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New 12vlt Battery and Display is now dead

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by r3meyer, Oct 8, 2012.

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  1. r3meyer

    r3meyer New Member

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    Anyone ever had this problem or know what to check? I put in the key, hit the brake, and push on the power button I only get a beep and the CEL light flashes on and off for just a half a sec and then thats it. nothing. The power light never turns green, only amber.

    Nothing else will turn on, light up or anything.

    Again the ACC battery is brand new and not the problem. Do i need to reset something?
     
    #1 r3meyer, Oct 8, 2012
  2. nh7o

    nh7o Off grid since 1980

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    What kind of new battery? There are reports of "new" batteries being delivered with no charge. First step would be to check the voltage and be sure.
     
    #2 nh7o, Oct 8, 2012
  3. edthefox5

    edthefox5 Senior Member

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    That sounds like a dead or very low new battery which is pretty common. Turn on the headlights and see how bright they are.
    If the lights are bright unplug the 2 connectors that are plugged into the module atop the pos terminal.
    Plug them back in. That will reboot the car.
     
    #3 edthefox5, Oct 8, 2012
  4. r3meyer

    r3meyer New Member

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    Ok, battery is at 13.3vlts. Also tested with a spare yellow top optima i had around and the symptoms are the same.
    I can put the key in, and hit the power button. The power button has a green light but nothing else comes on. No clock, no dash, no screen.

    As soon as i hit the brakes like normal, it makes a quick hum noise, the P button flashes green lights, and the CEL flashes and then then thats it. The power light then just flashes Orange and car is beeping.
     
    #4 r3meyer, Oct 8, 2012
  5. Britprius

    Britprius Senior Member

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    Ok battery volts is not good for a new battery but should make the car ready. Do the side lights work on the car and do the stop lamps come on when you push the brake pedal.
     
    #5 Britprius, Oct 8, 2012
  6. nh7o

    nh7o Off grid since 1980

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    If you can get an assistant to help, use a voltmeter to monitor the voltage on the 12V jump start terminal under the hood. Try starting and see what sort of swing in the voltage you see. If you can get an OBDII reader to check things, so much the better, but it sounds like the ECU is not booting up, so that may not work. I would want to be certain that stable 12V is making it to the electronics up front before pursuing the next step.
     
    #6 nh7o, Oct 8, 2012
  7. r3meyer

    r3meyer New Member

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    Yep, and Yep

    Car start beeping fast as soon as you open the door like the key is in the ignition or the lights are on, or the car is in reverse.
     
    #7 r3meyer, Oct 8, 2012
  8. jdcollins5

    jdcollins5 Senior Member

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    Another thing to check is the negative battery connection to the body ground connection. Make sure this connection is good and tight on both ends.
     
    #8 jdcollins5, Oct 8, 2012
  9. r3meyer

    r3meyer New Member

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    12.64 volt at the jump terminal. Ground is clean, its not the acc battery. Tested against 3 other batteries I have and all give the same results. Even with a low or bad ACC battery the dash would at least come up. I have nothing. It is acting like it wants to come on, but cant.

    I cant get my OBDII scanner to read because I cant get anything to power up. Is there a relay to check, a fuse somewhere I am not aware of?
     
    #9 r3meyer, Oct 8, 2012
  10. nh7o

    nh7o Off grid since 1980

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    Does it go into ACC mode, i.e. Push start but no foot on brake?
     
    #10 nh7o, Oct 8, 2012
  11. r3meyer

    r3meyer New Member

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    Kind of. If I put the key in, and just hit the power button, the Power Button light turns green, but I have nothing else. No screen and no dash. Nothing. Normally all that would light up.
     
    #11 r3meyer, Oct 8, 2012
  12. jdcollins5

    jdcollins5 Senior Member

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    Any chance you got too close to the HV battery and opened the disconnect switch? This is kind of far out there but would give you these symptoms.
     
    #12 jdcollins5, Oct 8, 2012
  13. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Disconnect the negative side of the 12V battery a few minutes to give all ECUs a chance to power down and reset. Then reconnect. See if you can make the Prius READY.

    If not, see if you can turn on the headlights. How bright are they?
     
    #13 Patrick Wong, Oct 8, 2012
  14. nh7o

    nh7o Off grid since 1980

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    We're grasping at straws here, obviously. Check the fusible links under the clear plastic cover, under the jump start terminal. They should all look nice and shiny. Of interest is the 60A P/I.
     
    #14 nh7o, Oct 8, 2012
  15. r3meyer

    r3meyer New Member

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    Yep all shiny and intact. No signs of distress.
     
    #15 r3meyer, Oct 8, 2012
  16. r3meyer

    r3meyer New Member

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    I left everything unplugged for 10+ mins and same results. Head lights are bright, low and hi beams.
     
    #16 r3meyer, Oct 8, 2012
  17. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Use an ohmmeter to check all fuses in the two boxes: one near the inverter and the other under the dashboard on the driver's side.
     
    #17 Patrick Wong, Oct 8, 2012
  18. r3meyer

    r3meyer New Member

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    Ok, did that. All fuses ohm out.
     
    #18 r3meyer, Oct 8, 2012
  19. Patrick Wong

    Patrick Wong DIY Enthusiast

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    I suggest you seek professional help for your Prius, since you can't find any problems...
     
    #19 Patrick Wong, Oct 8, 2012
  20. r3meyer

    r3meyer New Member

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    Is it possible that I set off the Immobilizer?
     
    #20 r3meyer, Oct 8, 2012
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