Engine, A/T Controls - Torque Converter Shudder/Bump
NUMBER: 21-004-07GROUP: Transmission
DATE: March 2, 2007
THE StarSCAN(R) FLASH FILES FOR THIS BULLETIN MUST BE RETRIEVED FROM THE INTERNET.
StarSCAN(R) SOFTWARE LEVEL MUST BE AT RELEASE 7.03 OR HIGHER.
StarMOBILE(R) STANDALONE DOES NOT SUPPORT THIS SERVICE ACTION.
SUBJECT:
Flash: Torque Converter Shudder / Bump
OVERVIEW:
This bulletin involves reprogramming the Powertrain Control Module (PCM) with new software, performing "quick learn", re-evaluating the vehicle and if necessary, replacing the torque converter.
MODELS:
2007 (JS) Sebring
2008 (JS) Avenger
NOTE:
This bulletin applies to vehicles built with a 2.4L engine and 41TE automatic transmission (Sales Codes ED3 and DFF) built before March 5, 2007 (M DH0305XX).
SYMPTOM/CONDITION:
Some customers may experience a momentary bump or shudder while driving between 48 to 65 KPH (30 to 40 MPH). This may be caused by abrupt torque converter clutch engagement when EMCC first initializes.
DIAGNOSIS:
Using a Scan Tool (StarSCAN(R)) with the appropriate Diagnostic Procedures available in TechCONNECT, verify all engine/transmission systems are functioning as designed. If DTC's are present record them on the repair order and repair as necessary before proceeding further with this bulletin.
If the vehicle operator describes the Symptom/Conditions and can be verified by driving the vehicle to initialize EMCC engagement with moderate throttle input, perform the Repair Procedure.
PARTS REQUIRED:
SPECIAL TOOLS / EQUIPMENT REQUIRED:
FLASH REPAIR PROCEDURE - USING THE INTERNET TO RETRIEVE THE FLASH FILE:
CAUTION:
DO NOT START THE ENGINE PRIOR TO COMPLETING 5n. IF THE PROCEDURE IS NOT ADHERED TO THE CONTROLLER MAY NOT COMPLETE THE PROGRAMMING PROCESS.
NOTE:
When performing this Repair Procedure, the software release level in the StarSCAN(R); must be programmed with 7.03 level software 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, to take advantage of this feature you must first configure the StarSCAN(R) for your dealership's network. Make sure the StarSCAN(R) is configured to the dealership's network before proceeding. For instruction on setting up your StarSCAN(R) 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 13.5 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.
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 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". Follow on screen instructions.
k. When the update is complete, select "OK".
l. Verify the part number at the top of the "Flash PCM" screen has updated to the new part number.
m. Turn the ignition switch to the OFF position for no less than 15 seconds.
n. Turn the ignition switch to the RUN position (DO NOT CRANK THE ENGINE) for no less than 20 seconds.
CAUTION:
DO NOT START THE ENGINE PRIOR TO COMPLETING 5n. IF THE PROCEDURE IS NOT ADHERED TO THE CONTROLLER MAY NOT COMPLETE THE PROGRAMMING PROCESS.
NOTE:
Due to the PCM 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.
6. Type the necessary information on the "Authorized Modification Label" p/n 04275086AB and attach near the VECI label (Fig. 1).
7. After flash reprogramming, Perform "Quick Learn" and test drive the vehicle to verify that the momentary bump/shudder is eliminated. Is the momentary bump/shudder felt?
a. Yes - Continue with step 8.
b. No - Return the vehicle to the customer.
8. Replace the Torque Converter with p/n 68103524AB. Follow detailed service procedures listed in DealerCONNECT > TechCONNECT for Torque Converter replacement.
NOTE:
Do NOT reset the torque converter break in strategy.
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.