0x00008D IKE: EGS signal line disturbed [solved]

[RRPhil]

The 328 valve body assembly is an old spec. with the 9mm main pressure valve land width, the old design of EDS5 damper, the earlier check valve springs, earlier restrictor orifice one-way valves, etc. The 4.8L they’re referencing is the 035 model of the 5HP24 which was used in the E39 B10/E52 Z8. They only made a total of 770 of these transmissions, but this model also used the 353 valve body assembly (the same as the E53 4.6is) so it is not the same as the 4.4L assembly. I’m not suggesting that this is the cause of your current problem, just pointing out that your valve body assembly replacement is the wrong one.

Back to the electrical/electronic stuff. The wiring diagram that you referenced earlier :



I actually produced for the L322 Range Rover. Obviously the E53 and L322 are close sisters but were you able to check that the pin connections are identical for the E53 from the newTIS info, because I haven’t checked this?

Phil

[aureliusmax]

UPdates: Requested a return for the replacement valve body as it's the wrong one, As per RRPhil.

To do:
remove the new valve body from the transmission, and install my old unit.
buy and install a genuine bmw transmission filter, as per RRPhil claiming often times secondary brands can have the filter element sucked inside.
measure all the solenoid and pressure regulator resistances in my existing valve body for reference.

determine the canbus waveform and voltage specifications for my vehicle. start to troubleshoot the circuit and remove modules connected to the canbus until the poor signal / issue can be identified.

update the graphic in the previous post with correct pin numbers and resistances for resistance tests.

[aureliusmax]

I have not been able to make any progress on this issue, very frustrating and this is the first time i feel like I've been defeated as a mechanic, don't know what to do next except park this thing in storage. need to know for sure before sinking money on any replacement part. I absolutely, 100% and for a fact need to pinpoint the issue. Going to try these 'expert for hire' auto mechanic websites, and get a mobile bmw tech who can give a second opinion on the issue.

I did make some notes from my weekend work attempting to give one last try at troubleshooting before having to move the vehicle to storage lot.

Dispite any other code, this one is the issue and is either caused by another code, or this code causes the EGS module to lockout and not sent power to the mechatronics and throw a fit.
0x00008D IKE: EGS signal line disturbed

Tried in sequence order to disconnect other modules on canbus, clear codes, restart car, failsafe mode message appears, and then re-scan for codes.
Disconnected: EGS, IKE, and DSC/ABS I didn't try to disconnect the DME, I didn't think of doing that because how would I start the engine.

I will try it down the road but for now I need the community here to come together and give me their opinions.