Engine, A/T Controls - Torque Converter Clutch Shudder
NUMBER: 21-017-07GROUP: Transmission
DATE: October 26, 2007
THE StarSCAN(R) FLASH FILES FOR THIS BULLETIN ARE AVAILABLE VIA THE INTERNET.
StarSCAN(R) SOFTWARE LEVEL MUST BE AT RELEASE 8.03 OR HIGHER FOR THIS BULLETIN.
SUBJECT:
FLASH: Torque Converter Shudder On NC Engagement/Disengagement Or Torque
Converter Shudder When Switching From Unlock To Partial Or Full Lock
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software and enable transmission quick learn with StarSCAN(R).
MODELS:
2008 (KA) Nitro
2008 (KK) Liberty
NOTE:
This bulletin applies to vehicles equipped with a 3.7L engine (Sales Code EKG) built before October 23, 2007 (MDH 1023XX) for both the U.S. and International Models.
SYMPTOM/CONDITION:
Torque converter shudder on NC engagement and disengagement or torque converter shudder on torque converter pull-ins. Pull-ins are when the torque converter goes from unlock to partial or full lock condition.
DIAGNOSIS:
Using a StarSCAN(R) with the appropriate Diagnostic Procedures available in TechCONNECT, verify all transmission Systems are functioning as designed. If the vehicle operator describes the Symptom/Conditions and they can be verified, perform the appropriate Repair Procedure.
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(R) must be programmed with software release level 8.03 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, 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 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. Turn the ignition switch to the run position.
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 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 update is complete, select "OK".
l. Verify the part number has updated to the new part number.
7. Using the StarSCAN(R) clear any PCM DTC's before performing quick learn.
8. Enable Transmission quick learn with StarSCAN(R).
a. Using the StarSCAN(R) at the "Home" screen, select "ECU View".
b. Highlight "PCM
c. Select "Misc Functions".
d. Highlight quick learn and press "Start".
e. Follow the on screen instructions.
9. Using the StarSCAN(R) clear any PCM DTC's after performing quick learn.
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.
10. 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.