Member Since: 18 Jan 2006
Location: Western Australia
Posts: 295
Battery support for IID
I am about to put the hard earned down on a GAP IID however I need information on the following:
The information I have is that when updating an ECU it is preferable to provide some support for the battery in case of draining it.
Can anyone please recommend what are acceptable methods of doing this as I see that battery support units cost more than the GAP tool.
Cheers
RichardK2009 Discovery S 3, BAS tune, EGR Delete, ARB winch bar, Milemarker hyd winch, HF and UHF radios, Rear spare wheel carrier, Roof rack,
Touring: Australian Offroad Matrix IV Camper
26th Apr 2021 9:08 am
daimlermg
Member Since: 31 Jan 2010
Location: N Yorks
Posts: 140
I use a CTEK MSX25 on supply mode wired to the towing socket.
See https://www.disco3.co.uk/wiki/Charging_through_towing_socketFaultmate MSV-2
500,000 plus miles in RR,s and trying for more without breakdowns this time
Gone Lexus RX400h SE
Past Audi A6 avant Qutro
Toyota Supra
Long line of RR's
Had for 40 years but now gone 1935 Daimler and 1937 MG
26th Apr 2021 9:16 am
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10744
you can usually get away with all of these options together
1) charging the battery the previous night
2) turning the interior lights off (hold the center button till it flashes)
3) Having a normal battery charger connected while to do it
26th Apr 2021 9:24 am
aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2463
Just use jump leads off of another vehicleAndrew
D3 2.7tdv6 2005
D4 3.0 SDV6 Commercial died and gone to LR heaven
D5 3.0 SDV6 HSE
26th Apr 2021 11:44 am
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10744
I don’t think that really helps keep the voltage up.
In fact it’s more likely to make it drop over 10 mins +
26th Apr 2021 12:03 pm
RichardK
Member Since: 18 Jan 2006
Location: Western Australia
Posts: 295
Thanks for the suggestions, I see I can use a battery charger, what amperage is suggested, would a 15Amp be OK?
Cheers
RichardK2009 Discovery S 3, BAS tune, EGR Delete, ARB winch bar, Milemarker hyd winch, HF and UHF radios, Rear spare wheel carrier, Roof rack,
Touring: Australian Offroad Matrix IV Camper
26th Apr 2021 1:30 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10744
Yeah. 15 A is fine
26th Apr 2021 1:38 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73134
And when you are reflashing the ECU it really helps if you keep your eyes closed.
26th Apr 2021 3:10 pm
aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2463
[quote="Pete K"]I don’t think that really helps keep the voltage up.
In fact it’s more likely to make it drop over 10 mins +[/quote
Why would it make the voltage drop? If it did you would never be able to jump start another vehicleAndrew
D3 2.7tdv6 2005
D4 3.0 SDV6 Commercial died and gone to LR heaven
D5 3.0 SDV6 HSE
26th Apr 2021 3:38 pm
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8244
RichardK wrote:
Thanks for the suggestions, I see I can use a battery charger, what amperage is suggested, would a 15Amp be OK?
Cheers
RichardK
GAP do not recommend using a battery charger, it must be a power supply.
Before any process is started the Iid tool will do a power check and will not proceed if the battery is not sufficiently charged, I have never found an additional power supply necessary providing you are sensible and don’t get carried away with how long you play with the Iid tool, use a smart battery charger before or after a session for as long as necessary by all means, but not during. It can when others can't,
It will when others won't,
It goes where others don't.
26th Apr 2021 7:04 pm
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8244
[quote="aja4x4"]
Pete K wrote:
I don’t think that really helps keep the voltage up.
In fact it’s more likely to make it drop over 10 mins +[/quote
Why would it make the voltage drop? If it did you would never be able to jump start another vehicle
No reason why jump leads cannot be used if needed providing the donor vehicle engine is kept running and the negative lead is connected to the chassis or engine earth points on both vehicles not the negative battery post and is connected last and removed first to prevent gas from the batteries exploding.It can when others can't,
It will when others won't,
It goes where others don't.
26th Apr 2021 7:23 pm
RichardK
Member Since: 18 Jan 2006
Location: Western Australia
Posts: 295
Thanks all for the information, I can go ahead with any reflashing with confidence hopefully.
I did reflash some years ago with my faultmate and that was no problem but after reading GAP manual thought I would ask some questions.
DSL: Will I need my welding helmet??
Cheers
RichardK2009 Discovery S 3, BAS tune, EGR Delete, ARB winch bar, Milemarker hyd winch, HF and UHF radios, Rear spare wheel carrier, Roof rack,
Touring: Australian Offroad Matrix IV Camper
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