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sprinkles08
sprinkles08, ASE Certified Technician
Category: Car
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Experience:  ASE Master and Advanced level certified. Factory trained with 14 years dealership experience
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Buick LaCrosse CXS: I have a 2010 Buick Lacrosse CXS. I recently

Resolved Question:

I have a 2010 Buick Lacrosse CXS. I recently replaced the Battery on July 31, 2013. I went to get in my vehicle on Tuesday, September 3rd. The car was completely dead, I received a jump took it to the dealer where it is still currently and they can't seem to find the cause of the battery drain. They want to put a Data Recorder on the car for 2 weeks. What will that accomplish. Nothing was left on in the vehicle and the remotes were not left in the vehicle.
Submitted: 10 months ago.
Category: Car
Expert:  sprinkles08 replied 10 months ago.

Hello and welcome to JustAnswer!

 

An intermittent battery draw can be a very tough thing to diagnose. What they've surely done is set up an ammeter to measure the amount of draw after the car goes to sleep, and it sounds like they've found the problem is no longer there. It may not return again at all, or it may be an intermittent problem that could act up every couple days or even weeks.

 

It's not unheard of for a control module to stay awake when the car should go to sleep. This will not only draw power because it is staying awake, but it can also cause other modules to stay awake because there is still communication bus activity. A power cycle will often bring a locked up module back to life, so when the battery dies the problem can go away.

 

Installing a data recorder on the car will allow them to record data from modules on the car and then play that back at the shop, basically it allows them to see much of the data that they could on a scan tool but it allows you to keep driving the car and hopefully get it to act up. There is a better chance of it acting up while you are using the car as you normally do than with it sitting in their parking lot.

 

 

sprinkles08, ASE Certified Technician
Category: Car
Satisfied Customers: 16481
Experience: ASE Master and Advanced level certified. Factory trained with 14 years dealership experience
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