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Chevrolet Sonic Repair Manual: K20 Engine Control Module: Programming and Setup

Chevrolet Sonic Repair Manual / Powertrain / Internal Combustion Powertrain Control / Engine Control / Engine Control Module / K20 Engine Control Module: Programming and Setup

Special Tools

EL-49642 SPS Programming Support Tool

For equivalent regional tools, refer to Special Tools.

Note:

  • DO NOT program a control module unless directed to by a service procedure or a service bulletin. If the control module is not properly configured with the correct calibration software, the control module 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 control module damage may occur.
  • Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will interrupt programming. When required 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.
  • Note the engine oil life remaining percentage.
Replace and Program Control Module

To program a replacement K20 Engine Control Module (ECM), 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. Before removing the old control module, perform the SPS function Prepare Control Module for Removal, if available.

    Note:

    The Prepare Control Module for Removal function can only be performed when communication with the old control module is still possible.

  4. Replace the ECM.
  5. Perform the SPS function K20 Engine Control Module - Programming and follow the on-screen instructions.
  6. Clear the DTCs after completing the Programming procedure.
  7. Perform the SPS function Immobilizer Learn and follow the on-screen instructions. Refer to Immobilizer System Component Programming.
  8. Perform the SPS function K20 Engine Control Module - Configuration & Setup and follow the on-screen instructions.
  9. Clear DTCs after completing the Configuration & Setup procedure.
Reprogram Control Module

To reprogram an existing K20 Engine Control Module, 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. Clear DTCs after completing the Programming procedure.
  4. Perform the SPS Function Immobilizer Learn and follow the on-screen instructions. Refer to Immobilizer System Component Programming.
  5. Perform the SPS function Engine Control Module - Configuration & Setup and follow the on-screen instructions, if available.
  6. Clear DTCs after completing the Configuration & Setup procedure.
Unsuccessful Programming Recovery

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

  1. Ignition ON. Ensure the control module, DLC, and programming tool connections are secure and the SPS software is up to date.
  2. Verify the control module can be reprogrammed.
  • If the control module cannot be reprogrammed
  1. Ignition OFF for one minute, ignition ON.
  2. Verify the control module can be reprogrammed.
  • If the control module cannot be reprogrammed, replace the K20 Engine Control Module.
  • If the control module can be reprogrammed
  • All OK.
    • Repair Instructions

    Perform the Diagnostic Repair Verification after completing the repair.

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