A/T Controls - Bumping/Bucking On TCC Application
Model Sorento [BL]Group Automatic Transaxle(52)
Number KT2008052102
Date Tuesday, March 10, 2009
Area N. America
Subject
2007-2009MY Sorento (BL) TCM Reprogram (Trans - 021 Revised)
Description
This service bulletin provides information related to the Transmission Control Module (TCM) upgrade for 2007-2009 Sorento (BL) models. Some 2007-2009 Sorento (BL) vehicles with a 3.3L or 3.8L engine which may experience a "bumping" symptom during engagement of the damper clutch (torque converter lock-up clutch), and a "bucking" symptom when the damper clutch is fully engaged.
To correct this condition, the TCM should be reprogrammed using the GDS download as described in this bulletin.
NOTICE:
Global Diagnostic System (GDS) users should access the "Notice" function from the GDS Main Screen for instructions reguarding ECU upgrade events.
NOTICE:
^ A fully charged battery is necessary before TCM upgrade can take place. DO NOT connect a battery charger to the vehicle during TCM upgrade. Make sure the blower motor is "OFF" during TCM upgrade.
^ All TCM upgrades must be done with the ignition key in the "ON" position.
^ Be careful not to disconnect any cables connected to the vehicle or GDS during the TCM upgrade procedure.
^ DO NOT start the engine during TCM upgrade.
^ DO NOT turn the ignition key "OFF" or interrupt the power supply during TCM upgrade.
^ When the TCM upgrade is completed, turn the ignition key "OFF" and wait 20 seconds before starting the engine.
^ ONLY use approved TCM upgrade software designed for the correct model, year and engine size. Failure to do so may create other driveability issues due to the use of the incorrect TCM calibration.
ROM ID INFORMATION TABLE
Effective Vehicle Information
Service Procedure
1. Connect the power supply cable to the GDS tool.
NOTICE:
If attempting to perform the TCM upgrade with power supply cable disconnected from the GDS tool, be sure to check that the GDS tool is fully charged before TCM upgrade. If the GDS tool is not fully charged, failure to perform the TCM upgrade may occur. Therefore, it is strongly recommended that the power supply connector be connected to the GDS tool.
2. Connect the USB cable between the Vehicle Communications Interface (VCI) and the GDS tool.
NOTICE:
When performing the TCM upgrade using the GDS tool, wireless communition between the VCI and GDS tool is not available. Therefore, be sure to connect the USB cable between the VCI and the GDS tool.
3. Connect the Main 16-pin DLC cable (GHDM - 241000) to the VCI.
4. Connect the Main 16-pin DLC cable (GHDM - 241000) to the OBD-II connector, located under the driver's side of the instrument panel.
5. With the ignition key ON, turn ON the VCI and GDS tool. Access the GDS vehicle identification number (VIN) screen and configure the vehicle using manual VIN entry.
NOTICE:
Global Diagnostic System (GDS) users should access the "NOTICE" function from the GDS Main Screen for instructions reguarding ECU upgrade events.
6. At the GDS Main Screen, select ECU UPGRADE from the menu buttons located on the bottom of the screen Next, select Auto Mode, AT.
7. Perform the TCM upgrade in accordance with normal GDS tool ECU upgrade procedures.
NOTICE:
DO NOT attempt to perform a Manual Mode TCM upgrade unless Auto Mode Fails. Always follow the instructions given on the GDS tool in either Auto or Manual mode. See table for Manual Mode passwords. In addition, a TCM reset is required if Auto Mode fails; refer to the table above for procedure.
8. Follow the procedures displayed on the GDS screen to complete the ECU Upgrade process. Return to the GDS main screen when complete.
9. Check for (and clear) any Diagnostic Trouble Codes (DTCs) in the Engine, Trans, and ABS/ESC ECUs.
10. Perform the TCU SUB ROM RESET and adaptive value reset procedure in accordance with Trans/Drive TSB 017, steps 26-30.
11. Confirm proper shift points of A/T units after reprogramming to reduce customer complaints of excessive shift shock and improper shift points.
WARRANT CLAIM INFORMATION