tamugrad2013 Posted July 22, 2017 Report Share Posted July 22, 2017 (edited) Not sure were to post this, but since the battery is an accessory i figured why not here. So I had the battery tested at Autozone yesterday since the car wouldn't start Thursday morning. Their machine said that it had 100% charge, but was a bad battery. I priced around and surprisingly the dealer had the same price as Autozone and O'eillys and they installed it for me, but then the electrical gremlins came out. I got in the car after the battery had been replaced and the check engine light was on the AC would only blow hot air while the climate section of MFT would not light up only the lights on the panel below and when I turned the car off to go back and talk to the service tech the center display and radio wouldn't turn off. The advisor came out with me after I talked to him; the center screen turned off finally and he felt the hot ac and saw the check engine light. He took the car back to the shop and ten minutes later he told me that it must have been electrical gremlins because the ac kicked in as he was driving it to the back and the CEL was a fluke code and was reset. Still after I left the dealership I noticed the insert Nav SD Card issue appeared with my new A7 card and no matter what I did I couldn't get it to recognize the card from a master reset and removing the card turning the car off and letting it re cycle the MFT. What finally seemed to reset it was inserting my old A4 card and letting it load and then reinserting the A7 card. I just thought this might help anyone if they get these gremlins when they replace there battery. Edited July 22, 2017 by tamugrad2013 1 Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted July 22, 2017 Report Share Posted July 22, 2017 Great info, thanks for adding. First time I have heard of this happening AFTER battery replacement. I hope they trained the new battery so it charges properly. Quote Link to comment Share on other sites More sharing options...
tamugrad2013 Posted July 22, 2017 Author Report Share Posted July 22, 2017 Hope so it started right up this morning. 1 Quote Link to comment Share on other sites More sharing options...
akirby Posted July 22, 2017 Report Share Posted July 22, 2017 I wonder if they shorted something during the replacement. I've never had those kinds of issues and I've replaced several batteries the last few years on multiple vehicles. 1 Quote Link to comment Share on other sites More sharing options...
enigma-2 Posted July 23, 2017 Report Share Posted July 23, 2017 NASA had something similar happen on the first shuttle mission. They turned on the shuttle's electrical system and four of the five computers agreed with one another and the fifth one said the rest were full of shit. So they scrubbed the mission. Three days later NASA announced they found the problem. It was a glitch. They fixed it by turning off the shuttle and turning it back on. (Same reason you turn on your modem first, then your wireless router and finally the computer). My guess is, the mechanic may have touched the battery cable to the terminal a couple of times (or more) when making the connection and glitched the car's computers. He could have fixed it by removing the the cable from the terminal for a few seconds and then reconnecting it. 3 Quote Link to comment Share on other sites More sharing options...
chefduane Posted July 23, 2017 Report Share Posted July 23, 2017 (edited) I recently had to put a new battery in my Edge. I bought a Duracell AGM on sale at Sams and so far so good. I was concerned about losing all the presets, nav info, etc when swapping the battery but I used one of those super duper Harbor Fright 9v battery keeper doohickeys that plugs into once of the dc outlets and is supposed to save all the preset info. It worked I guess as I didn't lose anything, but I think it was enigma or akirby that said one of those things wasn't needed anyway. Either way the battery swap was successful. My favorite NASA story: After many years of testing, development, and cost overruns NASA was able to produce the 'Space Pen' that was able to write in 0g, upside down, stainless steel, and went for years before running out of ink. Your tax dollars at work! Years later at a space symposium after the end of the cold war NASA was proud to display their handiwork on the pen. The Russians grunted, smiled, and said "We solve problem 1961!" The Americans were amazed! How were the Russians able to come up with a solution so early!? Russian say "We use pencil!" Edited July 23, 2017 by chefduane 1 Quote Link to comment Share on other sites More sharing options...
