Engine Control Module Programming and Setup - LXV, 2H0
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 service bulletin. Programming a control module at any other time will not permanently correct a customers concern.
The following criteria must be met before performing the programming or learning procedure:
| • | 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 failure or control module damage. |
| • | Turn OFF or disable any of the following systems that may put a load on the vehicle battery: |
| - | 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 failure or control module damage may occur.
ECM Replacement
If the engine control module (ECM) is replaced, the following procedures must be performed:
- Connect a scan tool to the vehicle and access SPS. Refer to Service Programming System (SPS) .
Note: The Prepare Control Module for Removal function can only be performed when communication with the old control module is still possible.
- Before removing the old control module, perform the SPS function Prepare Control Module for Removal.
- Replace the ECM.
- Perform the SPS function Engine Control Module - Programming and follow the onscreen instructions.
- 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.
- Perform the SPS Function Immobilizer Learn. Refer to Immobiliser System Component Programming .
- Clear DTCs after completing the programming procedure.
- Start and idle engine.
- 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:
- Connect a scan tool to the vehicle and access SPS. Refer to Service Programming System (SPS) .
- Perform the SPS function Engine Control Module - Programming and follow the onscreen instructions.
- 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.
To speed up the learn process perform the scan tool Fuel Trim Reset function if any of the following components are replaced:
| • | Manifold absolute pressure sensor |
| • | Accelerator pedal position sensor |
| • | Crankshaft position sensor |
| • | Camshaft position sensor |
| © Copyright Chevrolet. All rights reserved |
| © Copyright Chevrolet. All rights reserved |
