Battery Drain v6 auto

Avulon · 1st November 2017, 12:37

Dad's v6 auto is having a problem with battery drain. There's a continuous drain between 2-3.5Amps (fluctuates a bit) If left over night the battery is flattened. Tests so far have been to disconnect the Alternator (no change) and also to disconnect the highline satnav, amp/radio, and video unit (no change). Short of pullling fuses one by one to try and narrow it down, are there any other likely culprits on a v6 Auto? Connie tourer just about fully loaded: traction control, auto wipers, auto dip mirror, leccy seats etc, OEM xenons, highline, cruise control - No sunroof!

marinabrian · 1st November 2017, 13:18

Quote:

Originally Posted by Avulon

Dad's v6 auto is having a problem with battery drain. There's a continuous drain between 2-3.5Amps (fluctuates a bit) If left over night the battery is flattened. Tests so far have been to disconnect the Alternator (no change) and also to disconnect the highline satnav, amp/radio, and video unit (no change). Short of pullling fuses one by one to try and narrow it down, are there any other likely culprits on a v6 Auto? Connie tourer just about fully loaded: traction control, auto wipers, auto dip mirror, leccy seats etc, OEM xenons, highline, cruise control - No sunroof!

Disconnect the LSM and see if it persists

Brian

Mickyboy · 1st November 2017, 15:26

This is the sort of thing I do when I’m checking for any drains, it’s easier for me to postup a link to YouTube clip than sit here and write it as it will take ages, not only that but if you watch the video you can follow the instructions and it will probably help

https://youtu.be/lgLp8ziCNIs
Mick

Avulon · 1st November 2017, 16:54

Quote:

Originally Posted by marinabrian

Disconnect the LSM and see if it persists

Brian

If disconnecting the LSM does do the trick, does that mean that He'll need the LSM replacing?

Mickyboy · 1st November 2017, 17:34

Quote:

Originally Posted by Avulon

If disconnecting the LSM does do the trick, does that mean that He'll need the LSM replacing?

Yeah if the LSM is faulty you could replace it and get it coded to match the odometer mileage via T4 another program can also do this but I won’t mention it.
I have removed LSM’s before and noticed that the pins where the terminal block connects were heavily corroded
Mick

marinabrian · 1st November 2017, 17:46

Normally a fault on the LSM where the led backlighting remains illuminated, prevents the BCU going to sleep, so instead of a quiescent current of 45mA, you have a constant 2.5 to 3A drain.

You can check this easily, simply look through the window of the car after dark with it locked for at least 10 minutes, if the LSM is illuminated, it's the main culprit and will need replaced.

As the car has factory xenon lamps, you will need an appropriate LSM programmed to suit the car.

I do carry YWC000200 and 201 switches in stock, and can programme them to be plug and play if required

Brian

Avulon · 1st November 2017, 18:57

Thanks chaps, I'll do my best to find out. Has to be by instruction over the phone until I see him next (he's over an hour away from me).

1st November 2017, 12:37	#1
Avulon This is my second home 1.8t Tourer Join Date: Oct 2011 Location: Tanelorn Posts: 4,830 Thanks: 956 Thanked 1,148 Times in 916 Posts	Battery Drain v6 auto Dad's v6 auto is having a problem with battery drain. There's a continuous drain between 2-3.5Amps (fluctuates a bit) If left over night the battery is flattened. Tests so far have been to disconnect the Alternator (no change) and also to disconnect the highline satnav, amp/radio, and video unit (no change). Short of pullling fuses one by one to try and narrow it down, are there any other likely culprits on a v6 Auto? Connie tourer just about fully loaded: traction control, auto wipers, auto dip mirror, leccy seats etc, OEM xenons, highline, cruise control - No sunroof! __________________ Need a T4 ?: T4 Owners Map thanks to Stevestrat ( use at your own risk) Where?: https://en.wikipedia.org/wiki/Tanelorn Mods/Retrofits: PCV vortex 'filter'; bluetooth; inline thermostat; reversing sensors; plenum spyhole ; headlamp washers ; Diy mp3 player replacing CD multichanger; FBH with remote; Headlamp washers; black/chrome front grille, rear blind; Xenon projectors To do: puddle lights; 2 Din cd/nav to fit; boot release button

1st November 2017, 15:26	#3
Mickyboy This is my second home MG ZT CDTI 135 + & MGZT CDTI AUTO 160 & ROVER 75 TOURER CDTI 160 TROPHY YELLOW Join Date: Aug 2013 Location: Hernebay Posts: 4,331 Thanks: 818 Thanked 2,414 Times in 1,141 Posts	This is the sort of thing I do when I’m checking for any drains, it’s easier for me to postup a link to YouTube clip than sit here and write it as it will take ages, not only that but if you watch the video you can follow the instructions and it will probably help https://youtu.be/lgLp8ziCNIs Mick __________________ [SIGPIC][/SIGPIC] T4 Owner Jobs done : new UBP, Spy hole mod, Rear hub(wheel bearing),plenum cleaned and emptied, Inline thermostat fitted,Full service, In car Digital tv/DVD Bluetooth Satnav etc, Replaced UBP, Restored headlights,Fixed airbag connection.replaced HP pump,replaced rear light seals,changed intercooler O rings. Jobs to do: ,replace drivers lock,.[/SIZE]

1st November 2017, 18:57	#7
Avulon This is my second home 1.8t Tourer Join Date: Oct 2011 Location: Tanelorn Posts: 4,830 Thanks: 956 Thanked 1,148 Times in 916 Posts	Thanks chaps, I'll do my best to find out. Has to be by instruction over the phone until I see him next (he's over an hour away from me). __________________ Need a T4 ?: T4 Owners Map thanks to Stevestrat ( use at your own risk) Where?: https://en.wikipedia.org/wiki/Tanelorn Mods/Retrofits: PCV vortex 'filter'; bluetooth; inline thermostat; reversing sensors; plenum spyhole ; headlamp washers ; Diy mp3 player replacing CD multichanger; FBH with remote; Headlamp washers; black/chrome front grille, rear blind; Xenon projectors To do: puddle lights; 2 Din cd/nav to fit; boot release button

1st November 2017, 17:46	#6
marinabrian MG ZT Join Date: Jan 2011 Location: Newcastle Upon Tyne Posts: 20,151 Thanks: 3,565 Thanked 10,837 Times in 5,718 Posts	Normally a fault on the LSM where the led backlighting remains illuminated, prevents the BCU going to sleep, so instead of a quiescent current of 45mA, you have a constant 2.5 to 3A drain. You can check this easily, simply look through the window of the car after dark with it locked for at least 10 minutes, if the LSM is illuminated, it's the main culprit and will need replaced. As the car has factory xenon lamps, you will need an appropriate LSM programmed to suit the car. I do carry YWC000200 and 201 switches in stock, and can programme them to be plug and play if required Brian