Grand Cherokee 2WD V6-3.7L (2008)
Engine Control Module: Testing and Inspection
Engine Control Module (ECM)
Replacement ECM's will require programming utilizing the StarSCAN(R) or equivalent. The ECM will not operate the engine until its programmed. A
Diagnostic Trouble Code (DTC) will be set - "not programmed".
CAUTION: Extreme care must be taken when programming a calibration into a generic ECM. Do not randomly select a calibration. Once a
calibration is selected and programmed, the controller cannot be reprogrammed to a different calibration. The module can only be
reprogrammed to a more recent version of that calibration.
SPECIAL TOOLS/EQUIPMENT OR EQUIVALENT REQUIRED:
**REPAIR PROCEDURE - USING THE INTERNET TO RETRIEVE THE FLASH FILE:
NOTE: The StarSCAN(R) or equivalent diagnostic scan tool fully supports Internet connectivity. However, in order to take advantage of this
feature you must first configure the StarSCAN(R) or equivalent for your dealership's network. For instruction on setting up your
StarSCAN(R) or equivalent for the dealer's network; refer to the StarSCAN(R) or equivalent Quick Start Networking Guide available on
DealerCONNECT > Service > StarSCAN and StarMOBILE or equivalent Tools > Online Documentation or at www.dcctools.com website
under the "download center".
NOTE: If this flash process is interrupted/aborted, the flash should be restarted.
1. Open the hood, install a battery charger and verify that the charging rate provides approximately 13.5 volts. Set the battery charger timer to
maintain the charging voltage for the duration of the flash process.
2. Connect the CH9410 StarSCAN(R) or equivalent ethernet cable to the StarSCAN(R) or equivalent and the dealer's network drop.
3. Connect the CH9404 StarSCAN(R) or equivalent vehicle cable to the StarSCAN(R) or equivalent and the vehicle.
4. Power ON the StarSCAN(R) or equivalent.
5. Retrieve the old ECU part number. Using the StarSCAN(R) or equivalent at the "Home" screen:
a. Select "ECU View"
b. Touch the screen to highlight the ECM in the list of modules.
c. Select "More Options"
d. Select "ECU Flash"
e. Record the part number at the top of the "Flash ECM" screen for later reference.
NOTE: For the Cummins Diesel, if the ECM is not operational, the "ECM part number" can be obtained from the label on the
controller. If the label on the controller is not legible, record the "Reference No." for use later. The "Reference No." is located in the
Reference No. box at the top, center of the Engine Data Plate. Do not use the reference number shown in the figure. The Engine Data
Plate is located on the intake side of the breather cover or affixed to the APPS bracket.