Attempting to configure a spare 2005 LeSabre BCM

RD_Atlanta

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2005 LeSabre
I've seen several posts where the health of the BCM was in question. Since I have (3) active LeSabre's, I thought I would try to configure a spare and share the details with the forum.
The BCM installed my LeSabre's are Denso PN 10389601, which I now have a spare to experiment with. Before I attempt to read the EEprom contents, I need to identify the EErom type. It's the usual SOIC8 package labeled 'S330 DVS2 6290'. According to AI search its likely equivalent to 9366A (8 bit) or 9366B (16 bit).
Is there a member who is really up on EEProms who could help shed some light on which EEprom type this is?
 
I was able to make a spare BCM for my 2005 Buick Lesabre. The physical part about connecting directly to the EEprom & reading / Writing the binary is the same as what I posted for the radios Link . Except for selecting the EEprom type. Google AI indicated that Denso liked to use 93C66a (8 bit) and 93C66b (16 bit). I found that when selecting the 93C66b (16 bit), the EEprom content looked correct. Ultimately I was able to successfully read the original and write it to the spare.

There are a few interesting foot notes:
- As best that I can determine, the Lesabre BCM PN changed in (probably) 2004 from a Denso PN 25712809 to a Denso PN 10389601.
- The module is located just behind the glove box on the 00-05 LeSabre's.
- Though the module is most often referred to as the Body Control Module, the LeSabre factory service manual sometimes refers to it as the BCM (Body Control Module) but more often the DIM (Dash Integration Module). But on all of the replacement parts commerce sites its referred to the BCM.
- I 'think' some of the traditional BCM tasks 'may' have shifted from this module to another module on the LeSabre's? I say this because with the module fully disconnected, there were some functions that worked that I would have expected not to work. For example, it appears the FOB and key IDs all seemed to still work, the power windows and doors still worked and the car's mileage was retained (with the module fully disconnected). I do have VATS disabled in the PCM, which may explain for some of the functions that still worked. But there were other tasks that did not work, such as the auto headlights & Key-in chime. Perhaps someone else has more precise information as to task assignments for each module on the LeSabre's.
- I've ordered a spare Rear Integration module which I will try next and post the results.
 
I always understood the one you are working with is the DIM. It is also the Power Mode Master for the system. A new one will write the VIN into it (from the BCM) on first power up.
The 'other' one, towards the driver's side of the dash, is more of a BCM. It does seem there is some confusion in terms, and through the years, from the early cars ('00-'01) to the later cars ('04-'05). This module definitely handles HVAC and lighting functions, among other things. The part number is not readily seen in my pic.
 

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I was able to make a spare BCM for my 2005 Buick Lesabre. The physical part about connecting directly to the EEprom & reading / Writing the binary is the same as what I posted for the radios Link . Except for selecting the EEprom type. Google AI indicated that Denso liked to use 93C66a (8 bit) and 93C66b (16 bit). I found that when selecting the 93C66b (16 bit), the EEprom content looked correct. Ultimately I was able to successfully read the original and write it to the spare.

There are a few interesting foot notes:
- As best that I can determine, the Lesabre BCM PN changed in (probably) 2004 from a Denso PN 25712809 to a Denso PN 10389601.
- The module is located just behind the glove box on the 00-05 LeSabre's.
- Though the module is most often referred to as the Body Control Module, the LeSabre factory service manual sometimes refers to it as the BCM (Body Control Module) but more often the DIM (Dash Integration Module). But on all of the replacement parts commerce sites its referred to the BCM.
- I 'think' some of the traditional BCM tasks 'may' have shifted from this module to another module on the LeSabre's? I say this because with the module fully disconnected, there were some functions that worked that I would have expected not to work. For example, it appears the FOB and key IDs all seemed to still work, the power windows and doors still worked and the car's mileage was retained (with the module fully disconnected). I do have VATS disabled in the PCM, which may explain for some of the functions that still worked. But there were other tasks that did not work, such as the auto headlights & Key-in chime. Perhaps someone else has more precise information as to task assignments for each module on the LeSabre's.
- I've ordered a spare Rear Integration module which I will try next and post the results.
I used a Driver's Door Module (DDM), Rear Interface Module (RIM), and Remote Keyless Entry receiver (all 2005 LeSabre Limited) in my project too (LeSabre Stereo w/XM, Keyless Entry w/Security system).
 

