Engine Control Module: Testing and Inspection
This is the exact OEM manual section for the path above. Use the breadcrumb to move up or down the tree until you reach the precise year, make, model, and subsystem you need.
Need a step-by-step guide?
Get an AI-powered repair guide with parts lists, cost estimates, and clear instructions for your 2009 Chevrolet.
Revenue RailIntent: manual
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
More supporting gear
Torque wrench
Use the factory procedure with the right tightening tool.
Manual-based work becomes much easier when you can torque correctly.
Shop on Amazon →Trim tool set
Useful for clips, covers, and trim pieces called out by the manual.
Most manual procedures assume you have a good trim removal kit.
Shop on Amazon →Multimeter kit
Great for electrical troubleshooting and manual-tested circuits.
Electrical work in manuals often needs a meter more than another wrench.
Shop on Amazon →Engine Control Module Programming and Setup (V6)
The following service procedures require either a programming or a setup event performed for a complete repair.
ECM Replacement and Reprogramming
If the engine control module (ECM) is replaced or reprogramed, the following procedures must be performed:
1. ECM Reprogramming-Refer to Service Programming System (SPS) (Programming and Relearning).
2. Idle Learn Procedure-Refer to Throttle Learn (Programming and Relearning).
3. Theft Deterrent-Refer to Immobilizer System Component Programming (Programming and Relearning). The ECM will learn the incoming fuel continue password immediately upon receipt of a password message. Once a password message is received, and a password is learned, a learn procedure must be performed to change this password again. An ECM which has been previously installed in another vehicle will have learned the other vehicle's fuel continue password, and will require a learn procedure after programming to learn the current vehicle's password.
4. Engine Oil Life Remaining-When available, use a scan tool to reset the Engine Oil Life Remaining back to the original percentage recorded before the module was replaced.
5. Transmission Fluid Life Remaining-When available, use the scan tool to reset the Transmission Fluid Life Remaining back to the original percentage recorded before the module was replaced.
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, an Idle Learn Procedure must be performed. Refer to Throttle Learn (Programming and Relearning).
* Throttle body assembly
* ECM