Drivetrain Controls - 'SERV 4WD' Lamp ON/DTC C144A Set
NUMBER: 08-029-06GROUP: Electrical
DATE: June 22, 2006
THE StarSCAN(R) FLASH FILES FOR THIS BULLETIN MUST BE RETRIEVED FROM THE INTERNET.
StarSCAN(R) UPDATE CD 6.05 WAS THE LAST CD TO CONTAIN FLASH FILES.
SUBJECT:
Flash: "SERV 4WD" Lamp Illuminated Due To DTC C144A
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Final Drive Control Module (FDCM) with new software.
MODELS:
2006 (DH) Ram Truck-H.D.
NOTE:
This bulletin applies to Ram Truck 2500 Power Wagons equipped with a 5.7L engine (sales code EZA) built on or before May 19, 2006 (MDH 0518XX).
SYMPTOM/CONDITION:
The vehicle operator may experience the illumination of the "SERV 4WD" lamp in the instrument cluster. The illumination may occur only when the transfer case is in the 4L0 position while an attempt is made to lock the rear axle.
Diagnosis may reveal that the "SERV 4WD" lamp has illuminated due to Diagnostic Trouble Code (DTC) - C144A.
DIAGNOSIS:
1. Using a Scan Tool (StarSCAN(R)) with the appropriate Diagnostic Procedures available in TechCONNECT, verify all engine systems are functioning as designed. If DTCs are present record them on the repair order and repair as necessary before proceeding further with this bulletin.
2. In a safe driving area (parking lot), start the vehicle and while traveling at less than 5 kph (3 mph) in neutral, shift the transfer case into the 4L0 position.
3. Verify that the transfer case is in 4L0.
4. Rotate the axle locker selector from "Axle Unlock" to "Rear Lock" position.
5. Determine if the "SERV4WD" lamp has illuminated.
6. If the "SERV 4WD" lamp has illuminated due to DTC C144A, perform the Repair Procedure.
7. Return the transfer case to 2H1, place the transmission in park or in gear, and turn the ignition switch to the OFF position. Set parking brake.
SPECIAL TOOLS / EQUIPMENT REQUIRED:
REPAIR PROCEDURE - USING THE INTERNET TO RETRIEVE THE FLASH FILE:
NOTE:
Before performing this Repair Procedure, the operating software in the StarSCAN(R); must be programmed with software release level 6.06 or higher.
The software release level is visible in the blue header at the top of the StarSCAN(R) screen.
NOTE:
The StarSCAN� diagnostic scan tool fully supports Internet connectivity. However, to take advantage of this feature you must first configure the StarSCAN� for your dealership's network. Make sure the StarSCAN� is configured to the dealership's network before proceeding. For instruction on setting up your StarSCAN� for the dealer's network refer to either:
"DealerCONNECT > Service> StarSCAN and StarMOBILE tools > Online Documentation", or refer to the StarSCAN(R) Quick Start Networking Guide. The StarSCAN(R) Quick Start Networking Guide is also available on the website under the "Download Center".
NOTE:
If this flash process is interrupted/aborted, the flash should be restarted.
1. Install a battery charger and verify that the charging rate provides approximately 13.2 - 13.8 volts. Set the battery charger to continuous charge. Do not allow the charger to time out during the flash process. Remove the charger from the battery when the flash process is complete.
2. Connect the CH9410 StarSCAN(R) ethernet cable to the StarSCAN(R) and the dealer's network drop.
3. Connect the CH9404 StarSCAN(R) vehicle cable to the StarSCAN(R) and the vehicle.
4. Power ON the StarSCAN(R).
5. Select "ECU View"
6. Touch the screen to highlight the FDCM in the list of modules.
7. Select "More Options"
8. Select "ECU Flash"
9. Record the part number at the top of the "Flash FDCM" screen for later reference.
10. Select "Browse for New File". Follow the on screen instructions.
11. Highlight the appropriate calibration then select "Download to Scantool".
12. Select "Close" after the download is complete, then select "Back".
13. Highlight the listed calibration.
14. Select "Update Controller". Follow on screen instructions.
15. When the FDCM update is complete, select "OK".
16. Verify the part number at the top of the "Flash FDCM" screen has updated to the new part number.
NOTE:
Due to the FDCM programming procedure, a DTC may be set in other modules (PCM, TCM, BCM, MIC, SKREEM, etc.) within the vehicle, if so equipped. Some DTC's may cause the MIL to illuminate. From the "Home" screen select "System View". Then select "All DTCs". Press "Clear All Stored DTCs" if there are any DTCs shown on the list.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
FAILURE CODE:
Disclaimer:
This bulletin is supplied as technical information only and is not an authorization for repair.