The automatic transmission has made driving much easier and comfier when compared to the classic manual gearboxes. While a manual transmission didn’t have that many glitches and problems, automatic gearboxes brought their share of problems. If the transmission issues are minor, it is good to know how you reset a transmission control module.
The most effective way to reset the TCM is simple: turn the ignition key on, but do not start the engine. Press the gas pedal to the maximum for 10 to 15 seconds. Turn off the key and release the accelerator pedal. Wait between 2 and 5 minutes before you start the car. Drive the car for at least 20 minutes. In some cases, you can restart the TCM by unplugging the battery, and again reconnecting it.
Resetting the transmission control module can resolve less significant issues. If the transmission is still not working as it should, do not wait to visit the mechanic. For further information about this problem, stay with us.
What is a TCM Transmission Control Module?
For every car to move it needs a working engine and the transmission. These major systems need to communicate. Switching gears must be done at proper times, and done smoothly. There comes the transmission control module (TCM).
The TCM is communicating with the engine control unit at all times. It monitors the engine speed, the RPMs, and the gears. It also monitors and adapts to drivers driving habits. The task of the transmission control unit is to keep the car in the right gear to maximize fuel efficiency and power output.
When the TCM is not working properly the driver will notice several symptoms:
- Poor fuel economy
- Check engine light is on
- Delayed shifting
- Stuck in the same gear
- Problems with shifting into higher gears
Benefits of TCM in Modern Cars
The TCM in automatic transmissions has several memory blocks that have implemented operational logic for different driving patterns. That feature improves fuel efficiency, reduces dangerous emissions, and improves power output.
Other important features of the TCM are diagnostics in real-time, and saving any diagnostic error codes. It is also a fine-tuning of the drive, making the everyday use of the car as comfortable as possible.
Check Out the Symptoms of a Bad Transmission Control Module:
What Does Resetting TCM Do?
Every computer can pick up a glitch from time to time. The TCM is no different. Some problems with the work of the transmission are the result of a glitch in the software. A simple resetting of the TCM may solve your issue. It will return the state of the TCM into a previous state, and erase any software issues.
When To Reset a Transmission Control Module?
Resetting the TCM may solve smaller glitches with the gearbox like:
- Gear shifts into the wrong gear
- Slipping of the gear
- Erratic shifting of the gears
- Inability to switch into gear from neutral
- Sticky feel when upward switching gears
- Problems with acceleration during driving
Resetting the TCM is not a universal way to solve issues with the transmission. If you notice that the symptoms remain, visit a mechanic. He will do a detailed diagnostic of the transmission to check for internal transmission issues.
Easy 5 Steps to Reset a Transmission Control Module
This method of resetting the TCM is most common and most efficient. It may differ between car manufacturers, but the principle is the same:
- Turn the ignition on, but do not start the car
- Push the acceleration pedal to the maximum and keep doing it between 10 and 15 seconds
- Turn off the ignition key
- Do not start the car or any system for 2 to 5 minutes
- Restart the car and drive for at least 20 minutes. The TCM will monitor your driving style, and adapt its work to it.
If this reset process doesn’t give results, then you should visit a professional. An underlying serious issue may be lurking. Check the transmission just to be sure.
Check Out How To Reset All ECU and Control Modules in your Car or Truck:
Alternative Methods: Using an OBD2 Scanner
Besides the standard procedure to reset the transmission control module, you can reset it with an OBD II scanner.
How An OBD2 Scanner Can Assist with Resetting Your TCM?
Regular drivers rarely rely on OBD-II scanners to reset the transmission module. To be able to reset the TCM with an OBD-II scanner you will need to have an appropriate scanner. Not every OBD-II scanner has this option. Scanners with this option are expensive tools that tend to cost more than $1,000. It hardly makes economic sense to buy one.
Better mechanic shops and car electricians have these scanners, so if you want to do it, that is the way. We would not advise anyone to buy this type of scanner just to reset the TCM.
How To Use an OBD2 Scanner for TCM Reset
The OBD-II scanner is connected to the car’s computer. The scan tool will list all the errors if any. If it finds any error codes connected with the TCM it can simply delete it. The usual error codes connected with the TCM are P0631, P0700, and P0706.
How Long Does It Take To Reprogram A Transmission?
If you take the car to the professional it can take up to 30 minutes. A mechanic will check the manufacturer’s recommendations and will have the right tools. That way the reset procedure is done faster.
Can You Reset TCM by Disconnecting The Battery?
Yes, you can reset TCM by disconnecting the battery. Unfortunately, it may not resolve the underlying issue that is causing the problems with the gearbox. It can delete any fault codes that exist, but it won’t fix a serious problem.
When to Seek Help From A Professional Mechanic
If the same symptoms remain after you have already reset the TCM, then you should contact the mechanic for repair of the transmission. Problems can be in a faulty transmission shift solenoid, excessive heat or vibration, or worn TCM wiring. You should leave these problems to the mechanic.
Tips to Keep Your Transmission Control Module in Optimal Condition
Several tips will help keep the TCM working well for a long time:
- Clean it and dry it regularly
- Blow the engine to remove any debris from the TCM
- Prevent rodents from messing around the TCM wiring and electrical components
- Find a place for your car where the engine compartment can properly cool.
Check Out GM TCM (Transmission Control Module) Programming (SPS1 Old system):
FAQs
How Can I Reset a Chrysler Transmission Control Module?
The process for resetting a Chrysler TCM is the same as for most cars:
1. Turn the ignition key on, but do not turn on the engine.
2. Press the gas pedal to the maximum for around 10 to 15 seconds.
3. Turn off the key, and release the gas pedal.
4. Stay in the car without starting any systems for about 5 minutes.
5. Turn on the car and drive it for about 20 minutes so the TCM picks up your driving style.
Do you need to reset a new transmission control module after installing one?
Yes, in most cases you need to reset a new transmission control module after its installation. This is done so the TCM software can be configured to work with the specific vehicle model. If you do not reset it, that may cause problems like hindered engine performance. It is recommended to contact a mechanic for this process.
Can you reprogram a faulty TCM?
Yes, you can reprogram a faulty TCM if the problems are not too serious. This is the first step in resolving issues with the TCM. If reprogramming doesn’t help, then comes further diagnostics and eventual replacement of the TCM.
What happens if I disconnect my TCM?
If you disconnect the TCM, you will have a car whose transmission is not working. You will not be able to drive the car at all. The TCM is essential in connecting the engine and the transmission. Without it, the car cannot work.
Final Considerations
The transmission control module has become one of the key elements of every modern vehicle. If you notice strange symptoms when shifting gears, you can try to reset the TCM. But, if the problems do not go away, you should pay a visit to a mechanic.
Reprogramming a TCM can cost between $75 and $300, while a new TCM will cost between $210 and $1,100. Resolve this issue quickly because, without the TCM, the car won’t work at all. Stay with us for further mechanical pieces of advice!
)
