Changing battery
Changing battery
B7 Rs4, will i get away with putting another battery on the front jump points whilst I swap out the battery? Or will it need coding regardless? Cheers all
- PetrolDave
- Cruising
- Posts: 7599
- Joined: Mon Nov 07, 2005 11:28 am
- Location: Southampton, Hampshire UK
Re: Changing battery
No coding needed on the B7 when you change the battery as it doesn't have a battery management system, only MMI cars (i.e. B8) need coding when you change the battery.Madmonkee wrote:B7 Rs4, will i get away with putting another battery on the front jump points whilst I swap out the battery? Or will it need coding regardless? Cheers all
But you will get a G85 yaw sensor fault and many control modules will log fault codes, which you'll need to reset.
Gone: 2006 B7 RS4 Avant (Phantom Black)
Re: Changing battery
Cheers Dave, easy to reset the sensor, i have Vagcom.
Re: Changing battery
Why would this happen when the system is kept "alive" The battery never went dead, it just started playing up when it got cold, so swapped it out.
- PetrolDave
- Cruising
- Posts: 7599
- Joined: Mon Nov 07, 2005 11:28 am
- Location: Southampton, Hampshire UK
Re: Changing battery
Either the battery terminal voltage is low because of the low temperature or when you crank the engine with a battery that's on its way out the high internal resistance of the battery combined with the high current drain will drop the terminal voltage below the low voltage threshold of some modules - which will make them log fault codes.Madmonkee wrote:Why would this happen when the system is kept "alive" The battery never went dead, it just started playing up when it got cold, so swapped it out.
Gone: 2006 B7 RS4 Avant (Phantom Black)
Re: Changing battery
This is what happened on my B6 - as I turned the key to turn the starter motor, everything reset. RNSE wanted code, clock flashed 00:00 hours 01.01.2000 (or similar) etc etc. Only thing on the dash that lit was clock and mileage - plus DIS lit up like a Christmas tree saying 'NO OIL'. No speedo, rev counter, dash lights etc etc. Immediately hooked up to a battery charger, and managed to get the car started after charge, but the damage was already done.PetrolDave wrote:Either the battery terminal voltage is low because of the low temperature or when you crank the engine with a battery that's on its way out the high internal resistance of the battery combined with the high current drain will drop the terminal voltage below the low voltage threshold of some modules - which will make them log fault codes.Madmonkee wrote:Why would this happen when the system is kept "alive" The battery never went dead, it just started playing up when it got cold, so swapped it out.
If you have jump leads, it can only be a good thing to swap batteries without ever disconnecting the power from the car
B5 B6 B7 B9
Re: Changing battery
Update: jump leads onto front jump points and a slave battery. Remove old battery, new one in, connect up. Jump leads off, all good!! Drove to work and back (45 mins each way) no errors as yet. I've not had time to plug her in to check anything hidden.
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