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How To Reset Transmission Control Module

A Transmission Control Module, or TCU for short, is a computer chip that makes your car work. When something goes wrong with it, you may experience transmission problems. This article will show you how to reset a TCU in your car, should you ever find yourself in this predicament. By following these simple steps, you can get your car back on the road in no time.

What is a Transmission Control Module?

A transmission control module (TCM) is a computerized system that manages transmissions in a vehicle. When the TCM detects a problem with the vehicle’s transmission, it will initiate a reset to correct the issue. This can be done by pressing the appropriate buttons on the shift lever, sending signals to the gearbox or engine, or both.

How to Reset a Transmission Control Module

If your car is having trouble starting, there’s a good chance that the transmission control module (TCM) is malfunctioning. TCMs are responsible for controlling the gears in a car and can sometimes go out of commission when they’re not treated properly. Here’s how to reset a TCM:

1) Park your car in a safe place.
2) Remove the battery cable.
3) Disconnect all power sources to the car, including the AC adapter if you have one.
4) Open the hood and locate the TCM. It should be located on top of the engine near where the coolant enters it.
5) Locate and unscrew the black plug on top of the TCM. This will allow you to access and reset it.
6) Resetting a TCM will require you to use special tools that are not usually found in an average garage, so be prepared to head to a mechanic if you don’t have them on hand. Once it’s been reset, replace the black plug and reconnect all power sources to your car.

What to do if a Transmission Control Module fails

If a transmission control module fails, the car will not start. The procedure for resetting the TCM is as follows: Disconnect the negative battery cable. Verify that all fuses are in their proper position and are properly connected. Turn on the ignition switch to “ON”. Start the engine and let it idle for about 10 seconds. Turn off the engine and disconnect the positive battery cable. Disconnect both air conditioner blowers. Remove the screws that hold down the TCM cover. Carefully pull up on the TCM cover and disconnect it from the wiring harnesses. Replace any failed components, then reinstall the TCM cover screws and reconnect all wiring harnesses. Reconnect both air conditioner blowers. Reinstall the TCM cover screws and connect negative battery cable.


If you’re having trouble with your car, it’s probably a good idea to reset the transmission control module. This DIY guide will walk you through the process of resetting your TCM. Whether your car is slipping and grinding or just not running as smoothly as it should, aTCM reset can often solve the problem. So be sure to check out this guide for all the details on how to do aTCM reset on your vehicle.