papaindigo wrote:
I'll sort of try again, contact Keith and/or Sir Sam. With respect to your comments 1) how on earth not to mention why did you jump the powerline to the body of the ECU, see comment below; and 2) 56044562CB is NOT an ECU model PN # rather it's a program which has nothing much to do with whether or not that ECU can physically be used, # see
viewtopic.php?t=47169 . So
1. if you managed to jump from the battery + terminal to the metal outside housing of the ECU (box on interior fender wall just behind battery) I'm not totally convinced that would fry an ECU as the internal electric components "should" be well insulated from the housing although I suppose it's possible that it's programming got scrambled. You mention error codes so what are/were they? For example a P0129 barometric out of range low suggest maybe a bad or dirty MAP sensor. As to the key issue IIRC that may be a body control module issue but have you used a continuity meter to individually test all (in cab and in engine bay) fuses?
2. per my original post if you need a new ECU then you need find out what PN ECU(s) can be programmed to operate your CRD (05 or 06? manual or automatic transmission?). Any used functional ECU that can be programmed will work although one out of the same model year/transmission is simplest as IIRC all that needs programming is VIN
sorry I missed your first post, to answer your questions I was working on installing a breaker for my trailer brake, red wire runs off the positive end of my terminal and in tightening the bolt down my wrench touched the outside of the ECM creating a small shock. Immediately after doing this, my engine no longer started. I didn't save a fault log for my engine codes unfortunately, since I was led to believe that my ECM was the source of the issue, not the sensors themselves. The dealer also tested the sensors and has decided that they're fine and that the ECM is infact the source of the problem, be it a dead unit, or scrambled programming I'm not sure, however they seem to be convinced it's a dead unit.
I'll contact GDE and see what they can tell me about swapping parts, if I can update one of the old ECM's from a wrecker I'd be happy to go that route as it's a lot cheaper for me.
My jeep is a 2.8 diesel/automatic/power locking and windows with no fancy features aside from A/C, pretty sure I've got the base model.
I tested each fuse with a multi meter, both in cab and in engine bay in the box in front of the battery and I couldn't find any that weren't in perfect working order sadly, reinforcing the though that my ECM took the brunt of that shock. I did think however that the metal casing most likely took most of that shock back through to the grounding on the vehicle, however I'm also a computer tech and I know how sensitive boards can be to static shock.
The error codes I got were P0105 and P0107, there was also a code related to having the wrong key but I don't have the number written down.