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Thank you.

This is helpful. So your understanding is (even though this is referred to as a BCM) it's a DIM. Is the 'real' BCM still on the passenger side but closer toward the center or is it on the driver's side?
 
I'm going to keep searching and will update this thread once this has become clearer. Thanks again for your information (CorvairGeek).
 
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According to my factory manual, 'the body control system' comprises of (3) of the following modules.
1. The Dash Integration Module (DIM) located behind the glove box. 99% of all references refer to this as the BCM.
2. The Instrument Panel Integration Module (IPM)
3. The Rear Integration Module (RIM)

Thus far, I can't physically locate a 4th module, but of course, I could be overlooking it. CorvairGreek, would it be possible for you to get me the part number and a close up photo of the one that you are thinking is the BCM? I certainly appreciate your help, together, we'll get this figured out. If anyone else can shed any light, any input is appreciated.
 
I've looked at several stateside GM dealerships websites who in recent years are promoting their online presence for OEM parts. These online parts portals do a fairly good job of listing all parts with drawings/photos. These sites show (3) components within the 00-05 LeSabre 'Body Control System' which is consistent with what the factory service manual shows. I 'think' this concludes that the 00-05 Body Control System has become a distributed control system comprising of the following (3) modules (all of which have been discontinued).
1. The Dash Integration Module (DIM). I think most commercial references refer to this as the BCM.
2. Rear Integration Module (RIM)
3. Instrument Panel Integration Module (IPM).
When the spare Rear Integration Module arrives, I plan to verify that I can create a spare using the same EEprom copy. It will also be interesting to see what functions do not work when the Rear Integration Module is disconnected. I suspect that some traditional 'BCM' tasks were shifted to the Rear Integration Module. Then I'll do the same with the IPM.
 
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Help support this site so it can continue supporting you!
I've looked at several stateside GM dealerships websites who in recent years are promoting their online presence for OEM parts. These online parts portals do a fairly good job of listing all parts with drawings/photos. These sites show (3) components within the 00-05 LeSabre 'Body Control System' which is consistent with what the factory service manual shows. I 'think' this concludes that the 00-05 Body Control System has become a distributed control system comprising of the following (3) modules (all of which have been discontinued).
1. The Dash Integration Module (DIM). I think most commercial references refer to this as the BCM.
2. Rear Integration Module (RIM)
3. Instrument Panel Integration Module (IPM).
When the spare Rear Integration Module arrives, I plan to verify that I can create a spare using the same EEprom copy. It will also be interesting to see what functions do not work when the Rear Integration Module is disconnected. I suspect that some traditional 'BCM' tasks were shifted to the Rear Integration Module. Then I'll do the same with the IPM.
What I referred to as the "BCM" is definitely the IPM. I should have used the GM term. I used aftermarket schematics, so they are always questionable. Unfortunately, I don't have a better picture of it for the part number.
 
Thank you Jerry, you've helped encourage me to want to look deeper into this area. I have two RIMs coming. I'll disassemble one of my dash clusters to get the part number off the IPM and hopefully can get a couple of those ordered. Maybe in the process of copying the EEproms, I can achieve a semi-accurate list for which programmed tasks are handled in each module to share with the forum. It's not as simple as viewing the I/O. For example, the cooling fans are PCM I/O points but by default one of the (3) Body Control System modules control the cooling fans unless you decide to switch the cooling fans control to the PCM (per my previous post in the LeSabre Longevity thread. It's really cool the information sharing that occurs between members in this forum.
 
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