LR2 has new battery and will not start - Land Rover Forums : Land Rover and Range Rover Forum
 
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post #1 of 9 (permalink) Old 02-04-2014, 04:06 AM Thread Starter
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LR2 has new battery and will not start

I started my 2008 LR2 (56000 miles on it) drove it about 8 miles and parked it. About an hour later I went to start it and it would not turn over and at the same time I got a message "decreased engine performance" then "low battery" and then the car just shut down. No lights, key fob stuck in ignition, etc. Put in a brand new battery (tested twice) got lights, etc. but the car would not turn over. Just a faint "click" when I hit the start button. Anyone else experience this? Any suggestions? Thanks!
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post #2 of 9 (permalink) Old 02-04-2014, 12:52 PM
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Although its a brand new battery are you sure that it is fully charged?
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post #3 of 9 (permalink) Old 02-04-2014, 01:19 PM
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Even if the battery was sold new it doesn't mean it is a good battery.

Battery terminals might not be making a good solid connection, which is the first think I would check. The positive and negative cables are the least expensive items that could cause the problem.

I would suspect the alternator as a possible problem although the new battery should have lasted longer even without the alternator charging properly.
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post #4 of 9 (permalink) Old 02-21-2014, 10:29 AM
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Well every time a battery is tested it losses charge due to the test and this is signs of drainage. You must take the car to a specialist.


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post #5 of 9 (permalink) Old 03-03-2014, 04:58 AM
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There are stories of a bad batch of earth straps that look good at the terminals but are corroded under the insulation. It might be worth fitting an extra earth strap direct from the negative terminal of the battery to one of the starter motor mounting bolts. If that improves things then a new standard earth strap wouldn't hurt.
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post #6 of 9 (permalink) Old 03-05-2014, 01:07 PM
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When the battery went dead in my LR2, it's really low when the key fob won't release, I put it on the charger to get enough juice to release the key. Mine didn't want to start either after a new battery.

I believe I installed a fresh battery in the key fob after cleaning it and then it started with no problems.
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post #7 of 9 (permalink) Old 03-08-2014, 04:31 AM
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There have been big issues with LR2s that the battery drains down slowly on. As voltage gets low, some modules are not able to communicate, which can cause them to do strange things.

What ends up happening is the vehicle will enter Crash Mode due to the lack of voltage, and different modules getting 'confused'. This is not an issue when all power is removed, such as disconnecting the battery, as there is no communication at all then.

Crash Mode sometimes requires a reset with dealer level diagnostic equipment, also sometimes resets itself, and there is a procedure(which I have never had actually work) that involves ignition cycles and remote lock/unlock cycles.

Crash Mode is set by the Body Control Module, and stored in the PCM. Sometimes you can get lucky and the BCM will 'unset' it, but it will still be stored in the PCM, and prevent engine cranking. In this case, clearing fault codes with even just a generic scanner will do the trick.

There is a software update to the BCM available to prevent this, however it is usually only preformed after it has been an issue.

Lastly, there have been several starter motor failures, but this should not coincide with a dead battery, but I would suggest making sure that the battery has actually failed, and was not replaced due to a separate no-crank issue.

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Independent Land Rover Specialists
Chevy Chase, MD
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post #8 of 9 (permalink) Old 01-04-2015, 01:05 PM
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My 2009 LR2 has just changed a new battery 2 months ago at dealer. Today, the car is not able to start, although there are all signs that the battery is working - dash board lights are all on. What is the problem?
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post #9 of 9 (permalink) Old 11-25-2015, 12:41 PM
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Thank you for good communication.


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