DuboisLJ

I have a 2016 legacy 2.5 limited. As of 2021 I've replaced 3 batteries and about to put my 4th in. I did a drain check and on Fuse 9 under hood/main fuse box I get 0.6 amp drain then when I pull the fuse it drops to 0.06 amps. This feeds the Data Communication Module / DCM.

How long should it take for the DCM to go into sleep mode?

Has anyone changed out a DCM, how tough is it?

Per the manual it looks like you have to pair the DCM to the car, can that be done by a DIY person?

I don't use starlink or SOS or Info button on Telemetric do I absolutely need to pair the DCM?

What have others identified with dead batteries.

I didn't follow the procedure in post number 3 to the letter but an amp clamp on the wire, either positive or negative results in around .65 amps which is about 10 times the suggested limit of .070 amps. I'm going to try to run through that test as suggested but it's written extremely poorly, especially on the part with the buss bar which my car has.

 

 

The battery also still tested as failed after 18 hours on a trickle charger. Did only slightly better, 280 amps at 9 volts.

 

A friend was charging his phone in my car an left a USB deal plugged in to the 12v socket, that could also be a part of the draw, remembered it just now.

 

A draw down test, will have to look that one up.

What did you find what your issue was? I have a similar draw of ~0.6 amps. When I pull DCM (data communications module) fuse the amps drop within spec ~0.05 amps