Skip to content

The Importance of Automotive Transmission Testing

The Automotive Transmission Module (TCM) is also known as the automatic transmission shift solenoid. Once a failure occurs, there will be irreversible consequences. Car drivers should regularly conduct a comprehensive overhaul of the car, including ECU, engine control unit, TCM electrical components, etc.

How Does A Car Gearbox Work?

The automotive transmission control module is mainly responsible for supervising the normal operation of the transmission and the drive axle, receiving information from various sensors in the form of sensor data, and then processing and modifying it to generate specific signals and instructions. The Autel MD806 pro scanner can provide users with diagnosis of four major systems (engine, transmission, ABS and airbag (SRS) system).

Why Is It Important To Test A Car Transmission?

1. No change in switching from low to high

In the normal driving state of the car, the driver may produce a continuous and smooth shifting pattern. However, drivers should be vigilant if they experience acceleration problems after shifting into a higher gear and engaging the transmission.

2. The TCC regulating valve is damaged

The phenomenon of damage to the gear set of the car is that the gear cannot be shifted, the shifting is uneven, the body shakes, and the instrument panel lights up the fault light.

3. Inability to enter low or reverse gear

When your car's driveshaft isn't working properly, your car can't go into a low or reverse gear. This is not necessarily a problem with the car's transmission control module.

4. Throttle position sensor failure

A faulty throttle position sensor can cause no shifts when the throttle is wide open and shifts when you take your foot off the throttle. This can be caused by a sharp increase in line pressure in the transfer hoses and cooling lines.

5: Sudden transformation

Car driving shifts are no longer smooth and seamless. This includes poor starts, lack of first or fourth gear, and TCC locking when shifting. If your vehicle shows any of these signs, the transmission may be in limp mode, or the vehicle's electrical system may be malfunctioning. Most cars have a safety feature called "limp mode" that kicks in when the transmission control unit detects an obvious problem that could cause more damage to your car.

The necessity to reset the transmission control module may be indicated by a number of indications. Any of these symptoms may indicate that your TCM is malfunctioning or completely damaged.

Transmission Control Module Reset

A car's transmission problem can be identified with a car inspection tool, and the Autel scanner's code-reading capability is primarily used to read error codes to find the problem.

Even more powerful is the Autel OBD II Diagnostic Scanner, an extremely useful diagnostic device that allows technicians to troubleshoot electrical issues while the transmission is still connected to the car. Diagnostic scanners can often achieve a comprehensive inspection of the car, support more than ten kinds of reset services, and truly realize a comprehensive inspection of the car.

To realize the reset of the automobile transmission control module, the error code of the automobile transmission control module must be read correctly first. For a simple Autel scanner, I recommend the Autel AL519, and if you want a more powerful Autel diagnostic scanner, the Autel MaxiCOM MK808BT.As an important automotive electrical component, the gearbox should not be disassembled by yourself, but must be carried out in the company of a professional.

Previous article Why Is Your Car Engine Light On?
Next article BMW F10 CAS4/CAS4+ How to Add key with Autel MaxiIM IM608

Latest Posts

  • Autel Ultra EV
    January 11, 2023

    Best EV Diagnostic Tool: Autel Maxisys Ultra EV

    Autel Maxisys Ultra EV, the best tool for electric vehicle diagnosis. A new generation of scanning diagnostic equipment capable of intelligent diagnosis of electric, hybrid, gasoline and diesel vehicles, Autel MS Ultra EV is a combination of Autel MS Ultra and EV Diag Kit.
    Read now
  • Autel MaxiIM IM508
    December 6, 2022

    IM508 Update Introducing: IM508S

    Autel brings an upgraded version of IM508 with effectively improved processing chip and customized Android version at the end of 2022. IM508 II product supports 5.0Ghz wireless network link, IM508S is one of the great breakthroughs achieved based on IM508.
    Read now