rainforrestguy wrote:
So,after doing a lot of wire tracing I've come to somewhat of a solution, the start motor relay circuit from the ECM was not energizing, I installed a t-splice with a 2ft. pigtail into the dark green/orange wire coming from the ECM and and going to the starter relay, touched the pig tail to earth/ground while holding the key in the start position and I got the engine to crank up beautifully only problem my Libby won't start. I'm totally lost as to what the problem could be other than a bad ECM and have no idea how to check the ECM, does anyone have a test that I can perform? I do happen to also own a 2006 Liberty limited that runs perfectly and I have thought about switching the ECM's to see if my 05 would fire up, the problem is the ECM's have different part numbers and I'm afraid that I may also kill the ECM from my 06. The 05 ECM's part # is P56044 562CC with the GDE eco tune and the 06 ECM's part number is P6044 776BA with no tunes installed, is it possible to put the 06 ECM into the 05 just to check if it will fire up without harming the ECM?
Have you tried putting the Jeep in Neutral as well as Park?
I suspect...as TKB4 stated....that the problem is somewhere in the Transmission wiring that is stopping the ECM from allowing the Starter Relay to activate....try disconnect some plugs on the transmission to see if the engine will turn over via the ignition switch.
You are not really proving anything really by touching Dark Green/Orange wire to ground.
This is only doing what the ECM is trying to do if all conditions to start the Jeep are met by the ECM.
The CRDs basicaly need the ASD Relay to be energized to enable the engine to fire and run....with some other other conditions that are pretty much secret or else anybody could hot-wire the Jeep to steal it.
So we need to see if the ASD Relay is not energizing....check for power over the ASD Relay coil.
The ASD Relay needs ignition to be ON and the SKEES anti-theft system to be happy.
First remove the ASD Relay and jumper female pins 30 to 87 and see if the Jeep will turn over and start when you turn ignition to Start.
It probably will turn over but not start.
Go to Page 8W-30-25 and check the pins shown there on the ECM namely C2 pins 5, 1 and 3 all have +12 volts on them while pin 44 has ground under normal conditions ie. with ASD Relay back in place.
If not then connectors C117 and C105 may need re-plugging or a fuse may be blown.
The best way to measure these wires is to strap a pin/needle to your meter leads and piece the insulation on the relevant color wires.
The ECM may be missing a ground. Look at Page 8w-80-62 for the pinouts of Connector C2 on the ECM.
Pins 2, 4 and 6 all have Black/Dark Green wires going to them.
With ignition OFF check with a meter on OHMs setting that these wires are going direct to chassis/engine/negative battery lead and check if the metal cover of the ECM likewise goes to ground. Check that these wires show +12 volts with respect to Red Battery lead.
Check the ECM is getting +12 volts on C2 pins 1,3 and 5 with ignition ON....these come from the Fused ASD Relay Output. This is on page 8w-80-62 so you can see the wire colors.
Try these actions and get back to us here.