Electronic Power Steering System Software Update/Repair (Service Campaign 931) (SC 931)

ELECTRONIC POWER STEERING SYSTEM SOFTWARE UPDATE/REPAIR (SERVICE CAMPAIGN 931)

TECHNICAL SERVICE BULLETIN

REVISION HISTORY

This TSB supersedes TSB# 15-01-019 to update part numbers and ROM ID information.

DESCRIPTION

The affected vehicles are equipped with electronic power steering (EPS). If the EPS electronic control unit senses a discrepancy in the system's circuitry, the EPS warning indicator lamp is illuminated in the instrument cluster and steering assist is no longer provided. Steering control can be maintained; however, the vehicle will revert to a manual steering mode requiring greater driver effort, particularly at low speeds.

This bulletin describes the service procedures to 1) update the software in the EPS control module, or 2) if necessary, replace the electronic power steering (EPS) unit.

Applicable Vehicles: 

• 2007 - 2008 and 2010 model year Elantra (HD) sedan vehicles produced beginning on July 13, 2006 through May 31, 2008 and May 1, 2010 through November 11, 2010. 
• 2010 - 2012 model year Elantra Touring (FD) vehicles produced beginning on May 1, 2010 through May 7, 2012. 

PARTS INFORMATION

Part Name	Model	Previous	New	Type	Remark
EPS	HD	56300-2H200 56310-2H200 56310-2H200AS	56310-2H200QQH	Tilt	SAS equipped
		56300-2H300 56310-2H300 56310-2H300AS	56310-2H300QQH	Tilt + Tele
		56300-2H201 56300-2H250 56310-2H201 56310-2H250	56310-2H250QQH	Tilt	Non SAS
		56300-2H301 56300-2H350 56310-2H301 56310-2H350	56310-2H350QQH	Tilt + Tele
	FD	56300-2L000 56310-2L000	56310-2L000QQH	Tilt	-
		56300-2L300 56310-2L300	56310-2L300QQH	Tilt + Tele	-
BOLT	HD/FD	81919-31000		Must use new bolts during IGN key cylinder reinstallation. Order two bolts per EPS replacement.

WARRANTY INFORMATION

Model	Op Code	Operation	Part Number	Op Time
HD/FD	50C019R0	EPS S/W check and ECU upgrade	-	0.3 M/H
HD	50C019R2	EPS S/W check and replacement - SAS equipped	56310-2H200QQH 56310-2H300QQH	1.6 M/H
HD	50C019R3	EPS S/W check and replacement - Non SAS	56310-2H250QQH 56310-2H350QQH	1.6 M/H
FD	50C019R4	EPS S/W check and replacement	56310-2L000QQH 56310-2L300QQH	1.6 M/H

SERVICE PROCEDURE

Perform the service procedure based on the flow chart below.

*EPS Initial Setting includes:

• EPS Type recognition
• ASP (Absolute Steering Position) calibration

EPS S/W VERSION CHECK (WITH GDS)

1. Connect the PC-based  GDS to the vehicle and then turn 'ON' the ignition switch.
   NOTE: This service procedure can only be performed using the PC-based GDS.

   • Update the GDS prior to performing this TSB.
   • Refer to TSB 15-GI-002  for the PC-based GDS ECU update procedures.
2. Input the vehicle information by entering the vehicle's VIN or selecting the vehicle model, model year, engine/fuel type and EPS as the system and then click 'OK'.
3. Select ECU Upgrade  on the initial screen.
4. Select Auto Mode,  click 'Next', and then select the EPS  system.
5. Read the 'Preparation' statement on the screen and then click 'OK'.

   The GDS will read the vehicle's EPS ROM ID.

6. After the current ROM ID is displayed, select the upgrade event according to the vehicle model.
   • 359.HD EPS MODULE LOGIC IMPROVEMENT
   • 360.FD EPS MODULE LOGIC IMPROVEMENT

   Click 'Next'.

7. Read the message on the GDS screen and then proceed to update the EPS S/W or replace the EPS unit.

   Message to update the EPS S/W. Proceed to the EPS S/W Update procedure section on page 7 of this TSB.

   Message to replace the EPS unit. Proceed to the EPS Replacement procedure section on page 11 of this TSB.

EPS S/W UPDATE PROCEDURE

AUTO MODE UPDATE PROCEDURE USING PC-BASED GDS

1. Perform the update procedure when the GDS displays the message to the right.

   Click 'OK'.

2. Write down the current ROM ID in case the Auto Mode fails. 

   Click 'OK'.

   The update will begin and the progress bar will appear. It will take approximately 5 to 10 minutes to complete the upgrade procedure.

