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Engine Control Module Programming and Setup - LNQ

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

Before Programming The Engine Control Module

Note: DO NOT program a control module unless you are directed by a service procedure or you are directed by a General Motors LLC service bulletin. Programming a control module at any other time will not permanently correct a customers concern.

Ensure the following conditions are met before programming a control module:

Vehicle system voltage

    • There is no charging system concern. All charging system concerns must be repaired before programming a control module.
    • Battery voltage is between 12-16 V. The battery must be charged before programming the control module if the battery voltage is low.
    • A battery charger is NOT connected to the vehicle battery. Incorrect system voltage or voltage fluctuations from a battery charger may cause programming error or control module damage.

Turn OFF or disable any of the following systems that may put a load on the vehicle battery:

    • Twilight sentinel
    • Interior lights
    • Daytime running lamps (DRL). Applying the parking brake, on most vehicles, disables the DRL system. Refer to the Owner's Manual.
    • HVAC systems
    • Engine cooling fans, etc.
    • The ignition switch is in the proper position. The scan tool prompts you to turn ON the ignition, with the engine OFF. DO NOT change the position of the ignition switch during the programming procedure, unless instructed to DO so.

All of the following tool connections are secure:

    • The connection at the data link connector (DLC)
    • The voltage supply circuits

DO NOT disturb the tool harnesses while programming. If an interruption occurs during the programming procedure, programming error or control module damage may occur.

ECM Replacement

If the engine control module (ECM) needs to be replaced, the following procedures must be performed:

  1. Connect a scan tool to the vehicle and access SPS. Refer to Service Programming System (SPS) .

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

  2. Before removing the old control module, perform the SPS function Prepare Control Module for Removal.
  3. Replace the ECM.
  4. Perform the SPS function Engine Control Module - Programming and follow the onscreen instructions.
  5. Perform the SPS function Engine Control Module - Configuration & Setup and follow the onscreen instructions. On the screen Control Module - Configuration and Setup Function(s), select both control module Configuration/Reconfiguration and the appropriate control module Setup.
  6. Perform the SPS Function Immobilizer Learn. Refer to Immobiliser System Component Programming .
  7. Clear DTCs after completing the programming procedure.
  8. Start and idle engine.
  9. Using a scan tool, perform the Diesel Particulate Filter (DPF) Service Regeneration
  10. If the SPS function Prepare Control Module for Removal could not be performed, perform the following:

Engine Oil Life Remaining. When available, use a scan tool to reset the Engine Oil Life back to the original percentage recorded before the module was replaced.

ECM Reprogramming

If the engine control module (ECM) needs to be reprogrammed, the following procedures must be performed:

  1. Connect a scan tool to the vehicle and access SPS. Refer to Service Programming System (SPS) .
  2. Perform the SPS function Engine Control Module - Programming and follow the onscreen instructions.
  3. Engine Oil Life Remaining. When available, use a scan tool to reset the Engine Oil Life back to the original percentage recorded before the module was reprogrammed.

Setup for Component Replacement

The replacement of some components will require a setup procedure for complete repair.

If any of the following components are replaced, use a scan tool to perform the appropriate learn function.

    • Fuel Injector
    • Fuel Rail Pressure Sensor

If any of the following components are replaced, use a scan tool to perform the appropriate reset function.

    • Diesel Particulate Filter (DPF)
    • Fuel Rail Pressure Sensor
   


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