Edmunds Answers

Voted Best Answer

  • avatar MrShift@Edmunds 09/27/08 11:58 am PST

    The BCM integrates and networks many of your car's functions. If the computer says it's bad, it probably is either the module or the wiring or connectors. I suppose you could negotiate a deal where if that DOESN'T cure your problem, then they take it out and don't charge you.

    Here's a list of functions of the BCM. You can see it controls a lot of things:

    Body Control Module
    The various body control module (BCM) input and output circuits are described in the corresponding functional areas indicated on the BCM electrical schematics. The BCM functions include the following:

    • A/C compressor request-Refer to Air Temperature Description and Operation in HVAC Systems - Manual.
    • A/C cooling fan-Refer to Air Delivery Description and Operation in HVAC Systems - Manual.
    • Battery rundown protection (inadvertent power)-Refer to Interior Lighting Systems Description and Operation in Lighting Systems.
    • Bulb check-Refer to Instrument Panel Cluster (IPC) Description and Operation in Instrument Panel, Gages, and Console.
    • Chimes-Refer to Indicator/Warning Message Description and Operation in Instrument Panel, Gages, and Console.
    • Check gages
    • Door ajar warning
    • Headlamps ON
    • Key-in-ignition
    • Oil reset
    • Park brake warning
    • Seat belt not fastened
    • Turn signal ON
    • Door lock interface-Refer to Power Door Locks Description and Operation in Doors.
    • Electronic power steering (EPS)-Refer to Power Steering System Description and Operation (Electronic Power Steering) Power Steering System Description and Operation (Hydraulic Power Steering) in Power Steering System.
    • Engine coolant level sensing-Refer to Cooling System Description and Operation in Cooling System.
    • Exterior and interior lighting control-Refer to Exterior Lighting Systems Description and Operation in Lighting Systems.
    • Automatic lighting control
    • Daytime running lamps (DRL)
    • Fog lamps
    • Park brake lights
    • Turn hazard lamps
    • Gage control-Refer to Instrument Panel Cluster (IPC) Description and Operation in Instrument Panel, Gages, and Console.
    • Horn interface-Refer to Horns System Description and Operation in Horns.
    • Instrument cluster indicator control-Refer to Instrument Panel Cluster (IPC) Description and Operation in Instrument Panel, Gages, and Console.
    • Interior lighting-Refer to Interior Lighting Systems Description and Operation in Lighting Systems.
    • Key-in-ignition sensing-Refer to Indicator/Warning Message Description and Operation in Instrument Panel, Gages, and Console.
    • Parking brake state sensing-Refer to Brake Warning System Description and Operation in Hydraulic Brakes.
    • Retained accessory power (RAP)-Refer to Retained Accessory Power (RAP) Description and Operation.
    • Rear compartment interface-Refer to Power Door Locks Description and Operation in Doors.
    • Rear defogger-Refer to Rear Window Defogger Description and Operation in Heated Glass Element.
    • Remote function control-Refer to Keyless Entry System Description and Operation in Keyless Entry.
    • Seat belt use sensing-Refer to Seat Belt System Description and Operation in Seat Belts.
    • Content theft deterrent-Refer to Theft Systems Description and Operation in Theft Deterrent.
    • Vehicle theft deterrent-Refer to Vehicle Theft Deterrent (VTD) Description and Operation in Theft Deterrent.
    • Washer solvent level sensing-Refer to Wiper/Washer System Description and Operation in Wipers/Washer Systems.
    • Wiper/washer-Refer to Wiper/Washer System Description and Operation in Wipers/Washer Systems.



Answers

  • MrShift@Edmunds 09/27/08 11:58 am PST

    The BCM integrates and networks many of your car's functions. If the computer says it's bad, it probably is either the module or the wiring or connectors. I suppose you could negotiate a deal where if that DOESN'T cure your problem, then they take it out and don't charge you.

