Memory Saver When Changing Battery?

Hi everyone, heading into winter in Canada and I’ve decided that it might be prudent to swap out my OEM battery on my 2018 ORP. No issues, just don’t want to be stranded when the first cold snap comes, lol. There’s no problem with actually replacing the battery, that’s a simple task, but I was wondering if a memory saver device is recommended or if I can just go ahead and disconnect the battery with no issues? I’m an old shade tree mechanic from way back, but I’m a little bit shy about performing electrical work on modern vehicles with so many interconnected sensors and computers. Any recommendations on performing this simple job? Thanks!

 

You may lose your radio pre-sets and on first start the engine my stumble a little. Normal. I disconnected mine recently and it stumbled on the first go 'round. After the 2nd, everything was fine and back to normal.

Oh! You may need to re-sync your windows!

 

The ECU will hold its memory for about 30 minutes. I'm not sure about radio presets, Bluetooth settings, etc, but the ECU will be fine unless you take a really long time to swap out the battery.

 

What does re synch your windows mean? Thanks.

 

I mean the auto up/down feature.



To reset the driver's side power window auto-close:
1. Push down and hold the driver’s door power window switch to completely open the window.
2. Pull and hold up the driver’s door power window switch until the window closes. Continue holding the switch for approximately one second until the switch changes from blinking to a constant illumination.
3. Check for proper operation of the “one–touch open/close” by pushing the switch briefly to the “DOWN” and “UP” positions.

To reset the moonroof one-touch operation:
With ignition switch in the “ON” position, do the following:
1. Push and hold the “TILT UP” side of the switch until the moon roof tilts all the way up and then tilts down slightly (approximately 10 mm [0.39 in.] at the rear).
2. Check for proper operation of the “one–touch slide open/close” and “one–touch tilt up/down” functions by pushing the switch briefly to the “SLIDE OPEN” and
“TILT UP” positions.

To reset the rear window operation:
1. Turn ignition switch to the “ON” position.
2. Push the back door power window switch to the “DOWN” side to open the window.
3. Push and hold the back door power window switch to the “UP” side until the window closes. Continue holding it for approximately 1 second.
4. Check for proper operation of the “one-touch open/close” functions by pushing the switch briefly to the “DOWN” and “UP” position.

 

I agree that it might be time for a battery swap. The first really cold day is when I learn the sad truth about an older battery, disguised by its always starting right up during the warmer months.

I've disconnected my 4R battery a couple times for various procedures with no issues. I don't think I lost my radio presets, but the longest disconnect was only for an hour or so.

 

Not needed. The only thing you'll need to reset after battery replacement is the compass region if you have a separate compass in the rear view mirror.

 

Used to have a 9 volt battery adapter that you could plug into the lighter during a battery change to keep from loosing presets. I have not used it on the 4Runner. It did work on my Tundra.

https://www.tetools.com/memor-eze-computer-memory-saver

 

I just had my original 18’ Panasonic load tested and they said it was ok. I’m reluctant to replace it cause almost all aftermarket batteries I’ve bought leak.