Battery Cable Reset
02-09-2012, 10:19 AM
#1
Suzuka Master
Thread Starter
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Battery Cable Reset
Got this from the OEM Acura Parts Facebook page and thought it may be useful for us RL owners. 
Tim Oem Acura Parts
CAR CARE TIP: Many automotive systems today rely on software. Should that software develop errors, which can happen from something like a low battery or interrupting a learn procedure, it can cause all sorts of odd electrical problems that can be hard to troubleshoot. If you’ve got such a problem, try doing a battery cable reset; it just might do the trick. A battery cable reset forces all capacitors to discharge faster, and clears and resets most control unit volatile memory. It’s like removing and reinstalling the battery in a cell phone that’s acting weird. Before you start, make sure the battery is fully charged. A low battery can cause problems with electronics. Then, get the anti-theft code and write down your audio presets. Now, follow these steps:
1. Turn the ignition switch to LOCK (0), and remove the key. This lessens the chance of voltage spikes.
2. Disconnect the battery cables—negative cable first, then positive.
3. Short the battery cables together with a jumper wire.
4. Turn the ignition switch to ON (II), and wait 10 minutes.
5. Turn the ignition switch to LOCK (0), and remove the key.
6. Remove the jumper wire, and reconnect the battery cables—positive cable first, then negative.
7. Do the required reset/learn procedures for the vehicle you’re working on.
8. Enter the anti-theft code, and restore your client’s settings.
(Acura ServiceNews, January 2012)
CAR CARE TIP: Many automotive systems today rely on software. Should that software develop errors, which can happen from something like a low battery or interrupting a learn procedure, it can cause all sorts of odd electrical problems that can be hard to troubleshoot. If you’ve got such a problem, try doing a battery cable reset; it just might do the trick. A battery cable reset forces all capacitors to discharge faster, and clears and resets most control unit volatile memory. It’s like removing and reinstalling the battery in a cell phone that’s acting weird. Before you start, make sure the battery is fully charged. A low battery can cause problems with electronics. Then, get the anti-theft code and write down your audio presets. Now, follow these steps:
1. Turn the ignition switch to LOCK (0), and remove the key. This lessens the chance of voltage spikes.
2. Disconnect the battery cables—negative cable first, then positive.
3. Short the battery cables together with a jumper wire.
4. Turn the ignition switch to ON (II), and wait 10 minutes.
5. Turn the ignition switch to LOCK (0), and remove the key.
6. Remove the jumper wire, and reconnect the battery cables—positive cable first, then negative.
7. Do the required reset/learn procedures for the vehicle you’re working on.
8. Enter the anti-theft code, and restore your client’s settings.
(Acura ServiceNews, January 2012)
02-09-2012, 01:32 PM
#2
Senior Moderator
Interesting. Turning the ignition on never occured to me. 
02-09-2012, 01:39 PM
#3
02-09-2012, 10:37 PM
#5
Senior Moderator
I have heard of the shorting idea before, and it makes complete sense. Many electronics have a jumper that can be moved and used to reset everything. However, turning the car "on" is an interesting idea. I can't quit wrap my head around the idea, but I also don't try to understand the weird shit that electronics do. The number one step in debugging is to turn it off and then back on. 
Or if you are really clueless, making sure it's plugged in.
Or if you are really clueless, making sure it's plugged in.
11-12-2019, 06:09 PM
#6
1st Gear
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I joined this forum to thank you. I had endless battery problems with my 2012 Acura TL. Changed batteries 3 times in 3 years. Low voltage alerts, sluggish starts in the mornings, random dead battery which could occur any time. I tried your fix (and was skeptical) and immediately all my problems went away. No more voltage alert. No more sluggish starts.
Thank you so much. Something so simple fixed all my issues.
Thank you so much. Something so simple fixed all my issues.
11-25-2019, 06:06 PM
#7
Fascinating. But I wonder how that "Remove the key" stuff is to be applied to keyless systems like ours. Just ignore that part?
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11-25-2019, 06:24 PM
#9
Thanks. I know that, but that alone would have no electrical effect at all; it's just a piece of plastic trim.
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