tax included. This is how he broke it down.

    He would get a new actuator "without a computer" and put my computer on it.

    He said if I want, he can do a brake bleed and reset to see if that fixes it. $300 for that, if it doesn't fix it, hell take $150 off that and apply it to the Actuator job, $1,250. He gives a 3% discount for cash, $1,212.

    We talked, he answered calls for about a 1/2 hour to 45 minutes (forgot about the running car)

    I went to get into my car and it was still running, I unhooked the computer and gave it back. I noticed my HB Battery was low, about two Purple bars. Never has it gone that low.

    I left to go over the mountain pass. It was still low at the top of the mountain, but after I got home it seemed to go back to normal.

    Here are my questions.

    #1. With my battery so low from idling it so long, did it do any damage? I've never gotten the purple low bars before.

    He made it clear that it was not a for sure thing, but he has seen codes go away after a computer bleed and reset (wish I knew what a brake reset was) if you do brakes w/o it.

    #2. It's true, you need to computer bleed and reset after installing pads. but question is, would it be these two codes?

    #3. Anyone familiar with getting a new Actuator but keeping computer from your car? (could be called something else).

    You have to admit, if I skipped trying the bleed first, used cash to do the new actuator, complete job for $1,358, tax included is pretty good price.

    Any knowledge or advice on these questions?

    Thank you,
    ebm
     
  2. Tombukt2

    Tombukt2 Senior Member

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    There's some chain jerking going on here somewhere as far as I know on a generation 2 actuator accumulator the part that everybody replaces not the stroke simulator You're not going to reasonably I don't believe separate the electronic business behind the plastic and just remove it and stick it in another assembly I don't believe it's like that they used to do this with some of the Volkswagen ABS parts and air flow meter parts but I don't think there's anything like that going on with the Prius at least I haven't heard about it or seen it or seen it offered so I think somebody's pulling the wool over somebody's eyes or something because that doesn't sound right You can't buy the actuator separate from its electronic circuit that's built in it now if he's talking about the computer that's in the dash usually that doesn't get changed with the actuator usually that computer is working fine and trying to make the actuator work and the actuator is acting up because the accumulator can't hold pressure and the pumps running a lot I don't think the computer could fix that leaking accumulator or leaking valve in the circuit with the accumulator but however that works out buying an accumulator actuator for $1,200 or something like that that's a pretty good price The last one I saw bought online picked up at the dealer I don't know 4 months ago was about 1470 and we're in the southeast United States not the Northeast we have some better pricing structure down here generally and if I'm not buying the parts I'd want to see receipts and bills of lading where the stuff came from something this guy doesn't sound well I don't know I don't care if he has 5 acres full of Prius why are they all there anyway something doesn't sound right.
     
  3. dolj

    dolj Senior Member

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    ACC in this code is short for accumulator, not adaptive cruise control. Big clue is the Gen 2 does not have adaptive cruise control.
    No, that is ops normal. The older the HV battery gets, the quicker you can get to 2-3 bars.
    Well, yes the first part is true and you might reset (clear) codes but you generally do not need to bleed brakes when all you do is change the brake pads. Additionally, changing the pads (especially with the 12 V battery disconnected) would not generate those codes. You did, of course, pump the brakes several times after completing the reassembly of the brakes and before reconnecting the 12 V battery, didn't you?
    Could it be called a resistor? New brake accumulators come with a matching resistor. I've never heard of the brake ECU (computer) needing to be changed alongside the brake accumulator.

    Did you try clearing the codes after completing the brake job?
     
  4. ebikeman

    ebikeman Junior Member

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    The Maniac said if you replace just the pads on a car, you don't have to do the bleed but this is not a regular car, it's a Prius you do. He also said you have to reset something on a Prius, which I didn't do, whatever that is.

    We talked about so many things and with so many other distractions, not sure what it was computer. It was some way he could make it cheaper. (remember, the company I used to work for, we did deals on repairs. He doesn't know I don't work there anymore so could just be a "deal" for me).

    Each steep here is important. Please follow along and give me your best thought.

    Bought the car two weeks before. The guy told me everything was good except it will need front brakes. I went over to a friends house to show it to him. I told him it will need new pads. He said lets look. Slid a jack under, put it on stands, got his air gun in 5 seconds he had the wheel off. Took a socket took a bolt off, and had the brake pad in hand in less then 5 minutes.

