Dakota 2WD V8-4.7L VIN J (2005)
Power Distribution Module: Customer Interest
Engine Controls - Engine No Crank/No FCM Communication
NUMBER: 08-060-05
GROUP: Electrical
DATE: November 16, 2005
SUBJECT:
No Engine Crank - Loss Of Communications With Front Control Module
OVERVIEW:
This bulletin involves the diagnosis, and if necessary the replacement, of the Front Control Module (FCM).
MODELS:
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:
T44HUdddy00LKN.
SYMPTOM/CONDITION:
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).
DIAGNOSIS:
1.
Was suspect Front Control Module built prior to julian date "2765" (October 03, 2005)?
a.
If YES >> Proceed to next step.
b.
If NO >> Then this bulletin does not apply.
2.
Verify that the vehicle battery is properly charged and that there are no obvious electrical harness disconnects.
3.
Will the vehicle engine crank?
a.
If YES >> Then this bulletin does not apply.
b.
If NO >> Proceed to next step.
4.
Connect the StarSCAN(R) to the vehicle Data Link Connector (DLC).
5.
Turn the ignition switch to the "Accessory" position (for WK and XK vehicles) or to the "Unlock" position (for HB and ND vehicles).
6.
Using StarSCAN(R), attempt electronic communication with the vehicle Front Control Module (FCM). Does the StarSCAN(R) communicate with
the FCM?
a.
If YES >> Proceed to the next step.
b.
If NO >> Perform the Repair Procedure.
