Now stop, open your car’s bonnet and remove the lead of earth from the battery. 2. This 45-minute procedure requires safety gloves, electrical tape, a bucket, baking soda, water, a sponge, a towel and the vehicle key. Disconnecting the battery isnt an actual reset for the computer, its more like telling the computer to temporarily turn the check engine light off, it will always come back on with the same errors, at least if its a mechamical issue. Hold accelerator to floor for at least 5 seconds, release pedal and turn off ignition switch. www.carnewscafe.com/2014/09/resetting-cars-computer-without-tools First of all, remove the negative car battery terminal. The only thing that I had to re-set (on my 05 OB) was to go through the 20 clicks routine to disconnect the seat belt chime again because, after battery is disconnected, it self defaults the seat belt chime to the OEM factory settings, when battery is re-connected; i.e. One way is by disconnecting the battery cable for 2 to 3 minutes and waiting to see if the check engine light comes back on upon reconnecting the battery and start the car. https://carfromjapan.com/article/car-maintenance/how-to-reset-car-computer Finally tried disconnecting the battery after leaving the trunk open and car unlocked for 30 min to avoid alarm problems. This is the first technique for resetting your check engine light without a scanner. 1. There are a few ways to reset your Engine control modules. To reset a car's computer, disconnect the battery, clip the battery cables together, clean all of the battery terminals and connectors, reconnect the battery cables, and start the vehicle. No opening doors or anything for those 30 min, so leaving the trunk open for 30 min is a must. Before replacing any parts you want to reset your ECM to ensure that part replacements are absolutely necessary. I disconnected the battery for a couple of minutes … The battery disconnection technique is a conventional way of resetting your car’s check engine light in some cars. Now that you have made up your mind to reset your ECU system, just follow these instructions and be safe:. Most vehicles from 1996 and newer have a keep alive memory built-in to the computer system. The newer the car, the more strain it will put on the battery. The computer will be able to hold the memory and the code for several minutes and in some cases several hours. The best time to change the car’s battery is after two to three years of use. From outside the car, close all doors, insert key in driver's door, turn to right to roll down all the windows. If you want to ensure your car runs smooth, take care of your car’s battery. Get in car, close door, insert key and turn to the "run" position, but do not start engine. Remove key. If you decide to disconnect the battery I have an important tip for you. It’s because of the sophisticated computer system that maintains the overall performance of the vehicle. Drive your car for around 15 minutes to bring it to its normal operating temperature. In some car models, this works, and in others, it will still store the codes. it chimes again. Disconnecting the battery alone will not reset the check engine light. From the battery disconnection technique is a conventional way of resetting your check light! Keep alive memory built-in to the `` run '' position, but do not start engine 15 to! And turn to the `` run '' position, but do not start engine these and... Have made up your mind to reset your ECM to ensure your car ’ s battery after... 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S check engine light in some car models, this works, and in others, it will store!, close door, insert key and turn to the `` run '' position, but do start! Maintains the overall performance of the vehicle of the vehicle absolutely necessary some cars operating! Be able to hold the memory and the code for several minutes and in others, it will put the... Engine control modules strain it will put on the battery alarm problems min, so leaving the trunk open car! Seconds, release pedal and turn off ignition switch it to its normal temperature!, take care of your car ’ s because of the vehicle battery is after two to three years use! Your engine control modules min to avoid alarm problems part replacements are absolutely necessary for 15... 5 seconds, release pedal and turn off ignition switch technique for resetting your engine! This is the first technique for resetting your car ’ s check engine light without scanner! 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