Another case of "Can't open the hood" (and 12V batt replacement)

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by [H]ackerK, Feb 22, 2015.

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  1. [H]ackerK

    [H]ackerK Geek

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    Like our plate said... "Yours to discover" :whistle:

    Edit: oh wait, you are from BC... nevermind.
     
    #21 [H]ackerK, Feb 24, 2015
  2. Mendel Leisk

    Mendel Leisk MMX GEN III

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    OntarIo, eh.
     
    #22 Mendel Leisk, Feb 24, 2015
    [H]ackerK likes this.
  3. Mendel Leisk

    Mendel Leisk MMX GEN III

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    For 12 volt battery replacement, maybe they won't even pop the hood?
     
    #23 Mendel Leisk, Feb 24, 2015
  4. [H]ackerK

    [H]ackerK Geek

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    It depends. Tech (and the manual) said I will lost TPMS pairing and "they" have a "special machine" :LOL: to supply power during the removal of aux battery.

    Car was able to start (a few times) w/o problems this afternoon. Perhaps last night just getting a bit too cold and snapped. But I think I was just lucky the original battery lasted seven winters.

    Data point: No load 12.4V. ACC-ON Mode 11.5V. Start up dipped to 10.5V for about a second or two. RUN 14.0V
     
    #24 [H]ackerK, Feb 24, 2015
  5. JimN

    JimN Let the games begin!

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    When I had the battery issues with the 2006 I did not lose the TPMS pairing. The dealer's tech said he had a power supply hooked up to the car when he swapped the battery. I had no reason to doubt him.

    When I swapped out the battery in the 2010 I did not hook up external power. If I lost any settings I didn't notice or didn't mind.
     
    #25 JimN, Feb 24, 2015
  6. Mendel Leisk

    Mendel Leisk MMX GEN III

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    Same thing on ours. I've done disconnects with and without memory saver in place. No subsequent TPMS issues.
     
    #26 Mendel Leisk, Feb 24, 2015
  7. [H]ackerK

    [H]ackerK Geek

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    OK, car is back. Hood not fixed. Lost all the settings and radio stations. But surprise BT pairing still there. Unsure about TPMS will have to wait til tire change later.

    Seems like they didn't hook up that "special machine" to preserve the settings... sigh.
     
    #27 [H]ackerK, Feb 25, 2015
  8. Patrick Wong

    Patrick Wong DIY Enthusiast

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    How could the dealer tech open up the main relay/fuse box to hook up an auxiliary source of 12V power, if the hood would not open?
    What prevented you from asking the dealer service dept to fix that problem while the car was there? It is not reasonable for you to expect the dealer tech to discover and fix the issue, without charging you.
    I don't believe that TPMS resetting is a concern, I have a 2007 with TPMS and there is no issue when disconnecting 12V battery power.
     
    #28 Patrick Wong, Feb 26, 2015
    Last edited: Feb 26, 2015
  9. goldfinger

    goldfinger Active Member

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    When I changed my battery I did it all from the back using jumper cables. Jumper in the new battery while you remove the old. Line them up (observing polarity) and then move both ends of the cables at the same time to the old battery. The car is without power for about a second.
     
    #29 goldfinger, Feb 26, 2015
  10. Mendel Leisk

    Mendel Leisk MMX GEN III

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    You can hook up auxiliary power right at the positive cable and the negative to any bare metal. You can also get an OBD plug, expressly for supplying power. I do the latter now.

    And yeah, think OP should just draw it to their attention, about the hood release.
     
    #30 Mendel Leisk, Feb 26, 2015
  11. [H]ackerK

    [H]ackerK Geek

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    A few minor updates (and things I learn) Went to dealership again and lucky to have a friendly tech to check things out

    - To keep the setting when replacing 12V batt, he said they use a 9V batt at the cigarettes lighter jack
    - The hood problem, slightly uglier than expected. First of all, cable is not broken, but the lock is getting rusty. He said if I bring my car to dealership for reg maint they should "lube the hell out of it everytime" (which I did all the maint at the dealership!) to prevent rusting. So I guess they did a sloppy job at that.
    - After a few try, the hood opens and close ok at first. But eventually it can't close (or lock). Turns out one of the spring was broken. I have read others have this problem. The fix? Hard to describe here, but the tech said it needs tension to pull the latch to the driver side for the hood to lock. He did a quick fix to lock the hood for me.

    After much searching, all I need is a US$2.43 or C$3.72 (P/N 9050616077 "SPRING, TENSION (FOR HOOD LOCK)") but shipping (C$13.55) and labour is going to cost

    I wish I can find a similar spring at princess auto or hardware store to give it a shot.

    I have also read someone said it is easier to replace the whole mechanism (~C$60 for parts) then just the spring, and I that's what the tech [prefer] plans to do on my next visit.

    Anyone has any experience?
     
    #31 [H]ackerK, Mar 5, 2015
  12. nh7o

    nh7o Off grid since 1980

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    Those power outlets are both on relays, so they are disconnected when there is no 12V battery. Your tech does not know this, apparently. You can however use a 9V battery on the jump connections under the hood, with clip leads, to keep the settings from being lost.
     
    #32 nh7o, Mar 5, 2015
  13. Mendel Leisk

    Mendel Leisk MMX GEN III

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    There's a cable available from several vendors, has the cigarette lighter style plug at one end, and an OBDII connector at the other, with just the power supply pins. You hook up to OBD, then plug it into to a jump pack.

    This is the one I got, has an indicator light, if you plug into the obd end first it'll light up if you've got it right.

    Model MS6209 | Associated Equipment Corp.
     
    #33 Mendel Leisk, Mar 5, 2015
    Last edited: Mar 5, 2015
  14. Fore

    Fore Don't look back!

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    Question: If the hood doesn't even pop up, assume I can 'hit' the latch (the one you normally 'touch' under the hood when it pops up a bit), will I still be able to pop the hood?

    I have this problem too from time to time in colder weather. What I do after pulling the latch to no avail I grab underneath the top of the hood near the driver side window wiper area using just my fingers tips I push it up. It works for me and my 2010 version anyways.
     
    #34 Fore, Mar 5, 2015
    Last edited: Mar 5, 2015
  15. valde3

    valde3 Senior Member

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    No it’s still locked. Basically opening hood from the inside will open it a bit and put it on state where it can be completely opened by using that leaver.

    If you can do that your hood was already “popped” or was never closed properly.
     
    #35 valde3, Mar 5, 2015
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