ON CALL SERVICE REQUIRED

[jnickelson]

I started getting a "On Call Service Required" alert every time I start my 2016 xc90.  Is there a way i can deactivate this alert/service? Does anyone know about this SOS/on call battery that apparently gets low and has to be changed?  I'm in the US.

[Dougray]

I had the same issue on my XC60. The battery is in the VCM module and quite straightforward to replace. I think the VCM is located in a different place in the XC90, but if you can get to it, it's an easy DIY job. Just make sure you depress the locking tab in the connector and the wire is easily disconnected..dont yank it! The genuine battery is quite expensive, but I tried an Ali express one and it as a dud. Having taken the battery pack apart, the cells are actually quite rare and hard to source, so not worth trying to rebuild the battery. You should be able to use orbit to confirm it is the VCM backup battery by using the ECU tools to read the battery voltage off the VCM module.

[Landsicksailor]

Hi, I have a P31489606 (VCM 3G - V90 Inscription Pro D5 (Dec 2016) and in a lazy panic, I lifted the battery pcb connector off the PCB/PWB.

Its a standard SMD connector and i managed to lift all the pads off with it, great and i went into the usual cold sweat.

Okay, i know I'm stupid, but I was under pressure, another story.

I can fix it myself, as have had years of repairing PTH and SMD boards including multilayer layer boards.

But i can only trace 3 of the 4 pins. There are a few PTH nearby but no sign of where the pad was connected.

Can anyone help? Just the pinouts or ideally a circuit diagram of the 8v backup battery connections for the VCM 3G. 

Just using it with a temp fix to keep drivin.

Any ideas? (its my wife's car, hence the panic)

Thank you..