–Bought the car in late July of this year.
–Initially the Start/Stop function was working.
–At some point, the Start/Stop function quit working.
–Led to replacing the support battery in early November. Battery voltage was down to about 11.95V.
–Start/Stop still wasn’t working…which led to buying a tool to test the main battery:
Attached image 1739 shows the results. The car doesn’t get driven too much. But, even when it is, the battery wasn’t holding volts much higher than 12.10V.
Image 2342 shows the last test I performed before replacing the battery this morning. Not because I miss the Start/Stop function. Could have squeezed more time out of the battery, but decided it was degraded and old enough to warrant replacement.
In preparation for replacing the battery I purchased:
- Foxwell NT530 as recommended by others in the past, to reset the BMS.
- I can also use the NT530 on my Audi TT RS, when the time comes to replace its battery.
- OBD memory saver from Amazon. Not sure if necessary, but figured it was worth it if precludes having to restore a bunch of settings.
Works on all vehicles with an OBD ll port(1996 or newer).
www.ebay.com
Image 2095 from the NT530, taken on 11/27/24, shows the battery hadn’t been reset since new. In particular, 1826 days is consistent with the 49/19 stamp on the battery.
The below three videos were useful in planning for the replacement. None were specific to the V60, but conveyed the necessary information:
The procedure I followed:
Battery removal:
1. Remove cover panel (left rear side of car).
2. Disconnect light from the cover panel.
3. Connect battery saver to OBDII port. (In my case, powered by 120VAC, not 9V.)
4. Disconnect negative battery terminal (10 mm) and tie out of the way.
5. Disconnect two red cables from fuse box (13 mm) and cover with insulator to prevent inadvertently grounding.
6. Disconnect positive terminal (10 mm).
7. Remove fuse box.
8. Unbolt retaining plate (7 mm) (Note: negative battery cable and fuse box effectively block access to the retaining bolt).
9. Disconnect vent tube.
10. Loosen strap.
11. Remove battery.
Reinstallation:
1. Ensure negative terminal vent plugged on new battery (open item on my installation…plug didn’t come with battery).
2. Install Battery.
3. Reconnect vent tube.
4. Reinstall retaining plate (must be done before reinstalling negative cable and fuse box).
5. Tighten strap.
6. Reinstall fuse box.
7. Reconnect positive terminal.
8. Reconnect two red cables to fuse box.
9. Reconnect negative terminal.
10. Verify vent tube still connected. (Mine got knocked loose while I was fishing the strap from beneath the battery).
11. Disconnect battery saver. (Battery saver transformer was warm to the touch…it was working.)
12. Reset battery using NT530. See Images 2389 and 2390.
13. Reconnect light for cover panel.
14. Reinstall cover panel.