3. After the progress bar reaches 100%, the GDS will instruct to turn the ignition OFF for 10 seconds and then turn it back to the ON position.

   Then click 'OK'.

4. Click 'OK' after the "ECU Upgrade is successfully finished" screen appears.

   Check and clear any diagnostic trouble codes (DTC) that were created during the update.

5. Refer to the applicable workshop manual to perform the 'EPS Initial Setting'.
   NOTE: EPS Initial Setting includes:

   • EPS Type recognition
   • ASP (Absolute Steering Position) calibration
6. Start the vehicle to confirm proper operation of the steering system.

MANUAL MODE UPDATE PROCEDURE USING PC-BASED GDS

1. If the Auto Mode fails,
   • Turn the ignition key OFF for about 10 seconds, then turn it back to the ON position. 
   • Select Manual Mode within the ECU Upgrade screen.
2. Reference the ROM ID that was noted in the Auto Update procedure above and select the applicable HD or FD EPS - ROM ID in the menu.

   Click 'Upgrade'.

   If the ROM ID was not noted, reference the ROM ID printed on the EPS control module label.

3. Refer to the Manual Mode Password Information Table on page 11.

   Enter the password for the particular ROM ID.

   Click 'OK'.

   Click 'OK' after the voltage check if the results indicate that it is ok.

4. The update will begin and will be completed after the progress bar reaches 100%.

   Continue to follow the instructions on the screens to complete the process.

   Click 'OK' after the update successfully finished.

5. Check and clear any diagnostic trouble codes (DTC) that were created during the update.
6. Refer to the applicable workshop manual to perform the 'EPS Initial Setting'.
7. Start the vehicle to confirm proper operation of the steering system.

MANUAL MODE PASSWORD INFORMATION TABLE

#359 Elantra (HD) 

Menu	Password
HD EPS - ROM ID: HEA0609/4HEB0609/4HEC0612/4HED0706/4HDASC08/4HDASF08	8408
HD EPS - ROM ID: 4HDA0801/4HDB0803/4HDC0807/4HDD0811/4HDASA08/4HDASD08	8409
HD EPS - ROM ID: 4HDE0906/4HDF0910/4HDASB08/4HDASE08/4HDG1007	8410
HD EPS - ROM ID: 4HKA0906/4HKB0910/4HKC1007/4HKD1401	1401
HD EPS - ROM ID: 4CJ06778/4CL07992/4CM06788/4CN06744	6744
HD EPS - ROM ID: 4HDAS011	4011

#360 Elantra Touring (FD) 

Menu	Password
FD EPS - ROM ID: 4FDF0705/4FDG0706/4FDH0707/4FDI0711/4FDJ0711/4FDD0701/4FDE0703	0711
FD EPS - ROM ID: 4FDK0803/4FDL0805/4FDM0808/4FDN0808/4FDO0810	0810
FD EPS - ROM ID: 4FDP0901/4FDQ0902/4FDR0904/4FDAS103/4FDAS403	4403
FD EPS - ROM ID: 4FDS0906/4FDT0907/4FDU0910/4FDV1007/4FDW1403	1403

EPS UNIT REPLACEMENT

Replace the EPS unit only if the GDS displays the message on the right during the EPS S/W Version Check.

The procedure below is based on the Elantra (HD). The Elantra Touring (FD) is similar.

Information can also be found in the applicable service manual.

1. Align the steering wheel to the center position.
2. Write down the customer's preset radio stations.

   Remove the ground strap from the negative (-) battery terminal.

   WARNING: Disconnect the negative battery cable and wait 5 minutes prior to any Supplemental Restraint System (SRS) repairs.
3. Remove the crash pad side cover (A).
4. Remove the lower crash pad mounting screws (B).
5. Disconnect any connectors (C) and then remove the lower crash pad.
6. Remove the bracket (D) by loosening the mounting bolts.

   Tightening torque: 

   3.9 ~ 5.8 Nm (0.4 ~ 0.6 kgf.m, 2.8 ~ 4.3 lb-ft)

7. Draw a line between the steering column U-joint and the splines of the steering rack gear box with a paint marker.

   Use these lines to align the U-joint and steering rack during reinstallation.

   Remove the lower pinch bolt (E) and then separate the U-joint from the steering rack.

   Tightening torque: 

   32.4 ~ 37.3 Nm (3.3 ~ 3.8 kgf.m, 23.9 ~ 27.5 lb-ft)

   NOTE: If you do not reinstall the steering column U-joint and the steering rack in the same orientation as removal, a wheel alignment should be performed.
8. Remove the screws to remove the air duct (F).
9. Loosen the driver airbag mounting bolt (G) on both sides of the steering wheel.

