Engine Controls/Charging System- Erratic Idle With A/C On

GROUP
Engine

NUMBER
126 [Rev 1, 12/11/12]

MODEL
Sorento (XM) 2.4L GDI 2013MY

DATE
November 2012

SUBJECT:
ALTERNATOR PULLEY AND TENSIONER REPLACEMENT

*NOTICE

This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by asterisks.*





This bulletin provides information related to the ECM software upgrade and alternator pulley replacement for some 2013MY Sorento vehicles, produced from February 16, 2012 to September 13, 2012, to improve idle RPM stability (750 to 680) while at a stop with A/C ON. It is important to note that the 2.4L GDI engine has a certain level of harmonic vibration while at low idle RPM which is a normal characteristic of this engine design. For confirmation that the latest reflash has been performed to a vehicle you are working on, verify ROM ID using the tables in this TSB.

Service Procedure:

1. Disconnect and isolate the negative terminal from the battery.





2. Inspect the alternator pulley to confirm the specific type of pulley installed on the vehicle. If the vehicle is equipped with the Original Alternator Dampening Pulley (OAD) (see identification chart below), perform the procedure outlined in this TSB.





3. Remove the alternator (A) from the vehicle. Refer to the following section on KGIS for removal information:

SORENTO(XM) > 2013 > G 2.4 GDI > Engine Electrical System > Charging System > Alternator> Repair Procedures





4. Secure the alternator in a shop vise as shown in the image.





5. Puncture the center of the alternator pulley dust cover with a pocket screwdriver or pick tool.





6. Using a flat bladed screwdriver, remove the dust cover from the pulley.





7. Use the Alternator Pulley Removal/Installer Kit (P/N 09373-27000), to remove the OAD alternator pulley by inserting the removal tool (A) into the pulley splines, as shown.





8. Insert the 1-50 Torx(R) socket (B) through the pulley removal tool (A) and into the alternator shaft.





9. Use a wrench to hold the pulley removal / installation tool and rotate the Torx(R) socket clockwise to loosen the pulley.





10. Remove the pulley from the alternator.

NOTE:

Make sure the shaft is clean and free of debris before proceeding.





11. Install new OAP pulley onto the alternator shaft by hand. Using a wrench, pulley removal/installation tool and Torx(R) socket, secure the OAP pulley to the shaft by turning the socket counter-clockwise.

Torque pulley to the specification below:

Tightening torque: 50 lb-ft (67Nm)

12. Make sure the alternator pulley spins freely before proceeding.





13. Install new dust cover onto pulley.





14. Remove the drive belt tensioner by removing the pulley bolt and mounting bolt.

Note:

The pulley bolt is left-hand thread.

15. Install new parts by reversing the removal process. Torque the components to the specification below:

^ Tensioner Mounting Bolt (M12)
39.7~47 lb-ft (53.9~63.7 Nm)

^ Tensioner Pulley Bolt (M12)
39.7~47 lb-ft (53.9~63.7 Nm)

16. Re-install the alternator by reversing the removal procedure.

Tightening torque:

Alternator M8 mounting bolt
19.5~24.6 lb-ft (26.5~33.3 Nm)





17. Re-install the serpentine belt.





ECM Upgrade Procedure:

To correct this condition, the ECM should be reprogrammed using the GDS download as described in this bulletin.

NOTICE

^ A fully charged battery is necessary before ECM upgrade can take place It is recommended that the Midtronics GR81299 system be used in ECM mode during charging DO NOT connect any other battery charger to the vehicle during ECM upgrade.

^ All ECM 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 ECM upgrade procedure.

^ DO NOT start the engine during ECM upgrade.

^ DO NOT turn the ignition key 'OFF' or interrupt the power supply during ECM upgrade.

^ When the ECM upgrade is completed, turn the ignition 'OFF' and wait 20 seconds before starting the engine.

ONLY use approved ECM upgrade software designated for the correct model, year.





ROM ID Information Table:
Upgrade event # 194

1. Connect the power supply cable to the GDS tool.

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 1 6-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 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: Upgrade event #194:

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 may be set during reprogramming.

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





AFFECTED VEHICLE PRODUCTION RANGE:





REQUIRED PART:





REQUIRED SST:





WARRANTY CLAIM INFORMATION:

*Note:

If ONLY the ECM Upgrade Procedure is performed, submit claim using Op Code 39110R00 for 0.3 Op Time (This Op Code & Time only applies to vehicles in the production date range of this TSB and that had a new alternator with OAP installed during a previous repair).*