@phum now that we have found the diagram for the MAP sensor you need to do the following as regards P0108.
With engine OFF check that Pin 1 on the MAP goes to GND.
The best way to measure these wires is to tape a pin/needle to the ends of both probes on your Multimeter.
This enables you to piece the insulation of the required wires to get to the copper inside...when you have fixed the problem seal up the small holes in the insulation with some glue.
Piece the Gray/Brown wire near pin #1 of the MAP and measure if this wire does go to ground.
With engine ON test that pin #3 Brown/Yellow has + 5 volts.
These two above measurements will probably show up as OK because your fault is intermittent.
You now have to measure these 4 wires from point to point for continuity.
Disconnect the battery and disconnect Connector #1 on the ECM and disconnect the connector on the MAP sensor.
Measure from end-to-end each of the above wires for continuity...the wiring diagram will show the layout of the pins in the Connector #1 at the ECM but you must check the wire colors at all times.
You should get good continuity end-to-end for each wire.
While you are doing the above check that none of these wires have any form of continuity to chassis/ground.
Once again these may show up as OK due to intermittent problem.
If you have no luck with the above...we should assume that this is an intermittent error ie. a wire rubs through to chassis when you go over a bump and the CEL gets set.
A bit drastic now but the next step is to replace the above 4 wires one at a time ie. cut the wire off at both ends a short distance from the connectors. Insulate the cut wire with tape at each end.
Now fit a new wire in place from the MAP to Connector #1 following the existing harness path. Solder the wires in place and insulate them at both ends.
Clear the Codes and test drive the Jeep to see if problem is gone.
Repeat the above for the other wires until hopefully problem is fixed then put the other wires back in place so that only the suspect wire is a new replacement.
Bear in mind that the CEL light will stay ON for a few days even if you have fixed the problem then it should go out by itself or else clear the codes if you are able to. Hopefully at some stage in the wire replacement procedure you will find that the Jeep now runs perfectly!
I was lucky in that while testing the wires with both connectors disconnected ie. wires should be floating in space I found one wire showing some slight continuity to chassis so I replaced that wire...Jeep suddenly had great power and CEL went out after a few days of driving.
Error code P0105 is sort of shown in the DTC index and refers mainly to the MAF sensor so you may have to do the same procedure as above this time with the MAF sensor...assuming this sensor is not faulty or has a bad connection.
The 2006 Jeep KJ Service Manual is a pain as regards the documentation.
Normally the index page has the DTC index right at the bottom of the page. You find your CEL code there and go to the page given and follow the procedure there. Code P0108 is not shown.
The "engine diesel" section starts at page 9-641 and at page 9-689 but does not cover all codes!
Have fun!