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I know the 12v powers the radio, fan, windows, etc, but the most important thing it does it power the brain that controls all these things. Lose it and you will see how helpless you are.
GL
I also submit this tale as a warning that if your 12v battery is 4 or 5 years old, you better get a new one asap. There was no warning at all that it was weak. And remember, do not put your HCH in Park if the battery is weak or dead, it can strand you helplessly.
GL
There is a shift interlock release switch on the center console, up and to the right of the shifter. There probably is a tiny cover you have to wedge off first (my 07 never had a cover, bought it used). Just stick your key (or really any long object that fits in there) and it will mechanically allow the shifter out of Park. As a safety feature, for situations like you described, I'm pretty sure all automatic transmission cars are req'd to have manual override for interlock.
Also, as long as your IMA SOC is decent, the computer just needs a tiny bit of power to send the "Start" command to the system. The IMA pack should always have plenty of power to get the engine running (so long as the SOC isn't so low that it wants to do a 12V start).
The Honda replacement battery #151R is puny and costs $159. I instead bought an Interstate Megatron II #MT-51R for $95. OEM is 335 cca, Interstate is 500 cca.
THe case size is bigger, but it will fit in the HCH space fine, but the plastic tray has to go.
See the pictures attached to get an idea of how much bigger it is, and how it fits. I highly recommend this bigger battery.
I also submit this tale as a warning that if your 12v battery is 4 or 5 years old, you better get a new one asap. There was no warning at all that it was weak. And remember, do not put your HCH in Park if the battery is weak or dead, it can strand you helplessly.
GL
I also just installed the same Interstate Battery 4/4/2012. HOnda wanted 136.00. I went to Firestone Auto Complete. Their web site has a coupon for interstate batteries for 79.99 installed. Make sure before the rign you up that the coupon state "installed." I did advice the auto tech that they have to take the plastic tray out. For some reason I didn't have to set up my radio again with the OEM code. Thanks.
I noticed that when I haven't started my HCH2 for a while (3+days), then it will "crank" to start like a normal car does. If the IMA has some charge and it hasn't been sitting too long, it will start without cranking. Is this the IMA battery starting the car?
Do you guys know that DIY 12v battery replacement with interstate or any other battery void my IMA battery pack warranty?
Also, I went to Firestone to ask them to replace the battery, two store told me to take it to the dealership.
Is there any detailed instruction on how to do this?
Thanks
What am i missing? It's a battery. I've replaced mine once and disconnected it several times and killed it dead a few time. So many times I've memorized my radio code.
I've been running a $39 lawn mower battery for over a year. With no problems.
A battery that is going out can still show 12+ VDC, you should have your battery load tested to find out it's true condition. In California we have Autozone and Kragen / Oreilly stores that will test your battery for free. One quick note:Even a battery with a dead cell may show that it is ok on a volt meter!
Re: 12V Battery Replacement Detailed