    Here's a list of functions of the BCM. You can see it controls a lot of things:

    Body Control Module
    The various body control module (BCM) input and output circuits are described in the corresponding functional areas indicated on the BCM electrical schematics. The BCM functions include the following:

    • A/C compressor request-Refer to Air Temperature Description and Operation in HVAC Systems - Manual.
    • A/C cooling fan-Refer to Air Delivery Description and Operation in HVAC Systems - Manual.
    • Battery rundown protection (inadvertent power)-Refer to Interior Lighting Systems Description and Operation in Lighting Systems.
    • Bulb check-Refer to Instrument Panel Cluster (IPC) Description and Operation in Instrument Panel, Gages, and Console.
    • Chimes-Refer to Indicator/Warning Message Description and Operation in Instrument Panel, Gages, and Console.
    • Check gages
    • Door ajar warning
    • Headlamps ON
    • Key-in-ignition
    • Oil reset
    • Park brake warning
    • Seat belt not fastened
    • Turn signal ON
    • Door lock interface-Refer to Power Door Locks Description and Operation in Doors.
    • Electronic power steering (EPS)-Refer to Power Steering System Description and Operation (Electronic Power Steering) Power Steering System Description and Operation (Hydraulic Power Steering) in Power Steering System.
    • Engine coolant level sensing-Refer to Cooling System Description and Operation in Cooling System.
    • Exterior and interior lighting control-Refer to Exterior Lighting Systems Description and Operation in Lighting Systems.
    • Automatic lighting control
    • Daytime running lamps (DRL)
    • Fog lamps
    • Park brake lights
    • Turn hazard lamps
    • Gage control-Refer to Instrument Panel Cluster (IPC) Description and Operation in Instrument Panel, Gages, and Console.
    • Horn interface-Refer to Horns System Description and Operation in Horns.
    • Instrument cluster indicator control-Refer to Instrument Panel Cluster (IPC) Description and Operation in Instrument Panel, Gages, and Console.
    • Interior lighting-Refer to Interior Lighting Systems Description and Operation in Lighting Systems.
    • Key-in-ignition sensing-Refer to Indicator/Warning Message Description and Operation in Instrument Panel, Gages, and Console.
    • Parking brake state sensing-Refer to Brake Warning System Description and Operation in Hydraulic Brakes.
    • Retained accessory power (RAP)-Refer to Retained Accessory Power (RAP) Description and Operation.
    • Rear compartment interface-Refer to Power Door Locks Description and Operation in Doors.
    • Rear defogger-Refer to Rear Window Defogger Description and Operation in Heated Glass Element.
    • Remote function control-Refer to Keyless Entry System Description and Operation in Keyless Entry.
    • Seat belt use sensing-Refer to Seat Belt System Description and Operation in Seat Belts.
    • Content theft deterrent-Refer to Theft Systems Description and Operation in Theft Deterrent.
    • Vehicle theft deterrent-Refer to Vehicle Theft Deterrent (VTD) Description and Operation in Theft Deterrent.
    • Washer solvent level sensing-Refer to Wiper/Washer System Description and Operation in Wipers/Washer Systems.
    • Wiper/washer-Refer to Wiper/Washer System Description and Operation in Wipers/Washer Systems.



  • karjunkie 09/27/08 12:37 pm PST

    If 3 independent garages told you it is the BCM then I think it probably is. My response had to do with your park lock problem. If you want to be extra sure before spending big bucks,
    I would go to Car Talk's Mechanics Files site at

    http://www.cartalk.com/content/mechx/fi
    nd.html


    Enter your zipcode and you will get a list of mechanics in your area that other consumers have used and highly recommend. Look for ones that specialize either in the make of your car or the type of repair you need. Call 2-3 of them and ask for a ballpark figure on the repair. I have personally used this site with great success to find good honest mechanics and can highly recommend it. Good luck!

  • jetts 12/26/11 10:25 pm PST

    Im not here to answer your question because im having the same issues as you are with your G6. Its hard to find good information here in Canada lol. But my question is did you get the BCM replaced and did it fix your issue's.

ADVERTISEMENT

Top Lights Brake lights Experts View More

Rank Leader Points
1. karjunkie 340
2. MrShift@Edmunds 325
3. zaken1 250
4. docj 225
5. boomchek 60
6. 0patience 45
7. canddmeyer 45
ADVERTISEMENT