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2008-2013 Cadillac CTS General Discussion Discussion, Battery drain in Cadillac CTS Second Generation Forum - 2008-2013; I have a 2009 CTS that has had an ongoing battery drain. The dealer could not locate. Battery was dead ...
  1. #1
    John Young is offline Cadillac Owners Member
    Automobile(s): 2009 CTS
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    Battery drain

    I have a 2009 CTS that has had an ongoing battery drain. The dealer could not
    locate. Battery was dead this morning and noticed a faint clicking noise on both the driver and passenger doors. Sounded almost like a fan clicking. Pulled the door
    lock fuse and the sound on the drivers door ceased. Pulled the passenger door
    module fuse and the sound on the passenger door ceased. Thought it might be the door lock relay sticking but could not locate relay block in trunk.
    On a side note, my wife
    told me she reset the seat position and pressed the memory button. The chime
    sounded but the new position was not retained. She also said that when
    approaching the car yesterday after shopping, the car was running and the doors unlocked. She does have a habit of carrying multiple key fobs and leaving one in the car which results in the 3 horn beeps after exiting. Not sure if that could be causing the problems. We just had the car in the shop last week. Everything has been
    working well until this morning. PS - she did leave the key fob in the car yesterday but the car started fine afterwards.

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  3. #2
    Tbbt is offline Cadillac Owners Enthusiast
    Automobile(s): '10 CTS4 Prem Wagon-Diamond White-Cashmere
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    Re: Battery drain

    John,

    Welcome! There have been instances of this problem, caused by the seat module. Do a search for more information, I don't remember the details, but it's happened before.

    I just found this info,

    "Here is a TSB for a similar problem on '08s and '09s.

    TECHNICAL

    Bulletin No.: 09-08-50-002A

    Date: September 09, 2009

    Subject: Vehicle Will Not Crank/Start, Battery Goes Dead, Four Amp Draw From Memory Seat Module (MSM) (Reprogram MSM)

    Models:
    2008-2009 Cadillac CTS, CTS-V
    Built Prior to VIN Breakpoint 90160070
    Equipped With EZ-Key RPO UHA, UHF

    Supercede:
    This bulletin is being revised to provide a VIN breakpoint. Please discard Corporate Bulletin Number 09-08-50-002 (Section 08 - Body and Accessories).

    Condition

    Some customers may comment that the vehicle will not crank or start and the battery goes dead.

    If battery electrical drain/parasitic load testing is performed while the condition is present, a four amp draw can be traced to the memory seat module (MSM). The draw will be present until the battery goes dead, the MSM power is disconnected, or the 1 or 2 memory switch on the driver door is pressed.

    Cause

    This condition may be caused by a software conflict within the MSM that causes the low speed GMLAN bus to stay awake if the vehicle detects keyless transmitter number 3 or number 4 and the memory seat recall/easy exit recall is set to ON in the driver information center (DIC).

    Note
    This condition will only happen if all three of the conditions listed below are true.

    - The vehicle has the EZ-key option (RPO UHA, UHF).
    - The memory seat/easy exit recall is set to "On" or "Automatic On".
    - A fob driver ID of greater than number 2 is used.


    Correction

    - A revised calibration has been developed to address this condition.
    - Reprogram the MSM using the Service Programming System (SPS) with the latest calibration available on TIS2WEB. Refer to the SPS procedures in SI.
    - During programming, the battery voltage must be maintained within the proper range of 12-15 volts. Only use the approved Midtronics(R) PSC550 Battery Maintainer (SPS Programming Support Tool EL-49642) or equivalent during programming.
    - When using a Tech 2(R) for reprogramming, ensure that it is updated with the latest software version.
    - When using a multiple diagnostic interface (MDI) for reprogramming, ensure that it is updated with the latest software version."

    Good Luck, Marv
    RAB likes this.

  4. #3
    John Young is offline Cadillac Owners Member
    Automobile(s): 2009 CTS
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    Re: Battery drain

    Thanks Marv,

    This may be the problem. I will contact the dealership with the information.

  5. #4
    hauler's Avatar
    hauler is offline Cadillac Owners Fanatic
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    Re: Battery drain

    I would like to meet the genius who was able to figure out that the conditions named in the service bulletin would cause a dead battery. Diagnosing electrical bugs in cars is getting waaay complicated.

  6. #5
    John Young is offline Cadillac Owners Member
    Automobile(s): 2009 CTS
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    Re: Battery drain

    New development. Just jumped battery and started car. Odometer reads 999,999. Any suggestions?

    ----------

    I tried to reprogram my key fobs to no avail. The car thinks all of my fobs(I have 3), are #4.

  7. #6
    Tbbt is offline Cadillac Owners Enthusiast
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    Re: Battery drain

    Wow! Bizarre. Please let us know what the dealer figures out here! Ugh!!!!!!!!!!

