Engine Controls - DTC P0638 Throttle Actuator Control Stored

GROUP
Engine

MODEL
2011/12MY
Sorento (XM),
Sedona (VQ)

NUMBER
116

DATE
April 2012

TECHNICAL SERVICE BULLETIN

SUBJECT:
ECM UPGRADE - XM/VQ 3.5L MIL ON WITH DTC P0638

This bulletin provides information related to the ECM software upgrade of some 2011/2012MY Sorento 3.5L vehicles produced from October 23, 2009 to February 15, 2012, and some Sedona 3.5L vehicles produced from March 3, 2010 to January 27, 2012 which may experience a Malfunction Indicator Lamp illuminated with the ECM (Electronic Control Module) system-related DTC, P0638. To correct this condition, the ECM should be reprogrammed using the GDS download as described in this bulletin. For confirmation that
the latest reflash has been done to a vehicle you are working on, verify ROM ID using the tables in this TSB.





^ P0638 Throttle Actuator Control Range/Performance (Bank 1)

*NOTICE
DO NOT replace the ETC Actuator/Throttle body as part of this repair instruction. Perform the reflash as described in this bulletin instead. Any ETC/Actuators determined to require replacement in conjunction with this TSB will be put on Mandatory Parts Return and will be tested by KMA. Unnecessarily returned parts will be subject to chargeback.

ECM Upgrade Procedure:

UPGRADE EVENT NAME
182.XM 3.5 P0638 DTC LOGIC IMPROVEMENT
183.VQ 3.5 P0638 DTC LOGIC IMPROVEMENT





ROM ID Information Table:

1. Connect the power supply cable to the GDS tool or to the diagnostic terminal with the GDS docked.

*NOTICE

If attempting to perform the ECM upgrade with the power supply cable disconnected from the GDS tool, be sure to check that the GDS tool is fully charged before ECM upgrade. If the GDS tool is not fully charged, failure to perform the ECM upgrade may occur. Therefore, it is strongly recommended that the power supply be connected to the GDS tool.

2. Connect the USB cable between the VCI and the GDS tool.

*NOTICE
When performing the ECM upgrade using the GDS tool, wireless communication 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) between the VCI and the OBD-II connector, located under the drivers 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 the VIN Auto Detect function.





6. Once back at the GDS Main Screen, select ECU Upgrade from the bottom right-hand corner. Next select Auto Mode, and then Engine. Perform the ECM upgrade in accordance with normal GDS tool ECM upgrade procedures.





MANUAL MODE ECM UPGRADE PASSWORDS:

7. When the GDS tool reports that the ECM upgrade has been successfully completed, click OK, turn OFF the ignition key, and wait at least 10 seconds before attempting to start the engine.

8. Check for Diagnostic Trouble Codes using the GDS and erase any DTCs stored such as EPS, ESC, and TPMS. Due to CAN BUS multiple DTCs maybe set during reprogramming.

9. Start the engine to confirm proper operation of the vehicle.





AFFECTED VEHICLE PRODUCTION RANGE:





WARRANTY CLAIM INFORMATION: