Power Steering Control Module Programming and Setup (Electronic Power Steering)

Power Steering Control Module Programming and Setup (Electronic Power Steering)

Note:

* DO NOT program a control module unless directed to by a service procedure or a service bulletin. If the ECU is not properly configured with the correct calibration software, the ECU will not control all of the vehicle features properly.

* Ensure the programming tool is equipped with the latest software and is securely connected to the data link connector. If there is an interruption during programming, programming failure or ECU damage may occur.

* Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will interrupt programming. Install the EL-49642 - SPS programming support tool to maintain system voltage. If not available, connect a fully charged 12 V jumper or booster pack disconnected from the AC voltage supply. DO NOT connect a battery charger.

* Turn OFF or disable systems that may put a load on the vehicles battery such as; interior lights, exterior lights (including daytime running lights), HVAC, radio, etc.

* During the programming procedure, follow the SPS prompts for the correct ignition switch position.

* Clear DTCs after programming is complete. Clearing powertrain DTCs will set the Inspection/Maintenance (I/M) system status indicators to NO.

Diagnostic Aids

The following service procedures require either a programming or a setup event performed for a complete repair.

The electronic power steering control module is part of the power steering assist motor assembly and is electronically paired with the steering gear's sensors.

Replace and Program ECU

To program a replacement or an existing ECU, perform the following procedure:

Note: During the procedures listed below, critical data is retrieved from vehicle components and stored in the scan tool computer's hard drive. This data is needed during the programming and setup sequences.

Ensure the same scan tool is used and capable of reading, storing, and writing the vehicle's system data.

1. Install EL-49642 - SPS programming support tool.

2. On the SPS Supported Controllers screen, select Electronic Power Steering Control Module - Prepare Control Module for Removal and follow the on-screen instructions.

Note: Step 3 copies the worm gear wear counter data from the power steering control module PRIOR to the module's removal and stores it on the scan tool computer's hard drive.

AFTER completing step 3, the power steering control module can now be removed and replaced.

3. Replace the Power Steering Assist Motor containing the Power Steering Control Module. Refer to Power Steering Assist Motor Replacement Service and Repair

Note: The next two steps will transfer the vehicle's critical data, including the worm gear wear counter data saved in step 2, back to the vehicle components.

4. On the SPS Supported Controllers screen, select Electronic Power Steering Control Module - Programming and follow the on-screen instructions.

5. On the SPS Supported Controllers screen, select Electronic Power Steering Control Module - Configuration and follow the on-screen instructions.

6. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down.

7. Ignition ON.

8. On the SPS Supported Controllers screen, select Electronic Power Steering Control Module - Setup and follow the on-screen instructions.

9. Perform the Steering Angle Sensor Centering and Software Endstop Learning procedure.
Refer to Power Steering Control Module Calibration Power Steering Control Module Calibration

10. Clear all DTCs after completing the programming and setup procedures.

Reprogram Power Steering Control Module

If the complete steering gear INCLUDING the assist motor assembly was replaced, or for reprogramming of an existing power steering system WITHOUT replacement, perform the following procedure.

1. Install EL-49642 - SPS programming support tool.

2. Access the Service Programming System (SPS) and follow the on-screen instructions.

3. On the SPS Supported Controllers screen, select Electronic Power Steering Control Module - Programming and follow the on-screen instructions.

4. On the SPS Supported Controllers screen, select Electronic Power Steering Control Module - Setup and follow the on-screen instructions.

5. Perform the Steering Angle Sensor Centering and Software Endstop Learning procedure.
Refer to Power Steering Control Module Calibration Power Steering Control Module Calibration

6. Clear all DTCs after completing the programming and setup procedures.

Unsuccessful Programming Recovery

In the event of an interrupted or unsuccessful programming event, perform the following steps:

1. DO NOT turn the ignition OFF. Ensure that all ECU, DLC and programming tool connections are secure and the TIS terminal operating software is up to date.

2. Attempt to reprogram the ECU.

3. If the ECU can still not be programmed, turn the ignition OFF for at least one minute.

4. Turn the ignition ON and attempt to reprogram the ECU. The ECU should program. => If the ECU still cannot be programmed, replace the ECU.