Does anybody have the wiring diagram for the ECU. Just sent mine off to GDE for the tune/flash and they are having a problem communicating with my ECU. Keith was surprised my Jeep is even running with this ECU. Looks like I have a grounding issue to track down.

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2005 KJ Limited 4X4 2.8L CRD
EHM,
no F37 Recall
Timing Belt Change at 76,000 miles (10 years old)
GDE FT ECO tune
Samco's (Red)
FCV Elbow Kit
Removed FCV/EGR/Cooler and all coolant hoses on driver side
No Muffler, Cat only and 2 1/2" straight pipe
86k miles (Original Owner)
Build Date Apr/05

This is where reading the NOOB guide at the top of this section can assume great import: service manual information is entailed, therein - read thru and weep............................................

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'05 CRD Limited
Pricol EGT, Boost
GDE Hot '11; EDGE Trail switched
SEGR; Provent; Magnaflow;
Suncoast T\C, Transgo Tow'n'Go switch;
Cummins LP module, Fleetguard filter, Filterminder
2.5" Daystar f, OME r; Ranchos; K80767's, Al's lifted uppers
Rubicons, 2.55 Goodyears
Four in a row really makes it go

There is no actual wiring diagram for the ECU internals...shown as a black box in all the circuit diagrams.

You can download the KJ Service Manual of your year model here but it will only give you the names of the connector inputs/outputs which I am sure Keith already knows.

Maybe you are lucky and someone who actually repairs these items chimes in with a circuit diagram.

http://www.colorado4wheel.com/manuals/Jeep/KJ

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2002 Export CRD 2.5 Sport

Fairly certain the dude wants to troubleshoot his KJ wiring to\from the ECM, but I'm sure he can speak for his own self.................

_________________
'05 CRD Limited
Pricol EGT, Boost
GDE Hot '11; EDGE Trail switched
SEGR; Provent; Magnaflow;
Suncoast T\C, Transgo Tow'n'Go switch;
Cummins LP module, Fleetguard filter, Filterminder
2.5" Daystar f, OME r; Ranchos; K80767's, Al's lifted uppers
Rubicons, 2.55 Goodyears
Four in a row really makes it go