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Prius won't start - (Not a bad battery)

Discussion in 'Gen 2 Prius Main Forum' started by SilverHCIC, Aug 25, 2015.

  1. SilverHCIC

    SilverHCIC Junior Member

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    Hi valde3,
    I'm not sure what you mean by "no key light". I guess I never noticed such a light before.
    If the key is not in the slot, a small red icon blinks, which looks like a little car with a key in it. I always thought that was an "alarm" indicator that flashes when the car is not in use. It always flashes periodically when the car is parked. ... Is that the "no key light" you are referring to? Because that light still flashes periodically as it always has if the car is parked and the key is not in the slot. So that seems "normal".

    Also, there are two small, green LEDs (one on either side of the key slot). If the key is not in the slot, the lights are off. As soon as I insert the key FOB into the slot, the green LEDs light up (like normal). I think the key is being recognized just fine.
     
  2. JC91006

    JC91006 Senior Member

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    Let's clarify, do you get any power to get the radio functions working?
     
  3. SilverHCIC

    SilverHCIC Junior Member

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    There's power to turn on the headlights, dome light, lock/unlock the doors, emergency flashers, etc.. All work well and are extremely bright. The 12v battery actually has 12.4 volts, and is quite healthy.
    But I can't turn the radio on, because I can't get the car to either start or even go into Accessory mode. --- Whether I step on the brake pedal or not, depressing the Start button has no effect. So I can't turn on the radio, even if I wanted to.
     
  4. JC91006

    JC91006 Senior Member

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    Is this car salvaged? It seems the car has lost communication with the key fob. Can you try a spare fob? Look under the dash to see if there's any loose wires where the key fob would plug in
     
    #24 JC91006, Aug 26, 2015
    Last edited: Aug 26, 2015
  5. SilverHCIC

    SilverHCIC Junior Member

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    No, the car is not salvaged. I purchased it new. I am the only owner.
     
  6. bisco

    bisco cookie crumbler

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    12.4 volts is not 'quite healthy', it's actually on the cusp of failing. a new battery is 13 volts.
     
    #26 bisco, Aug 26, 2015
    Last edited: Aug 26, 2015
  7. SilverHCIC

    SilverHCIC Junior Member

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    Thanks for the info, bisco. I didn't know. My other Prius starts up just fine with this battery, but it is the original battery. I'll consider replacing both batteries.

    But as I mentioned in one of the earlier posts, I also tried jumping from my Jeep, which had the engine running during the jump process. ... Still nothing.

    Since jumping AND switching batteries has no effect, I don't think it is strictly a dead battery issue. Even if 12.4v is considered "low", it should still start the car, shouldn't it? Before I started this thread, I read all the posts regarding dead batteries first. It sounds like other Prius owners have run their batteries below 12.4 volts before they had problems.
     
  8. JC91006

    JC91006 Senior Member

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    it's not your battery, we're way past that. You can only do more damage by jump starting the car again. I think it's time you seek professional help on this before things get worse
     
    Mendel Leisk likes this.
  9. bisco

    bisco cookie crumbler

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    agreed, it should still start the car.
     
  10. SilverHCIC

    SilverHCIC Junior Member

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    OK, thanks everyone. .... I guess it's time to bring it to the dealer and have them diagnose/fix the problem. I appreciate all the input. Once it's fixed, I'll post the results back here.
     
  11. JC91006

    JC91006 Senior Member

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    If this ends up being a combination meter problem (which I don't think it is), it would be covered under a 9 year extended warranty.
     
  12. SilverHCIC

    SilverHCIC Junior Member

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    Thanks JC. I'll keep that bit of information in mind, when I drop the car off with the dealer.
     
  13. IMkenNY

    IMkenNY Im just being nosy

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    Did you check 15 amp fuse labeled "AM2" Its a common fuse that blows when the inverter circulation pump fails. This scenario is very likely to happen while driving.
    AM2 is located in the engine compartment fuse box .
     
    #33 IMkenNY, Aug 26, 2015
    Last edited: Aug 26, 2015
  14. edthefox5

    edthefox5 Senior Member

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    How many miles on the car?

    Car will run with a bad combo meter.

    Its probably a fuse like poster above says but whatever it is its not good based on the way the car failed. If its a blown fuse something has shorted out and blown it. I hope it is a blown fuse as you'll be able to find the defective part if you know the path its on.
    Look in the black plastic fuse box on the right in the engine compartment.

    The Immobilizer ecu is the circuit that identifies your particular fob code. When that circuit fails all the 12 volt battery stuff like lights work but you get no fob response. I think the lights come on when the fob is inserted as it gets a rfid handshake but its doesn't like the key fob code and will not boot up.

    This is a great car but this is the worst part of this car when it gets an unusual problem. Keep your wits about you if taking the car to the dealer. If you get unlucky and take it to a place without a good hybrid guy they'll just start throwing expensive parts at it till they figure it out.
    Put a cap on the estimate.
    First have them check if codes have been logged. This is imperative and will point to the problem.

    I see your in California but didn't mention the area. Hopefully your near the Bay Area because the best hybrid repair service is Luscious Garage . Google them.
     
  15. SilverHCIC

    SilverHCIC Junior Member

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    IMkenNY & edthefox5 ---
    Thank you for the info. I will definitely check the 15 amp fuse for AM2.
    I also like your suggestions on how to go about negotiating repair with the dealer. I don't want to have somebody just throw expensive parts at the car until it starts working. ... That would be expensive.

    I hope it is just an issue with FOB recognition. Since pushing the Start button with the FOB in the key slot has no effect, it's kind of like the FOB isn't even there. ... Maybe that's the issue. I sure hope so, as a 15 amp fuse would be pretty cheap to replace.
     
  16. SilverHCIC

    SilverHCIC Junior Member

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    BTW - Once I pop the hood and lift the black fuse cover off, are the fuses well identified? Will I be able to identify the fuse for AM2 right away? Is there a "fuse diagram" in the user manual? (I'm not being lazy; I'm at work right now, and the Prius is at home, so I can't just check myself).
     
  17. valde3

    valde3 Senior Member

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    Diagram is inside the fuse box cover.
     
  18. SilverHCIC

    SilverHCIC Junior Member

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    Thank you valde3. I will pop the cover and check any of the fuses that appear to be related to the Start/Ignition system.
     
  19. SilverHCIC

    SilverHCIC Junior Member

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    IMkenNY ---

    YOU ARE AWESOME !!! Thank You for suggesting the fuse for AM2.
    I changed the fuse, and the car starts right up !!! I am soooooo relieved.

    Now, you indicate that this fuse commonly blows when the inverter circulation pump fails. What is the inverter circulation pump, and do you think I can drive the car 15-miles to the dealer to get it fixed? I don't know what an inverter circulation pump is.
     
  20. dolj

    dolj Senior Member

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    The inverter circulation pump is the electric pump that circulates the coolant in the inverter/transaxle cooling circuit.

    The easiest way to test if it is working is to put the car into READY mode and then scoot around to the engine bay. Take off the cap of the inverter coolant reservoir and look down at the surface of the coolant -- if you see the fluid moving (and slightly higher at one end that the other) then the pump is working. If the there is no movement then the pump has failed.

    You can drive a short distance with the pump failed, but you need to stop and let the inverter cool. I wouldn't drive it myself with a failed pump, and , in any case, I think 15 mi would be too far.

    I've attached a photo of where you can find the inverter reservoir, just in case you're not au fait with its location.

    Prius Gen II Inverter Reservoir.jpg
     
    #40 dolj, Aug 27, 2015
    Last edited: Aug 27, 2015