   Tightening torque: 

   7.9 ~ 10.8 Nm (0.8 ~ 1.1 kgf.m, 5.8 ~ 8.0 lb.ft)

10. Carefully disconnect any connectors (H) on the back of the airbag and then remove the driver's airbag.
    NOTE: Ensure the locking tab (H) is released prior to separating the connector. Do not pull on the wires to disconnect the harness from the airbag.
    Be EXTREMELY careful when removing the locking tab. If the locking tab breaks, the airbag harness will need to be replaced.
11. Disconnect the connector (I).
12. Loosen the steering wheel mounting nut (J).

    Tightening torque: 

    39.2 ~ 49.0 Nm (4.0 ~ 5.0 kgf.m, 28.9 ~ 36.1 lb-ft)

13. Remove steering wheel (K).
14. Remove the column shroud cover mounting screws (L).
15. Remove the lower column shroud cover (M).
16. Disconnect the clock spring connectors (N).
17. Remove the clock spring (O) by releasing the tabs.
18. Remove both multi-function switches (P) by pressing on the tabs (Q) to unlock from the column.
19. Disconnect all connectors (R) and harness clips from the EPS and ignition key cylinder.
20. Remove the EPS mounting nuts (S).

    Tightening torque: 

    12.7 ~ 17.6 Nm (1.3 ~ 1.8 kgf.m, 9.4 ~ 13.0 lb-ft)

    Then carefully remove the EPS unit from the vehicle.

21. Separate the U-joint from the EPS by loosening the pinch bolt (T).
    NOTE: Note the orientation of the U-joint assembled to the old EPS. The U-joint should be assembled to the new EPS in the same orientation.

    Install the U-joint to the new EPS.

    Tightening torque: 

    29.4 ~ 34.3 Nm (3.0 ~ 3.5 kgf.m, 21.6 ~25.3 lb-ft)

22. Use a hammer and cold chisel or angle grinder to notch the bolt heads (U) that secure the ignition key cylinder to the EPS. Then use a screwdriver to loosen and remove the bolts.

    Discard the bolts.

    CAUTION: Wear protective goggles when using a cold chisel or angle grinder to perform this procedure.
23. Install the removed ignition key cylinder to the new EPS. Torque down the new ignition cylinder bolts until the bolt head breaks off.
    NOTE: New ignition cylinder bolts P/N: 81919-31000, must be used.
    Order two bolts per EPS replacement.
    NOTE: Align the ignition cylinder and bracket along the centerline (V) of the steering column. If the ignition cylinder is not orientated properly, the lower column shroud cover cannot be installed.
24. Reinstall parts in the reverse order of removal.
25. Reconnect the battery.

    Check and clear any diagnostic trouble codes (DTC) that might have been created.

26. Perform the 'EPS Initial Setting' referring to the applicable workshop manual.
    NOTE: EPS Initial Setting includes:

    • EPS Type recognition
    • ASP (Absolute Steering Position) calibration
27. Start the vehicle to confirm proper operation of the steering system.
28. Reset the customer's radio stations.

TROUBLESHOOTING INFORMATION

Below is a troubleshooting guide if there are issues during the EPS upgrade procedure. For additional information call Hyundai Motor America's Techline at 1-800-325-6604.

Issue	Description	Solution
GDS Version	PC-based GDS and VCI version	Confirm the PC-based GDS version is 1.18.04 or higher. Confirm the VCI version is 2.16 or higher.
Update Fails	After Auto or manual update, a ROM ID "4AA---" or "4CX---" appears.	Confirm the PC-based GDS version is 1.18.04 or higher and the VCI version is 2.16 or higher. Turn the ignition key OFF for about 10 seconds, then turn it back to the ON position. Retry manual mode update using the original ROM ID which was noted during the auto mode update. The original ROM ID is also printed on the EPS control module label.
	Auto or manual mode update fails before reaching 100%.	Confirm the PC-based GDS version is 1.18.04 or higher and the VCI version is 2.16 or higher. Turn the ignition key OFF for about 10 seconds, then turn it back to the ON position. Retry manual mode update using the original ROM ID which was noted during the auto mode update. The original ROM ID is also printed on the EPS control module label.
DTC After Update	DTCs reappear after clearing codes after the EPS update.	Repair DTCs referring to the applicable shop manual.
EPS Light After Update	The EPS light is flashing.	The steering angle sensor (SAS) is not calibrated and the steering is not indexed. Slowly rotate the steering wheel to the left and right 180 degrees. After the steering is indexed, the EPS light will stop flashing and remain ON. Center the steering wheel. Perform the 'EPS Initial Setting' referring to the applicable workshop manual.
	The EPS light is ON.	Perform the 'EPS Initial Setting' referring to the applicable workshop manual.