tamugrad2013 Posted July 23, 2017 Author Report Share Posted July 23, 2017 I wonder if they shorted something during the replacement. I've never had those kinds of issues and I've replaced several batteries the last few years on multiple vehicles. I sure hope not everything seems to be working great thus far. Battery seems to be holding up nicely. I honestly tossed the idea around in my head to just drive off and see if the problems remedied themselves, but since it was 5:20 pm on a Friday afternoon I figured better let them handle it before they closed. I think it would have fixed itself anyway. 1 Quote Link to comment Share on other sites More sharing options...
enigma-2 Posted July 23, 2017 Report Share Posted July 23, 2017 (edited) The Russians grunted, smiled, and said "We solve problem 1961!" The Americans were amazed! How were the Russians able to come up with a solution so early!? Russian say "We use pencil!" LOL, love it. :happy feet: Edited July 23, 2017 by enigma-2 1 Quote Link to comment Share on other sites More sharing options...
Chipster Posted July 23, 2017 Report Share Posted July 23, 2017 ...I hope they trained the new battery so it charges properly. Can you explain this statement? 1 Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted July 23, 2017 Report Share Posted July 23, 2017 (edited) 2011 and up MY vehicles get the Battery Management System, in which the PCM learns the charging characteristics of the battery installed. So as the battery weakens, the behavior changes accordingly. Basically extracting the most juice for the longest time. So when you replace the weak/dead battery, if you do not reset the BMS, the PCM assumes the same battery is in place, and thus an inappropriate charging strategy is applied. Particularly important if you change from a standard lead acid to another type of battery, since native charge characteristics and capacities are different. So a reset should be done every time a new battery is installed. Forscan may be able to do this, but IDK. It can easily be done DIY if after installing the new battery you leave the car alone (NO interactions) for 8 hours or more. This is the way it was described for 2011-14, not sure if the procedure has been updated for 2015+ (I do not have a Gen 2 manual at this time). Edited July 23, 2017 by WWWPerfA_ZN0W 1 Quote Link to comment Share on other sites More sharing options...
omar302 Posted July 23, 2017 Report Share Posted July 23, 2017 WWWPerA_ZNOW, I believe there are 2 things at play here: 1- State of current battery charge, this is so the vehicle estimates the current battery state of charge (think 0-100% full). This is what gets reset when a vehicle is left untouched for 8+ hours. 2- The characteristics of the installed battery, how fast it charges/discharges and/or how long it keeps a charge. These would change with batter age and once a new battery is installed the BCM needs to know that in order to reset the parameters accordingly. There is also a battery capacity parameter, though as far as I know, does not apply to the Edge (1st gen at least). 1 Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted July 24, 2017 Report Share Posted July 24, 2017 Correct 2011 & newer only. I am glad I don't have that system in my 2007. I think I can manage just fine LOL. 1 Quote Link to comment Share on other sites More sharing options...
omar302 Posted July 24, 2017 Report Share Posted July 24, 2017 ForScan can do the battery reset easily. 1 Quote Link to comment Share on other sites More sharing options...
PrinzII Posted August 4, 2017 Report Share Posted August 4, 2017 Luckily for me, I have never had to deal with battery resets on my 2011 and I had to replace the battery three times since I had it. AZ heat is BRUTAL on batteries. 1 Quote Link to comment Share on other sites More sharing options...
enigma-2 Posted August 4, 2017 Report Share Posted August 4, 2017 ForScan can do the battery reset easily.Just out of curiosity, how do you do this? I've got Forscan and all I seem to be able to do is read the codes. 1 Quote Link to comment Share on other sites More sharing options...
omar302 Posted August 5, 2017 Report Share Posted August 5, 2017 Just out of curiosity, how do you do this? I've got Forscan and all I seem to be able to do is read the codes. Unfortunately I am currently on a vacation & away from from car, hence can't see it to describe it. But it might be a 2011+ thing & therefore wouldn't be on present on your car. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.