Electrics: - XC90 T6 constant drain on the Battery

Chris Ridley · Jul 2nd, 2020, 09:31

My 2003/4 T6 has developed a battery problem where it has a constant drain of 5 Amps on the battery, is this a known T6 or XC90 issue ?? any idea where to start tracking where the problem is ??

I've removed the fuses one by one in the engine compartment fuse/relay box and the problem still remains ??

Chris

SwissXC90 · Jul 2nd, 2020, 10:18

Pull fuses on the interior fuse boxes as well, there are two:

End of dash, at driver's side. Pop trim panel off to view.

Under the dashboard, remove kick panel with tory driver to view.

A 5A draw should be easy to find

NOTE CAREFULLY that the car does not turn off immediately you switch off the key.
If closed and locked, it takes around 30 sec for the CAN busses to go to sleep. Only then is the vehicle shut down.

Every time you open a door or press a remote button or turn on interior lights or turn the key, the car will wake up again, and many modules will wake up and consume power.

So this is what you need to do:
1. Open driver's door and open boot
2. Remove fuse box covers
3. Setup your multimeter
4. Take key out, wait for the lamp in the boot to turn off (takes a few minutes)
5. Once boot lamp is off, car is asleep, then you can measure power drain when asleep, and start pulling fuses

NMB · Jul 2nd, 2020, 17:49

Questions:

1) Does your radio operate correctly?
2) Do you have a sunroof and does that operate?
3) If your alarm activates does the siren go off or do you just get hazard warning lights?

If the answer is no question one then your radio needs repair/replacement if its no to one or both of the 2nd two questions then id suggests your alarm siren is causing the drain and it needs replacing.

Nigel.

(T6 owner)

Chris Ridley · Feb 16th, 2021, 21:34

FAO, SwissXC90 & NMB, many thanks for taking the time to guide me with this electrical problem, Following your comment I soon realised that the 5 amp current drain I was measuring was obviously pre the Car's electronics going to sleep (SwissXC90), so going back to basics I rechecked the battery and not happy with it's output or ability to hold charge so replaced it and not had the annoying experience of jump starting the Car as a regular event (much to the obvious disapproval of the Good Lady), thanks again. Regards Chris

Harley Dave · Feb 16th, 2021, 23:35

Glad you got it sorted, and thanks for the close out.

Cheers

Dave

Jul 2nd, 2020, 09:31	#1
Chris Ridley Junior Member Last Online: Mar 6th, 2023 16:36 Join Date: Sep 2009 Location: Hall Green, Birmingham	XC90 T6 constant drain on the Battery My 2003/4 T6 has developed a battery problem where it has a constant drain of 5 Amps on the battery, is this a known T6 or XC90 issue ?? any idea where to start tracking where the problem is ?? I've removed the fuses one by one in the engine compartment fuse/relay box and the problem still remains ?? Chris

Jul 2nd, 2020, 10:18	#2
SwissXC90 Premier Member Last Online: Mar 20th, 2024 18:26 Join Date: Jan 2016 Location: Cross Country	Pull fuses on the interior fuse boxes as well, there are two: End of dash, at driver's side. Pop trim panel off to view. Under the dashboard, remove kick panel with tory driver to view. A 5A draw should be easy to find NOTE CAREFULLY that the car does not turn off immediately you switch off the key. If closed and locked, it takes around 30 sec for the CAN busses to go to sleep. Only then is the vehicle shut down. Every time you open a door or press a remote button or turn on interior lights or turn the key, the car will wake up again, and many modules will wake up and consume power. So this is what you need to do: 1. Open driver's door and open boot 2. Remove fuse box covers 3. Setup your multimeter 4. Take key out, wait for the lamp in the boot to turn off (takes a few minutes) 5. Once boot lamp is off, car is asleep, then you can measure power drain when asleep, and start pulling fuses __________________ XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65.

Feb 16th, 2021, 21:34	#4
Chris Ridley Junior Member Last Online: Mar 6th, 2023 16:36 Join Date: Sep 2009 Location: Hall Green, Birmingham	T6, Problem with constant Power Drain on the Battery FAO, SwissXC90 & NMB, many thanks for taking the time to guide me with this electrical problem, Following your comment I soon realised that the 5 amp current drain I was measuring was obviously pre the Car's electronics going to sleep (SwissXC90), so going back to basics I rechecked the battery and not happy with it's output or ability to hold charge so replaced it and not had the annoying experience of jump starting the Car as a regular event (much to the obvious disapproval of the Good Lady), thanks again. Regards Chris

Jul 2nd, 2020, 17:49	#3
NMB Volvo XC90 T6 & XC90 D5 Last Online: Mar 19th, 2024 16:44 Join Date: Jul 2020 Location: Marple	Questions: 1) Does your radio operate correctly? 2) Do you have a sunroof and does that operate? 3) If your alarm activates does the siren go off or do you just get hazard warning lights? If the answer is no question one then your radio needs repair/replacement if its no to one or both of the 2nd two questions then id suggests your alarm siren is causing the drain and it needs replacing. Nigel. (T6 owner)

Feb 16th, 2021, 23:35	#5
Harley Dave Volvo Driver Last Online: Today 18:41 Join Date: Mar 2016 Location: Basingstoke	Glad you got it sorted, and thanks for the close out. Cheers Dave

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