this is weird. measuring from the blue connector terminal at the transmission ECU, I have good resistance on these solenoids
MV1 pin 38,21 30.8 ohm
MV2 pin 26,21 29.5
MV3 pin 16,21 30.2

if I'm getting codes for electrical faults, and the wiring and resistances are good down the harness to each of the solenoid valves, the likelyhood of a failing module is higer.

Video on a blown drum.

https://www.youtube.com/watch?v=yQxnRuA-Ako

which I suspect is temperature dependent so the idea of a temp logger is a very good one. Clear the codes and start when cold. Drive until it faults and see what temp. Then cool the ebox with maybe a cool pack or just leaving the lid off. I've had many many cases of computers iPhones and iPads freak out when hot.

Fault memory

SGBD BNTN code Description Vehicle mileage Is currently present?
GS8602 --- 0x000001 EGS: Pressure actuator EDS 1 --- Unknown
GS8602 --- 0x000004 EGS: Pressure actuator EDS 4 --- Unknown
GS8602 --- 0x000010 EGS: Solenoid valve 1 --- Unknown
GS8602 --- 0x000011 EGS: Solenoid valve 2 --- Unknown
GS8602 --- 0x000012 EGS: Solenoid valve 3 --- Unknown
IKI --- 0x00008D IKE: EGS signal line disturbed --- Unknown

its acting like not even connected

as an experiment, i disconnected the 40 pins connector and ran test again
Fault memory

SGBD BNTN code Description Vehicle mileage Is currently present?
DSC57 --- 0x00003A DSC: No message from EGS control unit --- Unknown
GS8602 --- 0x000001 EGS: Pressure actuator EDS 1 --- Unknown
GS8602 --- 0x000004 EGS: Pressure actuator EDS 4 --- Unknown
GS8602 --- 0x000010 EGS: Solenoid valve 1 --- Unknown
GS8602 --- 0x000011 EGS: Solenoid valve 2 --- Unknown
GS8602 --- 0x000012 EGS: Solenoid valve 3 --- Unknown
IKI --- 0x00008D IKE: EGS signal line disturbed --- Unknown
IKI --- 0x0000FB IKE: No CAN identification (EGS) --- Unknown
ME72KWP1 --- 0x0000DC DME: CAN timeout, electronic transmission management (EGS/AGS) 65526 Unknown

And reconnected the 40 pin connector at the transmission controller, then checked and re connected the 16 pin connector at the transmission.
cleared and checked again for codes.

GS8602 --- 0x000001 EGS: Pressure actuator EDS 1 --- Unknown
GS8602 --- 0x000004 EGS: Pressure actuator EDS 4 --- Unknown
GS8602 --- 0x000010 EGS: Solenoid valve 1 --- Unknown
GS8602 --- 0x000011 EGS: Solenoid valve 2 --- Unknown
GS8602 --- 0x000012 EGS: Solenoid valve 3 --- Unknown
IKI --- 0x00008D IKE: EGS signal line disturbed --- Unknown

Measuring resistance of EDS 1 and 4 as per the fault codes; from the 40 pin connector at Transmission Control Module.

EDS1 pin 28,21 7.2 ohm
EDS2 7,21 6.5 ohm

and, from a step above

MV1 pin 38,21 30.8 ohm
MV2 pin 26,21 29.5
MV3 pin 16,21 30.2

Determined from a 'RRPhil' diagram
https://uploads.tapatalk-cdn.com/201...66870195a0.jpg
from another forum the commonality between MV1,MV2,MV3 and EDS1,EDS4 is a power source from the TCM pin 21 which I was not getting any voltage from, as it measured at 0V. I applied a jumper wire with Battery voltage to pin 21, deleted and retested for codes, I got a new set of faults;

Fault memory

SGBD BNTN code Description Vehicle mileage Is currently present?
GS8602 --- 0x000010 EGS: Solenoid valve 1 --- Unknown
GS8602 --- 0x000053 EGS: ECU internal fault 4 (FET) --- Unknown
IKI --- 0x00008D IKE: EGS signal line disturbed --- Unknown
ME72KWP1 --- 0x0000DC DME: CAN timeout, electronic transmission management (EGS/AGS) 65526 Unknown

Removing the jumper, deleting and testing codes again;

Fault memory
SGBD BNTN code Description Vehicle mileage Is currently present?
GS8602 --- 0x000001 EGS: Pressure actuator EDS 1 --- Unknown
GS8602 --- 0x000004 EGS: Pressure actuator EDS 4 --- Unknown
GS8602 --- 0x000010 EGS: Solenoid valve 1 --- Unknown
GS8602 --- 0x000011 EGS: Solenoid valve 2 --- Unknown
GS8602 --- 0x000012 EGS: Solenoid valve 3 --- Unknown
IKI --- 0x00008D IKE: EGS signal line disturbed --- Unknown

Seems like the fault is in the transmission control module.
Now what ? :dunno:

I would take a good look at the solder joints inside the TCU.

The next day, continue, cold operation;

GS8602 --- 0x000001 EGS: Pressure actuator EDS 1 --- Unknown
GS8602 --- 0x000004 EGS: Pressure actuator EDS 4 --- Unknown
GS8602 --- 0x000010 EGS: Solenoid valve 1 --- Unknown
GS8602 --- 0x000011 EGS: Solenoid valve 2 --- Unknown
GS8602 --- 0x000012 EGS: Solenoid valve 3 --- Unknown
IKI --- 0x00008D IKE: EGS signal line disturbed --- Unknown


after delete fault mem and rescan

GS8602 --- 0x000010 EGS: Solenoid valve 1 --- Unknown
GS8602 --- 0x000012 EGS: Solenoid valve 3 --- Unknown
IKI --- 0x00008D IKE: EGS signal line disturbed --- Unknown


remove and inspect the Printed Circuit Board for the Transmission control module

Found a possible over current / shorted trace internal to the multi-layer circuit board, with some damage visible from the top side.
cleaned both sides of board with deoxidizer, brakeclean. hot-aired the connector pin solder points on the back of the board.

reinstall, clear codes, scan again
GS8602 --- 0x000010 EGS: Solenoid valve 1 --- Unknown
IKI --- 0x00008D IKE: EGS signal line disturbed --- Unknown

at this point based on my troubleshooting and what I have observed I am satisfied that the issue has been isolated to the control module having failed.




My next question to the community is;
used modules from ebay - since I have never replaced bmw modules before. can I take a used module from the 4.4 engine with 2003 year and install this, any special procedures ?

attachments;
damage/corrosion on PCB before and after cleaning
corrosion found on dme connector

DME is paired. I don't recall the TCU needing coding but somebody hopefully will follow up. .

The damage you show is in inline with what I was prepared to see based on your errors. Can you see where there damaged trace/s go to put a jumper around them?

TCU ????

The trans module is an EGS module. Why would you want to pair the Bluetooth module?

5HP24 no 1-2-3 no change after valve body replaced
 

https://uploads.tapatalk-cdn.com/202...fafd310097.jpg

I used the generic term because I speak English. I often call the DME the ECU also.