Maintenance Mode and Battery Voltage

[jsquareg]

Several days ago I noticed a post in one of the forums that contained the following embedded in a thread. I copied a portion of the post (shown below) and saved it to a file in my archives. I have tried to find it again in the forums using various search terms but cannot. The problem is when I press on the Menu field there is no 'signals' button. Lots of other things but no 'signals'.



*** Portion of thread:

My 2004 Prius has 125k miles and the original 12v battery is fine as well. A number of batteries were delivered in a weakened state by dealers who let them fully discharge while in their care.

You can do a quick check of your battery status using the MFD and the Maintenance mode screens:

In ACC mode press and hold the MFD info button while turning the lights on and off three times to go into Maitenance mode
Press the on-screen menu field
Press signals - the battery voltage is shown and should be about 12.4 volts
Press the power button (no brake pedal) to put a current load on the battery - the

voltage should stay above 12v
Now put the car into ready mode (press brakes and hit power again) - the battery is

now charging at about (or just under) 14v
turn to car off to get out of maintenance mode

**** End of thread portion

I would like to find that thread again so that I may review it in its entirety. Or, failing that, find a way to get to the point where the battery voltage appears on the MFD.

Can someone help me out here?

Thank you very much.

[timberwolf]

About half way down the web page you'll find an alternative method, which works on my Prius.

12 Volt (12v) Toyota Prius Auxilary Battery for 2004, 2005, 2006, 2007, 2008 and 2009 with free shipping

[jsquareg]

Originally Posted by timberwolf

About half way down the web page you'll find an alternative method, which works on my Prius.

12 Volt (12v) Toyota Prius Auxilary Battery for 2004, 2005, 2006, 2007, 2008 and 2009 with free shipping

Thank you.

Sorry, but I don't know which web page you are referring to. Guess it is too early in the morning for me.

[timberwolf]

Erm, Sorry I meant click on the link that I provided, hopefully you web browser displays the link in my message as underlined or different colour (the text begins with "12 Volt (12v) Toyota Prius Auxilary Battery for...").

(BTW I've got a nasty dose of flu at the moment so don't expect me to make too much sense - hehe at least I've got an excuse this time!).

[jsquareg]

Originally Posted by timberwolf

Erm, Sorry I meant click on the link that I provided, hopefully you web browser displays the link in my message as underlined or different colour (the text begins with "12 Volt (12v) Toyota Prius Auxilary Battery for...").

(BTW I've got a nasty dose of flu at the moment so don't expect me to make too much sense - hehe at least I've got an excuse this time!).

Got it!

Thanks again.

[richard schumacher]

In mine the smart key has stopped working reliably now that the unloaded battery voltage (measured with a voltmeter at the charge point under the hood and the car OFF) has dropped to 12.1. I've ordered the Optima and kit from Elearnaid.

[avocadoman1]

Originally Posted by richard schumacher

In mine the smart key has stopped working reliably now that the unloaded battery voltage (measured with a voltmeter at the charge point under the hood and the car OFF) has dropped to 12.1. I've ordered the Optima and kit from Elearnaid.

after consistently experiencing weak/limited start-up power from my auxiliary battery, i performed the "battery test" listed on Elearnaid. it showed 10-11 volts after 30 minutes of driving on three different tests.

so, i too, ordered the Optima and kit. should arrive tomorrow.

will let you know results.

[richard schumacher]

Whoa! Yeah, at 10V a lead-acid battery is at death's door. Have you noticed any odd behavior?

[avocadoman1]

what i noticed was that after being parked for 2-3 days, the interior lites were dim, but it would start. any longer that that, and i needed a jump.

anyway, that's all in the past now. did the Optima upgrade yesterday and am not looking back!