Engine Controls - A/T May Default To Neutral
NUMBER: 18-035-07GROUP: Vehicle Performance
DATE: May 18, 2007
THE StarSCAN(R) FLASH FILES FOR THIS BULLETIN ARE AVAILABLE VIA THE INTERNET.
SUBJECT:
FLASH: 545RFE Transmission Defaults To Neutral
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software.
MODELS:
2007 (DR/DH/D1/DC) Ram Truck (1500/2500/3500)
2007 (HB/HG) Durango/Aspen
2007 (ND) Dakota
NOTE:
This bulletin applies to vehicles equipped with a 545RFE transmission (sale code DGQ) built on or before March 26, 2007 (MDH 0326XX).
SYMPTOM/CONDITION:
The transmission may default into neutral gear if the transmission gear selector is moved into "reverse gear range under certain operating conditions.
The default into neutral gear is done to protect the transmission mechanical components from potential damage. New PCM software will monitor transmission hydraulic pressure and allow reverse gear engagement, if the transmission is in "reverse gear range and the transmission hydraulic pressure is sufficient to support reverse gear operation.
DIAGNOSIS:
Using a 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.
If the vehicle operator describes or experiences the Symptom/Condition, perform the Repair Procedure.
PARTS REQUIRED:
SPECIAL TOOLS / EQUIPMENT REQUIRED:
REPAIR PROCEDURE - USING StarSCAN AND THE INTERNET TO RETRIEVE THE FLASH FILE:
NOTE:
Before performing this Repair Procedure, the operating software in the StarSCAN� must be programmed with software release level 7.04 SPI or higher. The software release level is visible in the blue header at the top of the StarSCAN(R) screen.
NOTE:
The StarSCAN(R) diagnostic scan tool fully supports Internet connectivity. However, in order to take advantage of this feature you must first configure the StarSCAN� for your dealership's network. For instruction on setting up your StarSCAN� for the dealer's network; refer to the StarSCAN(R) Quick Start Networking Guide available on the website under the "download center".
NOTE:
If this flash process is interrupted/aborted, the flash should be restarted.
1. Open the hood and install a battery charger. Using a voltmeter, verify that the charging rate provides 13.2 - 13.5 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.
NOTE:
Do not allow the charging voltage to climb above 13.5 volts during the flash process.
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. Retrieve the old ECU (PCM) part number. Using the StarSCAN(R) at the "Home" screen:
a. Select "ECU View"
b. Touch the screen to highlight the PCM in the list of modules.
c. Select "More Options"
d. Select "ECU Flash".
e. Record the part number at the top of the "Flash PCM" screen for later reference.
f. Select "Browse for New File". Follow the on screen instructions.
g. Select "Download to Scantool".
h. Select "Close" after the download is complete, then select "Back".
i. Highlight the listed calibration.
j. Select "Update Controller".
k. When the PCM update is complete, select "OK".
NOTE:
Due to the ECU programming procedure, a DTC may be set in other electronic modules within the vehicle. 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.
NOTE:
The following step is required by law when reprogramming a PCM or TCM.
6. Type the necessary information on the "Authorized Modification Label p/n 04275086AB and attach near the VECI label (Fig 1).
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.