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7 Series - E65 / E66 (2002 - 2008)
Discussion of BMW's 4th generation E65/E66 7 Series flagship. The E65 generated much controversy, due to its radical styling and iDrive user difficulties. Nonetheless, the E65 broke records to become the best-selling 7-series iteration ever, especially after its 2005 facelift.

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  #26  
Old 04-27-2017, 06:38 PM
HerbP HerbP is offline
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I ran the diagnostics & finally got the EGS communication to communicate. I had multiple KCAN errors, but I can not clear the passenger front seat module. I ordered a use one & have it on hand. Will I need to program this module, or is it plug & play? I am not sure this is the problem, but at least I can eliminate it!
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  #27  
Old 04-28-2017, 12:50 AM
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Quote:
Originally Posted by HerbP View Post
I pulled the Mechatronic's connector loose & found some oil on the pins, I don't know if this could cause the problem?
If the oil gets there before making the connection, then yes, it creates a film on the contact and acts as an electrical insulator. High frequency signals can "jump" over such a tiny insulator but it will filter out the low frequency components of the signal.

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Originally Posted by HerbP View Post
What modules do the EGS communicate with?
With quite a lot of modules through the PT CAN bus by default. If the bus fails, there are some crucial signals hardwired as a backup.
It talks to CAS, DME, DSC, gas and brake pedal, gear selector, mode selector and the gateway. Not sure if this list is complete.
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Last edited by acoste; 04-28-2017 at 12:53 AM.
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  #28  
Old 04-28-2017, 12:52 AM
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Quote:
Originally Posted by HerbP View Post
I ran the diagnostics & finally got the EGS communication to communicate. I had multiple KCAN errors, but I can not clear the passenger front seat module. I ordered a use one & have it on hand. Will I need to program this module, or is it plug & play? I am not sure this is the problem, but at least I can eliminate it!
I don't think it needs any coding. All this module does is just receiving commands and driving the motors accordingly.
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  #29  
Old 04-28-2017, 08:34 PM
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I did confirm that it is plug & play.

Thanks
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  #30  
Old 05-23-2017, 08:58 PM
HerbP HerbP is offline
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I got the passenger seat module installed & have had in in for 2 weeks. The Can Bus errors seem to be gone, & now I am left with only a no communication with transmission module, EGS module. I can not find anything to tell me why there is no communication with the module, but the tranny shifts without any fail safe messages. I talked with Sonnax tech support today, & he seems to think that the Mechatronic's seal might not be all the way in, keeping the connector from making good contact. Is there any way the locking tab could be in the wrong slot? Looking at the old seal, it would have to be way off for this to happen. How tight a fit is the locking tab & correct slot opening? I am going to try & get a measurement somehow, in the tight confined space. I don't think 3 mm is much more than a match cover, but I could try & get a feeler gauge in the slot.
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  #31  
Old 05-24-2017, 07:31 PM
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I put the car on jack stands & got a decent measurement. I am somewhere around 5 to 6 mm on the seal measurement. I also ran diagnostics again with no communication to the EGS module. I decided to crank the car & run diagnostics, & can communicate with the EGS module? I can clear the faults & run all of the diagnostics while the engine is running, this does not make since to me?
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  #32  
Old 05-24-2017, 10:56 PM
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Quote:
Originally Posted by HerbP View Post
I put the car on jack stands & got a decent measurement. I am somewhere around 5 to 6 mm on the seal measurement. I also ran diagnostics again with no communication to the EGS module. I decided to crank the car & run diagnostics, & can communicate with the EGS module? I can clear the faults & run all of the diagnostics while the engine is running, this does not make since to me?
I think the higher voltage helps when the engine is running.
That would point to a bad connection with some resistance and the higher system voltage pulls up the degraded amplitude.

What is the on the seal measurement? I don't get that part.

Good job on the seat module!
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  #33  
Old 05-25-2017, 07:18 PM
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Measure the supply voltage at the transmission module. Maybe it is not the communication line's fault but the supply voltage's at the module.
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  #34  
Old 05-25-2017, 07:52 PM
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Quote:
Originally Posted by acoste View Post
Measure the supply voltage at the transmission module. Maybe it is not the communication line's fault but the supply voltage's at the module.
I measured the pins that supply voltage to the module. Pins 9, 13, 14, 16 all have around battery voltage, so this indicates no blown fuses or power loss to the connector. The module is internal to the Mechatronic's unit, so I can not measure that. With the engine off in switch 2 mode, there is no communication. With the engine running, There is communication with the module. I do not know if thermal expansion is making the connection between the connector & the module, or what. With 5 to 6 mm of gap at the connector & tranny body, the plug is not fully engaged I suspect. There seems to be a way to seat the locking tab on the seal, without having the seal in the fully seated position. Most of the time this happens, there is usually a related fail safe mode warning. If the Mechatronic's unit was bad, I would think the tranny would shift properly?

