The owner's manual doesn't really give special instructions for reconnecting the car battery except afterward to lock and unlock the doors a number of times with the remote. Yet I've read a number of times about the need to put the key in position II before hooking up the battery cables.
The articles or comments about having the key in pos II mention something to the effect of avoiding damaging some modules. If that's the case, does anyone know how it prevents the damage to the modules and why Volvo didn't include that in the owner's handbook...
Reconnecting a battery...
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br0dy519
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I suspect it is a safety feature more than the theorized component protection. If airbags deploy due to some sort of SRS work being done incorrectly, you’re well out of harm’s way.
I still follow the urban legend religiously and connect it in pos2, but I doubt it is absolutely necessary.
I still follow the urban legend religiously and connect it in pos2, but I doubt it is absolutely necessary.
04s60 2.4
04xc70 2.5t
04xc70 2.5t
prwood wrote:I wish I had a permanent car repair area that was covered, had a level surface, lighting and fans, a workbench, and tool cabinets. You know,like a garage. Much of my time during the job is spent hauling things up and down the stairs to the basement or in and out of the storage shed, or running back downstairs when I realize I need something else,or taking a break from standing out in the sun,or using flashlights or work lamps when it gets dark.
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abscate
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I believe guru jimmy confirmed the above.br0dy519 wrote: ↑01 Nov 2022, 22:39 I suspect it is a safety feature more than the theorized component protection. If airbags deploy due to some sort of SRS work being done incorrectly, you’re well out of harm’s way.
I still follow the urban legend religiously and connect it in pos2, but I doubt it is absolutely necessary.
Empty Nester
A Captain in a Sea of Estrogen
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A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread
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AylmerQc
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OK, thanks.
I see the subject of replacing the little thermistor in the climated module gets a lot of ink online, some have "suggested" I guess, that it got damaged by connecting the battery without having the key in POs II.
I do hope it's just a myth as I've disconnected/reconnected the battery on my XC70 quite a few times recently, and didn't do the key thing...
I see the subject of replacing the little thermistor in the climated module gets a lot of ink online, some have "suggested" I guess, that it got damaged by connecting the battery without having the key in POs II.
I do hope it's just a myth as I've disconnected/reconnected the battery on my XC70 quite a few times recently, and didn't do the key thing...
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volvolugnut
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I started disconnecting/connecting battery without the Position II process long before I read about need to use Position II for removal/connection. I have never had a problem ignoring Position II.
I always disconnect negative cable first and connect negative cable last. This process is also recommended on my Mercedes and Smart cars.
volvolugnut
I always disconnect negative cable first and connect negative cable last. This process is also recommended on my Mercedes and Smart cars.
volvolugnut
The Fleet:
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
And others.
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
And others.
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br0dy519
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I think that's more of a physical wire break issue that happens when people try to clean out that little vent. I have stock of those if you ever need one.AylmerQc wrote: ↑02 Nov 2022, 07:09 OK, thanks.
I see the subject of replacing the little thermistor in the climated module gets a lot of ink online, some have "suggested" I guess, that it got damaged by connecting the battery without having the key in POs II.
I do hope it's just a myth as I've disconnected/reconnected the battery on my XC70 quite a few times recently, and didn't do the key thing...
04s60 2.4
04xc70 2.5t
04xc70 2.5t
prwood wrote:I wish I had a permanent car repair area that was covered, had a level surface, lighting and fans, a workbench, and tool cabinets. You know,like a garage. Much of my time during the job is spent hauling things up and down the stairs to the basement or in and out of the storage shed, or running back downstairs when I realize I need something else,or taking a break from standing out in the sun,or using flashlights or work lamps when it gets dark.
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