Engine Control Module Programming and Setup (LBS/A20DTH)
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Engine Control Module Programming and Setup (LBS/A20DTH)
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The following service procedures require either a programming or a setup event performed for a complete repair.
Before Programming The Engine Control Module
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Note
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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.
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Ensure the following conditions are met before programming a control module:
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There is no charging system concern. All charging system concerns must be repaired before programming a control module.
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Battery voltage is between 12-16 V. The battery must be charged before programming the control module if the battery voltage is low.
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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.
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Turn OFF or disable any of the following systems that may put a load on the vehicle battery:
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Daytime running lamps (DRL). Applying the parking brake, on most vehicles, disables the DRL system. Refer to the Owner's Manual.
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Engine cooling fans, etc.
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The ignition switch is in the proper position. The scan tool requests that you turn the ignition ON with the engine off. Do NOT change the position of the ignition switch unless you are requested to do so.
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All of the following tool connections are secure:
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The connection at the data link connector (DLC)
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The voltage supply circuits
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DO NOT disturb the tool harnesses while programming. If an interruption occurs during the programming procedure, programming error or control module damage may occur.
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If the engine control module (ECM) needs to be replaced, the following procedures must be performed:
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Before removing the old control module, perform the SPS function Prepare Control Module for Removal.
Note
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The Prepare Control Module for Removal function can only be performed when communication with the old control module is still possible.
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4.
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Perform the SPS function Engine Control Module - Programming and follow the on-screen instructions.
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5.
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Perform the SPS function Engine Control Module - Configuration & Setup and follow the on-screen instructions. On the screen Control Module - Configuration and Setup Function(s), select both control module Configuration/Reconfiguration and the appropriate control module Setup.
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7.
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Clear DTCs after completing the programming procedure.
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8.
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Start and run the engine.
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9.
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Using a scan tool, perform the Diesel Particulate Filter (DPF) Service Regeneration
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10.
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If the SPS function Prepare Control Module for Removal could not be performed, perform the following:
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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.
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If the engine control module (ECM) needs to be reprogrammed, the following procedures must be performed:
2.
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Perform the SPS function Engine Control Module - Programming and follow the on-screen instructions.
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3.
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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.
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Setup for Component Replacement
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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.
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Clutch Pedal Position Sensor
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If any of the following components are replaced, use a scan tool to perform the appropriate reset function.
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Accelerator Pedal Position (APP) Sensor
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Diesel Particulate Filter (DPF)
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Diesel Particulate Filter Pressure Sensor
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Exhaust Temperature Sensor
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Heated Oxygen Sensor (HO2S)
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Mass Air Flow (MAF) Sensor
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Exhaust Gas Recirculation (EGR) Valve
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Fuel Rail Pressure Sensor
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Crankshaft Position Sensor
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