Engine Controls - A/T Shift Hesitation on WOT Throttle
NUMBER: 18-031-05GROUP: Vehicle Performance
DATE: July 21, 2005
THE StarSCAN FLASH FILES FOR THIS BULLETIN ARE AVAILABLE VIA THE INTERNET. THE FLASH FILE WILL BE AVAILABLE ON THE NEXT StarSCAN(R) UPDATE CD RECEIVED AFTER CD 6.02.
SUBJECT:
Flash: Shift Hesitation During Wide Open Throttle
NOTE:
THE StarSCAN must be operating at version 6.01 or higher when the module is reprogrammed.
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Transmission Control Module (TCM) with new software.
MODELS:
2005 - 2006 (LX) Chrysler 300, Magnum, Charger SRT-8
NOTE:
This bulletin applies to vehicles equipped with a 6.1 L engine (sales code ESF) and a NAG1 automatic transmission (sales code DGJ) built on or before July 25, 2005 (MDH 0725XX).
DISCUSSION:
Randomly during a wide open throttle condition the engine RPM goes beyond the fuel cutoff point before the 1-2 upshift is made. This causes a short hard bump at the beginning of the shift. It is more likely to occur if the vehicle is traveling around 15 MPH and then the throttle is pushed to wide open (WOT).
This condition is caused by the TCM not being able to calculate the correct engine speed at which to initiate the shift.
NOTE:
There are two methods to download flash files to StarSCAN. The first method (NEW) is to download the flash files to the StarSCAN from the internet. The second method is to download the flash files from the StarSCAN Software Update CD.
PARTS REQUIRED
SPECIAL TOOLS/EQUIPMENT REQUIRED
REPAIR PROCEDURE - USING THE INTERNET TO RETRIEVE THE FLASH FILE:
NOTE:
The StarSCAN(R) must be at version 5.02 or higher before the "Using The Internet To Retrieve The Flash File" repair procedure can be performed.
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(R) for your dealership's network. For instruction on setting up your StarSCAN(R) for the dealer's network; refer to the StarSCAN(R) Quick Start Networking Guide available on the www.dcctools.com website under the "download center".
NOTE:
Make sure the StarSCAN(R) is configured to the dealership's network before proceeding.
NOTE:
If this flash process is interrupted/aborted, the flash should be restarted.
1. Open the hood, look to see if there is a "Authorized Modification Label" p/n 04275086AB near the VECI label that indicates service bulletin 18-031-05 has been performed. If service bulletin 18-031-05 HAS NOT been performed continued to the next step. If service bulletin 18-031-05 has been performed no further action is required.
2. Install a battery charger and verify that the charging rate provides approximately 13.5 volts.
3. Connect the CH9410 StarSCAN(R) ethernet cable to the StarSCAN(R) and the dealer's network drop.
4. Connect the CH9404 StarSCAN(R) vehicle cable to the StarSCAN(R) and the vehicle.
5. Power ON the StarSCAN(R).
6. Retrieve the old ECU part number. Using the StarSCAN(R) at the "Home screen:
a. Select "ECU View"
b. Touch the screen to highlight the appropriate ECU in the list of modules.
c. Record the "Part Number", displayed on the "ECU Overview" screen, for later reference.
7. Download the flash file from the internet to the StarSCAN(R). Using the StarSCAN(R) at the "ECU Overview" screen:
a. Select "More Options"
b. Select "ECU Flash".
c. Select "Browse for New File". Follow the on screen instructions.
d. Select "Download to Scantool".
e. Select "Close" after the download is complete, then select "Back".
f. Highlight the listed calibration.
g. Select "Update Controller".
h. When the update is complete, select "OK".
NOTE:
Due to the ECU programming procedure, a DTC may be set in other modules (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.
NOTE:
The following step is required by law when reprogramming a PCM and/or TCM.
8. Type the necessary information on the "Authorized Modification Label" p/n 04275086AB and attach near the VECI label (Fig. 1).
REPAIR PROCEDURE - USING SOFTWARE UPDATE CD TO RETRIEVE THE FLASH FILE:
NOTE:
Before flashing this module, make sure the StarSCAN(R) is operating at 6.01 or later.
NOTE:
If this flash process is interrupted/aborted, the flash should be restarted.
NOTE:
For detailed information on the operation of the StarSCAN(R), refer to the Quick Reference documentation provided in the StarSCAN(R) documentation kit. In addition, more recent information may also be available at the www.dcctools.com website. Look under "Training Aids" and also under "Download Center> Frequently Asked Questions" for more help.
1. Open the hood, look to see if there is a "Authorized Modification Label" p/n 04275086AB near the VECI label that indicates service bulletin 18-031-05 has been performed. If service bulletin 18-031-05 HAS NOT been performed continued to the next step. If service bulletin 18-031-05 has been performed no further action is required.
2. Install a battery charger and verify that the charging rate provides approximately 13.5 volts.
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 part number. Using the StarSCAN(R) at the "Home" screen:
a. Select "ECU View"
b. Touch the screen to highlight the appropriate ECU in the list of modules.
c. Record the "Part Number", displayed on the "ECU Overview" screen, for later reference.
6. Insert the StarSCAN(R) Software Update CD into the TechCONNECT or equivalent PC. The StarSCAN(R) Software Update CD will start automatically.
a. Select "Download Controller Flash".
b. Follow the on screen instructions.
7. At the "Select the method for looking up controller flash updates." screen:
a. If the old "Part Number" was recorded in Step # 5, proceed to Step # 8.
b. If the old "Part Number" is not known, proceed to Step # 9.
8. Select "Enter part number".
a. Follow the on screen instructions. Enter the "Part Number" recorded in Step # 5 when prompted to do so.
b. When completed, proceed to Step # 10.
9. Select "Enter YME Information".
a. Follow the on screen instructions. Select "Next" after each step. Select "Finish" after completing the last step.
b. When completed, proceed to Step # 10.
10. Using the mouse highlight the appropriate 'Calibration".
a. Follow the on screen instructions.
11. With the StarSCAN(R) powered OFF, connect the USB Key and Gender Changer to the StarSCAN(R) USB port (Fig. 2).
12. Connect the StarSCAN(R) to the vehicle (if not already connected).
13. Power ON the StarSCAN(R).
14. Reprogram the ECU by downloading the file from the USB key to the StarSCAN(R). Using the StarSCAN(R) at the "Home" screen:
a. Select "Flash Download".
b. Select "Use USB device" and follow the on screen instructions.
c. At the "Flash File List" screen, highlight the appropriate ECU "Calibration".
d. Select "Download to Scantool".
e. Select "Close" after the download is complete, then select "Back".
f. Highlight the listed calibration.
g. Select "Update Controller".
h. When the update is complete, select "OK".
NOTE:
Due to the ECU programming procedure, a DTC may be set in other modules (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.
NOTE:
The following step is required by law when reprogramming a PCM and/or TCM.
15. 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.