Transmission Module : The transmission module is another name for a transmission computer on an automobile. The transmission module is specially designed to receive the inputs and compute the outputs for the transmission to shift and downshift properly. The inputs may include an input speed sensor, output speed sensor, turbine sensor, vehicle speed sensor, pressure switches, transmission temperature sensor, throttle position switch, gear position sensor and various other switches. The outputs may include line pressure solenoids, shift solenoids, torque converter lock-up solenoids, lights on the dash or shifter and other transmission solenoids. All of the sensors, switches and other transmission related circuits with the transmission module help a transmission propel your car, truck, van or suv down the road.
Transmission modules are made up of various transistors, computer chips, resistors, capacitors and other electronic circuits on a manufacturer specific circuit board. Many transmission modules will require a reset procedure after transmission repairs or replacements have been performed. Most transmission modules also are linked up to the other computers on the data bus of the vehicle enabling the other modules to communicate with the transmission module and also enable a mechanic to diagnose any transmission electronic problems.
Most transmission modules must be programmed to the specific make and model vehicle it belongs to. If the transmission module requires programming or reprogramming, special manufacturer , or in some cases aftermarket flash programmers, must be used in conjunction with manufacturer specific software to be downloaded and installed on the transmission module. Transmission modules are commonly found on automatic and cvt transmission systems and mostly on 1995 and above vehicles.
When a transmission module fails, there are several things that can happen. A common failure is a self test that the transmission module performs and gives a checksum error of hardware error on a diagnostic machine. Other failures may include a transmission code that is not repairable by replacing a sensor, switch or solenoid alone. A wiring or electrical problem caused the transmission module to fail or the transmission failed due to improper signals given by the bad transmission module.
Diagnosing and or replacing a transmission module requires a skilled mechanic and lots of special diagnostic equipment and or factory diagnostic machines. A warning to a driver may include a transmission shifting improperly or not at all. Other warnings may include a check engine lamp or flashing transmission position lamps or a transmission warning lamp illuminated. If you suspect a transmission module failure or other transmission problem, make an appointment today at Guy’s Automotive and let their expert mechanics diagnose and or repair your problem today.