Could be roughly the same issue, but hard to say. To even have a clue you need to start eliminating possible causes. You can do it yourself if your good with electrical or shell out the cash to have it looked at. That might invlove leaving it there who knows how long until it can be re-created or finding a tech familiar and willing to check the entire starting circuit.
UPDATE: Just checked the TSB's. You didnt say what year you were having the issues with but for 2000 and 2006 there is a no crank TSB. PM your email and I can send you the PDF.
NOTE: THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A VEHICLE
THEFT ALARM (VTA) SYSTEM (SALES CODE LSA).
Part of “No Start” diagnosis on vehicles equipped with VTSS should include a verification
check of the power supply to the Central Timer Module (CTM). The CTM provides the
Powertrain Control Module (PCM) with an “OK To Start” message via the CCD bus. If the
message is not received by the PCM, the PCM will not allow the engine to start. Initially,
the engine may start and stall but will eventually not start at all. Most CTMs are supplied
battery voltage through the power door lock fuse. An inspection of the fuse should be one
of the initial diagnostic checks performed. If the fuse is operational, a verification check of
the communication system from the CTM can be performed using the DRBIIIÒ. Attempt to
communicate to the CTM. If the CTM does not respond to the DRBIIIÒ, the DRBIIIÒ will
identify a “No Response From Central Timer Module” message. A “No Response From
Central Timer Module” message may indicate that the CTM is not powered up. Please
refer to the “Communication” section of the appropriate Body Diagnostic Procedures
Manual to assist in “No Start” diagnosis due to communication problems from the CTM. In
addition, the “Vehicle Theft/Security” section will aid in the diagnosis of “No Start” issues
involving the VTSS system.
No Engine Crank - Loss Of Communications With Front Control Module
This bulletin involves the diagnosis, and if necessary the replacement, of the Front Control
2006 (HB) Durango
2006 (ND) Dakota
2006 (WK) Grand Cherokee
2006 (XK) Commander
NOTE: This bulletin applies to vehicles built with a Front Control Module having a
module julian build date that is prior to “2765” (October 03, 2005). Julian day
“275” represents calendar day October 03. Julian year “5” represents
calendar year 2005. The build date of the FCM module can be obtained from
the module serial number (S/N) that is on the FCM part label. The FCM part
number label is located on the outside of the FCM module. Inspect the 6th,
7th and 8th digit in the module S/N to determine the Julian day. Inspect the
9th digit in the S/N to determine the Julian year. A module S/N example is:
The customer may experience a condition where the engine may not crank, and therefore
will not start. Investigation by a technician may reveal that there is a total loss of
communications between the scan tool and the vehicle, due to a loss of communications
with the Front Control Module (the “gateway” module).
Last edited by GoldDot; 01-28-2013 at 01:59 PM.
Reason: TSB Update