Automatic transmission control unit (TCU) Hyundai Trajet
The Transmission Control Unit (TCU) is an electronic device that controls the operation of the automatic transmission in Hyundai Trajet vehicles.
Location
The TCU is usually located either under the hood or inside the automatic transmission itself. The exact location may vary depending on the year and model of Trajet.
TCU functions
The TCU performs the following functions:
* Monitoring input signals from sensors and switches
* Selecting the optimal gear shift mode
* Control of automatic transmission solenoids for gear shifting
* Identification and display of fault codes
* Interaction with other vehicle systems (for example, with the engine management system)
TCU types
There are several types of TCU used in Hyundai Trajet vehicles:
*TC800
*TC800A
* TCM-108
TCU Trouble Codes
The TCU can display trouble codes that indicate problems with the automatic transmission. The most common trouble codes include:
* P0700 – Malfunction in the automatic transmission control system
* P0715 – Electrical fault in the input shaft sensor circuit
* P0730 – Faulty transmission
TCU Diagnosis and Troubleshooting
Diagnosing and troubleshooting a TCU usually requires specialized diagnostic equipment and knowledge. If problems arise with the automatic transmission, it is recommended that you contact a qualified auto mechanic for diagnosis and repair.