Engine, A/T Controls - Harsh 1-2/2-1 Shifts/Shift Bump
NUMBER: 21-008-08GROUP: Transmission
DATE: February 8, 2008
THE StarSCAN(R) FLASH FILES FOR THIS BULLETIN MUST BE RETRIEVED FROM THE INTERNET.
StarSCAN(R) SOFTWARE LEVEL MUST BE AT RELEASE 8.04 OR HIGHER.
StarMOBILE(R) DESKTOP CLIENT MAY ALSO BE USED TO PERFORM THIS PROCEDURE.
SUBJECT:
Flash: Shift Quality Improvements for Upshift/Downshift
OVERVIEW:
This bulletin involves reprogramming the Powertrain Control Module (PCM) with new software.
MODELS:
2006 - 2008 (PT) PT Cruiser
NOTE:
This bulletin applies to 2006 - 2008 models equipped with a 2.4L Naturally Aspirated (Sales Code EDZ) and 2008 Model 2.4L Turbo engine (Sales Code EDT) and 41TE automatic transmission (Sale code DFF) built prior to February 5, 2008 (MDH0205XX).
SYMPTOM/CONDITION:
The vehicle operator may experience one or more of the following symptoms:
1. 4 - 3 Coastdown downshift bump, may feel like 2 - 1 to customer. ALL Model Years, NA Engines only.
2. 1-2 Upshift harshness. 2007 & 2008 Model Years only.
3. 2 - 1 Downshift harshness. 2007 & 2008 Model Years only.
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 they can be verified, perform the Repair Procedure.
PARTS REQUIRED:
SPECIAL TOOLS / EQUIPMENT REQUIRED:
REPAIR PROCEDURE - USING THE INTERNET TO RETRIEVE THE FLASH FILE:
NOTE:
When performing this Repair Procedure, the software release level in the StarSCAN(R); must be programmed with 8.04 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(R) and StarMOBILE(R) 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 CH9404D StarSCAN(R) vehicle cable to the StarSCAN(R) and the vehicle.
4. Power ON the StarSCAN(R).
5. Turn the ignition switch on.
6. 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.
7. Perform the Quick Learn function, found in the StarSCAN(R) Misc Function Menu.
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.
8. 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.