  8. #7
    snafu's Avatar
    snafu is offline Cadillac Owners Member
    Automobile(s): 08 CTS DI AWD Luxury-Performance II ThunderGray/Titanium
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    Re: Battery drain

    [QUOTE=John Young;3584202]New development. Just jumped battery and started car. Odometer reads 999,999. Any suggestions?[COLOR="Silver"]

    You might be spending tooooo much time in your car...
    Did it spark when you hooked up cables?

  9. #8
    Cadillac Cust Svc's Avatar
    Cadillac Cust Svc is offline Cadillac Customer Service
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    Re: Battery drain

    Hello John,

    I am sorry to hear about this frustration you are experiencing with your vehicle! You mentioned that the dealer could not locate what was causing the battery to drain. Was this a recent trip to the dealership? If you could provide more information through a private message, we would be happy to assist further in a resolution for you. Please provide your phone number, VIN, vehicle mileage, and name of involved dealer and we can look into this further for you. Thank you!

    Jessica
    Cadillac Customer Care

    Quote Originally Posted by John Young View Post
    I have a 2009 CTS that has had an ongoing battery drain. The dealer could not
    locate. Battery was dead this morning and noticed a faint clicking noise on both the driver and passenger doors. Sounded almost like a fan clicking. Pulled the door
    lock fuse and the sound on the drivers door ceased. Pulled the passenger door
    module fuse and the sound on the passenger door ceased. Thought it might be the door lock relay sticking but could not locate relay block in trunk.
    On a side note, my wife
    told me she reset the seat position and pressed the memory button. The chime
    sounded but the new position was not retained. She also said that when
    approaching the car yesterday after shopping, the car was running and the doors unlocked. She does have a habit of carrying multiple key fobs and leaving one in the car which results in the 3 horn beeps after exiting. Not sure if that could be causing the problems. We just had the car in the shop last week. Everything has been
    working well until this morning. PS - she did leave the key fob in the car yesterday but the car started fine afterwards.

  10. #9
    hauler's Avatar
    hauler is offline Cadillac Owners Fanatic
    Automobile(s): 2013 Sportwagon 18.2city 28hwy 25hwy AC on
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    Re: Battery drain

    Quote Originally Posted by John Young View Post
    New development. Just jumped battery and started car. Odometer reads 999,999. Any suggestions?
    Drive one mile and restart your warranty from zero..... A poor attempt at humor from a guy who hopes it never happens to his car.

  11. #10
    jeffc83's Avatar
    jeffc83 is offline Cadillac Owners Connoisseur
    Automobile(s): 2008 CTS4 DI Premium
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    Quote Originally Posted by hauler
    I would like to meet the genius who was able to figure out that the conditions named in the service bulletin would cause a dead battery. Diagnosing electrical bugs in cars is getting waaay complicated.
    That's absolutely correct...it took my dealership days to figure out the CEL was being triggered by a short in the wiring from/to the ECM. They did a great job but they did say that I wouldn't want to see that bill let alone pay for it!

  12. #11
    Cadillac Cust Svc's Avatar
    Cadillac Cust Svc is offline Cadillac Customer Service
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    Re: Battery drain

    Quote Originally Posted by jeffc83 View Post
    That's absolutely correct...it took my dealership days to figure out the CEL was being triggered by a short in the wiring from/to the ECM. They did a great job but they did say that I wouldn't want to see that bill let alone pay for it!
    Hello jeffc83,

    I am glad the dealer was able to figure out your vehicle issue. Happy to hear about a satisfying trip to the dealership. Don't hesitate to contact us in the near future with any other concerns or questions.

    Laura M.
    Cadillac Customer Service

  13. #12
    ultimate_ed's Avatar
    ultimate_ed is online now Cadillac Owners Fanatic
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    Re: Battery drain

    I have begun having this same issue with my battery getting drained. I'm taking it to the dealer tomorrow to see if they can figure it out. I'm bringing the text of the TSB as well. I've been searching the forum for battery issues to see if I can find a clue for what they should look for.

    One thing that jumps out at me is the using a key fob greater than #2. This summer, my number 1 fob broke and I bought a replacement. However, the car would only let me program it as FOB 3 and that is what I use now. I suspect I starting having my battery drain issues after programming and using that new FOB.

    The first couple of times I found my battery drained, there was a clicking noise coming from the passenger seat. After the second time, I just unplugged the wiring harness to the passenger seat. But a week later, I had my battery drained again.

    I'll report back and let you know if this TSB fixes my issue.

  14. #13
    agreif is offline Cadillac Owners Member
    Automobile(s): 08 CTS DI AWD
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    Re: Battery drain

    able to resolve this one?

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