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Won't Boot - Replaced 12v battery did not fix

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Dan Strnad, Jun 2, 2015.

  1. Dan Strnad

    Dan Strnad New Member

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    Still can't find the PWR Relay
     
  2. Patrick Wong

    Patrick Wong DIY Enthusiast

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    It is supposed to be somewhere on (or near) the relay/fuse box under the instrument panel, driver's side. Could you find the 30A PWR fuse? If so, the relay is supposed to be connected to one side of that fuse.

    If you remove the relay/fuse box again, how about taking some photos and posting?
     
    #42 Patrick Wong, Jul 2, 2015
    Last edited: Jul 2, 2015
  3. Dan Strnad

    Dan Strnad New Member

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    These are the only pictures I took when the Jumper Block was out. You can buy these entire things on ebay for $30. It's tempting to just start swapping parts. There are 5 small relays on the Body ECU board but I don't think that any of those are the PWR relay. DrivJB1.jpg DrivJB2.jpg
     
    Patrick Wong likes this.
  4. rwhyde

    rwhyde Junior Member

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    I just read through these postings multiple times. I did not see verification that the brake light switch was verified. Keep in mind this is a wear part and has a high potential to be involved in this issue. Next I would actually check wiring at the window switch in the drivers door. It is not unusual for high mileage vehicles to experience wiring harness failures. Do the door locks work but just not the windows?
    Many times multiple issues are difficult to diagnose when ne is only expecting one issue. Finally, if the dash cluster has failed once again,it can impart some strange behaviors onto the body systems, depending on that nature of the failure. I would put my old one back in as a test. A used cluster is going to fail at some point so the reliable solution is a new one or a rebuilt to get another 100k plus.
    Keep at it.
     
  5. Xaoh

    Xaoh New Member

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    I am having the same identical problem

    was there a solution to this issue, is there anyone who knows the solution

    I’ve went through everything , in this post but I have the same symptoms
     
  6. Xaoh

    Xaoh New Member

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    Anyone have ideas on this?
     
  7. JC91006

    JC91006 Senior Member

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    You should create a separate post with the problems you’re experiencing. It’s rare that you would get two cars with the exact same symptoms.
     
  8. mr_guy_mann

    mr_guy_mann Senior Member

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    So please explain the symptoms YOU have. Year, mileage? When did what start happening? Previous work that could be related? What scantool do you have and what codes have you retrieved?

    Posted via the PriusChat mobile app.
     
  9. Xaoh

    Xaoh New Member

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    Identical issues
     
  10. Xaoh

    Xaoh New Member

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  11. Xaoh

    Xaoh New Member

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    Seems this problem has popped up before , trying to locate the solution
     
  12. Xaoh

    Xaoh New Member

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    I have codes B2271 and B2274

    identical issues with this , I’ve read it over , using tech stream and snap on scanner . The previous owner drove it until it’s completely stopped, he tried boosting and put charge on it and it died . The car is stuck with key in ignition mode .
    I have changed the push button ; the key slot , at no avail . Every fuse and relay was checked , battery is good, engine light flashes and goes off , amber blinking light on the start button. I can code scan the car . No smart key and no buttons under steering wheel
     
  13. dolj

    dolj Senior Member

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    Your profile states your car is a 2019 Prius Prime. Is this the car you're discussing?
     
  14. Xaoh

    Xaoh New Member

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    2006 Toyota Prius we are discussing
     
  15. mr_guy_mann

    mr_guy_mann Senior Member

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    You need to get a copy of the factory service manual with wiring diagrams.

    B2271 indicates the the power source ecu isn't receiving power from the AM1 or AM2 fuse, or the ecu has an internal fault for one of those circuits.

    B2274 indicates a problem with the circuit that triggers the ACC (accessory) relay coil.

    You should check if power from AM1 or AM2 is actually present at the correct pins of the power ecu connector.

    (If things flicker on then off, could be a weak connection. Or a bad inverter pump pulling down the AM2 circuit but not quite popping the fuse.
    Might want to unplug the pump, replace the AM2 fuse, and recheck.)

    Also unplug the ecu and check if the ACC relay control circuit is intact from the connector through the relay to its ground point (and that the circuit isn't shorted to ground.

    Possible rodent damage?

    Posted via the PriusChat mobile app.