The only thing I know to do at this point is to drop the pan, & try and see if I could push the seal in 3 mm more. I wish I could find a pic somewhere that shows the proper groove in the seal for the locking tab. I could remove the seal & plug the connector back in by hand to see if the communication is restored when the connector is fully engaged?

I am open to any suggestions at this point.
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  #35  
Old 05-25-2017, 08:24 PM
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I'm just guessing here but based on the pictures I think it connects the following way, see pic attached.

Maybe buy a new sleeve
http://www.realoem.com/bmw/enUS/show...diagId=24_1014
When the oil pan is off I think you can try to connect the connector without the sleeve see if that makes a difference.
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  #36  
Old 05-25-2017, 09:12 PM
HerbP HerbP is offline
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I have another seal on hand, but that is the only groove I could be in. I suspected that I would need to be in the wide groove to gain 3 more mm. I have read that you can get the lock to engage in the wrong groove. I did not find that pic, but I am thinking I should be in the next groove?

Maybe I need to check the locking collar, to make sure it is locked all of the way. I see a pic of the locking tab on the seal replacement guide, if it is in the correct place. I know that the groove took some abuse getting the seal in, maybe the connector is not pulled all of the way up?
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  #37  
Old 05-26-2017, 12:14 AM
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I am thinking I should be in the next groove?
I don't think there is a "next groove" with improper seating. There are 2 grooves 180 degree from each other, and two lock pins on the connector facing each other.

The groove/opening on the inner plastic wall around the connector pins on the right picture makes sure the connector is in the correct angle and the 2 grooves (mentioned above) make sure it is pushed in completely.
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  #38  
Old 05-26-2017, 01:28 PM
HerbP HerbP is offline
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I am going to find out what the problem is this weekend. I have the car on jack stands, & I am going to inspect the connector locking tab 1st. If it is not pulled all the way up, that might be my problem. I di find one other thread on the 5 Series forum stating that his seal was not pushed all of the way in, & the tab locked into place. I thought last might that maybe the 2nd seal I ordered for my 645 might have been different causing the problem, but they have the same part number. If I have to pull the pan to get the seal out, I am going to pull the valve body to inspect & measure everything. I will take plenty of detailed pics trying to locate the problem.
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  #39  
Old 05-26-2017, 08:39 PM
HerbP HerbP is offline
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I might have found my problem? The locking channel for the connector got damaged while I was trying to install the seal. By all of the pics I have compared to, it looks like the seal is in all of the way. The problem is the connector is not getting completely locked into place. Tomorrow I will decide if I am going to remove the seal, or remove the burs from the seal that is installed. I will make a mark on the tranny for future reference in case I have to remove the seal again.

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  #40  
Old 05-28-2017, 07:13 PM
HerbP HerbP is offline
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The seal was seated properly & I could not get the latch to seat in any other groove. I was around a qt. low on fluid, but I don't see how that could be the problem? The old seal popped back in place with a good push with the hand only. It is possible I got a deformed seal, but we will see? I started to open up the TCM, but it did not want to open up very easily. I will install everything back together & see what happens?
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  #41  
Old 05-30-2017, 07:07 PM
HerbP HerbP is offline
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I installed a new seal & found it would not go in as far as the last one. There was not enough space to get my hand up close enough to push the seal all of the way in. After a 8 , gap I decided to tighten the connector, then use pressure on it to get the seal all of the way in to 3 mm. This might not be the correct way, but the only easy way I found.

I also found that the locking tab will close at 3, 6, & 8 mm gaps. To anyone installing a new Mechatronic seal, do not close up the pan until you have verified the correct gap. This will save you a lot of unnecessary work!

I checked the EGS for communication & it connected ok in the 1st attempt, but had faults after that. I have to find my Can-Bus error somehow without tearing the car completely apart. Can any damage be done to the TCM with the communication responding erratically? Everything shifts fine, but I am tired of chasing my tail!
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  #42  
Old 05-30-2017, 07:18 PM
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I suspect there is a specific reason why the seal doesn't want to sit properly all the way in. Maybe some debris, old rubber seal in there? Metal blades damaged?


There will be no damage due to the communication issue. But the transmission won't shift as smart since it is missing some information.
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  #43  
Old 05-31-2017, 11:26 AM
HerbP HerbP is offline
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I installed a new seal yesterday, & all the pins & connectors were verified with a mirror. I tried the connector out with the Mechatronic's out of the car to verify the fit. I spoke with a TCM repair shop & he said he does not believe that TCM is damaged in anyway. He suspects everything is tied to a Can Bus problem. After reviewing & reading everything I could find on the Web, it is starting to point to the IVM. All of the modules that are having problems communicate with the IVM. The IVM handles a lot of different modules. I will probably pull it out again today & inspect the PCB for any bad solder joints.
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