Your car computer also referred to as ECM (Electronic Control Unit), works by learning a car’s engine system. It controls components of your car such as ignition, fuel, and emission system. Sometimes the car computer may malfunction, and you may be left wondering how to reset car computer without disconnecting battery. It is not a tough task to reset a car ECM, and you don’t have to spend money hiring a professional. In this article, we will provide you with useful tips on how you can reset your car computer without disconnecting the battery.
How to Reset Car Computer Without Disconnecting Battery
Step 1: Switch off your car battery
Before you turn off the car, drive it for around 15 minutes, which helps warm up the engine. From there, turn off the car and remove both battery terminals to switch it off. This will ensure no power passes through the battery while resetting the car computer.
Step 2: Remove the fuse from the fuse box
Next, look for the fuse panel, and if it is hard to trace you can consult with the car’s manufacturer manual. Once you locate the car’s fuse box, remove the fuse, which is labeled ECM.
Step 3: Leave the fuse out for 15 seconds before you reinstall them
The fuse which you removed in step 2 should stay for a couple of seconds before you reinstall them. Additionally, ensure that the battery terminal which you disconnected is reconnected.
Step 4: Test drive for 30 minutes after performing the above steps
After following the above steps, the final thing you need to do is a test drive your car so that the ECM can check sensors and document results once more. It is important you confirm that the check engine light is off.
A defective car computer can adversely affect the performance of a vehicle. It doesn’t matter whether you have an electric, petrol or diesel car; performing the above steps can help correct the error cords of your car’s ECM.