Chevrolet Equinox Service Manual: Rear Differential Clutch Control Module Programming and Setup Differentials Rear Diff

Special Tools

EL-49642 SPS Programming Support Tool

For equivalent regional tools, refer toSpecial Tools.

Note:

DO NOT program a control module unless directed to by a service procedure or a servicebulletin. 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 connectedto the data link connector. If there is an interruption during programming, programmingfailure or ECU damage may occur.Stable battery voltage is critical during programming. Any fluctuation, spiking, overvoltage or loss of voltage will interrupt programming. Install the EL-49642 SPS programming support toolto maintain system voltage. If not available, connect a fully charged 12-V jumperor booster pack disconnected from the AC voltage supply. DO NOT connect a batterycharger.Turn OFF or disable systems that may put a load on the vehicles battery such as; interiorlights, exterior lights (including daytime running lights), HVAC, radio, etc.During the programming procedure, follow the SPS prompts for the correct ignitionswitch position.Clear DTCs after programming is complete. Clearing powertrain DTCs will set the Inspection/Maintenance(I/M) system status indicators to NO.Replace and Program ECU or Reprogram ECU

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

Install EL-49642 SPS programming support tool.Access the Service Programming System (SPS) and follow the on-screen instructions.On the SPS Supported Controllers screen, select RDCM Rear Differential Clutch ControlModule- Programming and follow the on-screen instructions.On the SPS Supported Controllers screen, select RDCM Rear Differential Clutch ControlModule- Setup and follow the on-screen instructions.At the end of programming, choose the“Clear All DTCs” function on the SPS screen.Unsuccessful Programming Recovery

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

DO NOT turn the ignition OFF. Ensure that all ECU, DLC and programming tool connectionsare secure and the TIS terminal operating software is up to date.Attempt to reprogram the ECU.If the ECU can still not be programmed, turn the ignition OFF for at least one minute.Turn the ignition ON and attempt to reprogram the ECU. The ECU should program.If the ECU still cannot be programmed, replace the ECU.