How to Fix a Busted Chevrolet Engine Control Module
Even the car has brains and it comes in the form of the ECM or the engine control module. The ECM receives signals from different sensors, and through these information, it sends commands and regulates the overall vehicle operation. However, the ECM may at times need to be reset or reprogrammed. This will correct some of the issues. But if the ECM-related problems persist and the vehicle starts acting up as your Chevrolet engine control module fails, you'll need to replace it. If you have no idea how to fix the ECM, check out this step-by-step guide. You may be surprised to find out that the job isn't as complicated as you may think. This can be completed in just a few minutes.
Difficulty level: Easy
Things you'll need:
- Adjustable wrench
- New ECM
- Socket wrench
- Socket set
Resetting the engine control module
Step 1: Disconnect the negative cable from the car battery's negative terminal and do the same for the positive cable. Use an adjustable wrench for unscrewing or disconnecting wires, or you may have to unscrew a retaining bolt with a socket wrench. See how cables are clamped onto the terminals. You have to deactivate the main electrical power source to reset the ECM.
Step 2: Wait around 5 to 10 minutes. Let residual power be drained out of the vehicle. This will wipe the ECM memory.
Step 3:Re-attach the disconnected cables to the battery. This will reset the ECM.
Replacing an ECM
Step 1: Read your vehicle manual. Before you do any DIY auto project, it's highly advised that you consult this first and use it as a guide. This will give you an idea where the part is located. Take note of other essential details or specs.
Step 2:Disengage the wiring or cables from the battery using a socket wrench.
Step 3:Locate the ECM. Your vehicle manual can be used as a reference.
Step 4:Disconnect the electrical power supply. Just move the locking tab upward and then peel it off from the computer. The electrical supply will be isolated by this.
Step 5:Remove the old ECM. Unlock the unit by removing the fasteners that keep this in place. You may use a socket wrench for this.
Step 6:Install the new ECM. Set this up and then bolt this right in using a socket wrench. Once everything is aligned, tighten the bolts to seal the new module in place.
Step 7:Connect the electrical wires to the new ECM. You have to push the wiring harness far enough until this locks in. Check if the unit is properly set in place.
Step 8:Put back the cables to the car's battery. Make sure that they're properly connected. The cables must be set in place and secured. Use a socket wrench.
Step 9:Crank the engine to start. Let this idle for about 5 minutes or so. By this time, you should be watching out for the codes. See if the check engine light will come on. Test-drive the vehicle to make sure that everything's well.