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17th August 2019, 14:37 | #1 |
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Rover 75 Saloon Join Date: May 2018
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Intermittent Flat Battery
Hi All,
Is it just my car or is is that on these R75's, that if the car is left for more than 4 or 5 days , the cars struggles to start or the battery is completely flat. ( I've had the alternator checked by the AA and is fine). Perhaps they're just power hungry when sitting idle - i.e immobiliser, and other stuff running in the background. any thoughts on this would be welcome. Rgds, John.
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[SIGPIC][/SIGPIC]John (PerciUrwin) |
17th August 2019, 14:58 | #2 |
This is my second home
ZT260 #243 (resting) Join Date: May 2010
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What about the battery itself, have you had it checked?
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17th August 2019, 16:10 | #3 |
same car since 2005
2001 Rover 75 2.0 v6 Connoisseur Saloon Join Date: Nov 2006
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How old is your battery ?
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17th August 2019, 16:48 | #4 |
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Rover 75 Join Date: Sep 2016
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My 75 has been parked for a week on 3 occasions...no trouble starting. Battery the likely culprit when described by your good self.
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17th August 2019, 17:03 | #5 |
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
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John,
Think about how frequently you use the car and the length of your journeys. For example, moving the car on and off the drive or very short trips to the shops doesn't give the alternator enough time to replenish the charge taken by the starter motor. Car batteries last a long time if they're kept fully charged. The reality is that few are. You may need to invest in a smart maintenance charger which can be left connected. Simon
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17th August 2019, 20:33 | #6 |
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MG ZT 135+ Join Date: Jul 2018
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Is your car fitted with hi-line or does it have a gps CD-rom driver fitted in the boot on the right hand side. I've been having similar issue with me battery, would always have a drained battery, I tried different batteries and still it would drain. I thought it could be the alternator regulator but someone told me to disconnect the gps. When my car ignition was turned off the gps was still drawing power from the battery, I've disconnected it and never had the issue since.
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Owner of a 2005 Monogram Dark Fantasy (IBA) MG ZT+ CDTI 135 MKII Facelift. The 6th of a total of 7 ZT saloons and the 1st of 2 CDTI ZT Saloons to be built in Dark Fantasy. |
18th August 2019, 07:13 | #7 | |
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Rover 75 Tourer 2.0 V6 LPG Join Date: Apr 2018
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Quote:
Junked the whole Highline system in the end and fitted an Android head unit instead. Much better system and it don't drain battery |
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18th August 2019, 08:44 | #8 | ||
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
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Sat. Nav.
Quote:
Quote:
So there isn't anything intrinsically wrong with the hi-line sat. nav. system. Coidy and Bullnose75 suffered the consequences of previous owners', or their garages', actions. Simon
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"Whatever is rightly done, however humble, is noble." Sir Henry Royce. Last edited by SD1too; 18th August 2019 at 08:48.. |
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18th August 2019, 09:41 | #9 |
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As it's not been mentioned so far, check to see if the background illumination isn't still lit on the light switch bezel after the car is locked.
This prevents the BCU entering sleep mode, and instead of a quiescent current of 35 to 40 mA, you end up with a constant current of 2.5 to 2.8 A (2500mA) Brian |
18th August 2019, 10:50 | #10 |
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Rover 75 CDTi Connie SE Tourer starlight silver and serpents. MG ZT-T 190+ in Raven Black. Join Date: Mar 2016
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Both my 75 tourer and ZT-T recently stood for 6 weeks whilst I recovered from a hernia operation, nether where started or charged during the lay up and they both started with no problems when I could drive again ( the 75 is a diesel, the ZT-T has sat-nav etc, both were locked and alarmed for the duration ), Both have batteries that are under three years old.
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