[GearHead335i]

Originally Posted by e91Owner

When you connect in ISTA, is the DME the only module that it can’t communicate to?

Yes I can connect to CAS, TCU, FRM, etc.

Most of the other faults from other modules were associated with “no message coming from dme”.

There were a few that stuck out though;

1.) CF35 GWS Interface
2.) A0B3 Terminal 50 starter motor
3.) 9D45 Alarm memory - overvoltage or DWA bus; short circuit to positive.

I did also replace the red positive battery terminal as well as the red box that sits on top of the battery and no change.

[GearHead335i]

Anyone? The OEM Integrated supply Module i ordered is currently out for delivery. I am some what thinking that the new aftermarket ISM I ordered was faulty from the beginning bc what I’m experiencing now is the exact same symptoms I experienced when the 15 amp fuse originally blew from the ism.

Now I’m sure the transmission faults and fuel pump faults and no connection to dme could be the result of something else but I feel as if I’ve checked all of the usual culprits and everything seems good. The only thing left is the ism. I trust some aftermarket stuff but not electronics, oem is always the best route.

Say a prayer for me!

[GearHead335i]

Originally Posted by GearHead335i

Anyone? The OEM Integrated supply Module i ordered is currently out for delivery. I am some what thinking that the new aftermarket ISM I ordered was faulty from the beginning bc what I’m experiencing now is the exact same symptoms I experienced when the 15 amp fuse originally blew from the ism.

Now I’m sure the transmission faults and fuel pump faults and no connection to dme could be the result of something else but I feel as if I’ve checked all of the usual culprits and everything seems good. The only thing left is the ism. I trust some aftermarket stuff but not electronics, oem is always the best route.

Say a prayer for me!

Installed oem integrated supply module and nothing, same thing. Really hoping I don’t need a new dme….

[GearHead335i]

Thought I’d update this, removed the dme, took it apart again and sure enough water got in after I sealed it extremely well (or so I thought). Although there was some corrosion, nothing looks blown and I know corrosion can act like a conductor and screw with boards. Pretty certain this is it but worth a try before I drop $500+ on a dme, CAS, and key.

What pisses me off is the reason I took apart the dme in the first place was earlier in this thread when the ism blew. I bet if I never touched it I wouldn’t be where I am now. Sucks.