    We saw they where as close to metal to metal as you can get. About a paper thin. Didn't have pads so he put it back together. Went home and the next day I got those lights.

    Cleared the codes with the clip and peddle stroke way. Went for a drive all day. On my way home, as I was about a block away, they came back on. I was hoping it was because they where all the way out and the new pads put the calipers all the way in.

    I figured since we had the battery unhooked for so long (had friends stop by during change), the codes would be cleared. Only as Im typing this did I realize we didn't "clear" the codes again, just that I was told disconnecting the 12v would "clear" the codes.

    I do know I do not have ABS currently (car can skid). Not sure if if did need bleed and a reset, if it would just have a code but work, or it would make it so it didn't work properly.

    I do notice my car goes straight, but sometimes it pulls a little to the left. If I tap the brakes, it goes straight. Can a faulty brake actuator grab a little on one wheel?

    Whatever the problem is, my actuator is not working properly (can skid).

    P.S. I have a picture of the screen of his computer. It does say, "Leakage of the adaptive cruse control (abnormal)" and then the rest is outside the picture.

    When my friend took the pads off the first time, not sure if we unhooked the 12v. I've read something if you take the pads off, and get close to the car, it can sense your close and put the piston out a little.

    What is a brake reset that I hear so much about?

    Thank you,
    ebm
     
    #4 ebikeman, Dec 28, 2023
    Last edited by a moderator: Dec 29, 2023
  5. dolj

    dolj Senior Member

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    This is just bollicks.

    I don't know if it is a case of you not understanding what was said and misunderstanding, but I can tell you you do not need to bleed the brakes if all you did is change old pads for new ones. You do, however, need to press the brakes until they get firm after reassembling the brakes and before you reconnect the 12 V battery. You then need to use a code reader to clear the codes – just having the 12 V disconnected will not clear these brake (ABS) codes.

    If after that you still have codes, you need to rescan the car to see what codes you have now.
     
    #5 dolj, Dec 28, 2023
    Last edited: Dec 28, 2023
    Brian1954 likes this.
  6. Tombukt2

    Tombukt2 Senior Member

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    The maniac was not correct The adaptive cruise control can't leak It's electric It's not vacuum anymore so there's nothing to leak except some electricity and they don't talk about that like that in codes or anything I believe. So when you had the pads off and they were paper thin obviously nobody did anything silly and you were able to just stick the pads back in stick the caliper back on the car and off you go most people when they're breaking a Prius don't actually engage the pads the electricity does most of the stopping your regenerative braking unless you have to slam the brake pedal pretty much to the floor you're on electric braking Don't worry about understanding it it really doesn't matter That's why the pads last so long on the Prius so now that you have these codes coming up when you go to take your front wheels off again to actually replace the $30 pads that you need to replace Make sure that your remote is away from the car it would be nice to disconnect the 12 volt so that by accident the calipers can't all of a sudden squeeze down while they're off the car popping the Pistons out and causing you problems that you'll never get past so maybe undo the 12 volt before you start this venture again You were lucky once you may not be twice. So with the 12 volt disconnected now you can put in your new pads when you need to squeeze the caliper down use your large channel locks and open the bleed screw on the caliper you're working on squeeze the caliper down with one hand it's all it'll take and then when the fluid stops squirting out of the fitting close the fitting The pads are already in their holder drop the caliper over the pads put the screws in or the bolts and that side is finished Go do the other side but the wheels back on put the 12 volt back live You can step on the brakes with the 12 volt disconnected if you want to or you don't have to You can apply the 12 volt step on the brakes all the way to the floor hold them a second let the pedal up there should be no bleeding and no funny business needed If there is when you let the fluid squeeze out of the fitting you were slow to close the fitting when the fluid stopped and it sucked a tiny bit of air in but that should dissipate about an hour or less If more air than that got in then you may need to bleed. And that's about it All of your lights that you have now are either a wheel sensor got fubar while y'all were playing around looking at the pads or your accumulator actuator is actually going bad which is very common on a generation 2 at this year of age so whether you have miles to back it up doesn't really matter You're at the age where this would happen to a generation too and more than likely you are going to be getting an actuator or going to be getting out of the car The choice is yours there's nothing magical about it.