Automatic transmission control unit (Transmission Control Module, TCM) for Nissan X-Trail T31:
Part name: Automatic transmission control unit
Nissan Part Number: 31030-1XF0A, 31030-1XF0B, 31030-1XF0C
Manufacturers of compatible parts:
* Jatco (original manufacturer)
*Aisin
* Denso
Location:
*Located under the hood on the right side next to the battery.
Functions:
* Controls gear shifting in an automatic transmission.
* Receives input from various sensors such as throttle position sensor, speed sensor and transmission temperature sensor.
* Determines the correct gear shift timing based on input data and control parameters.
* Sends signals to transmission solenoids to activate the appropriate gears.
Signs of malfunction:
*Hard or delayed gear shifting
* Jerking or slipping of the transmission
*Transmission to neutral when accelerating
*Transmission related fault codes
Possible causes of the malfunction:
* Faulty sensors
* Breaks in electrical wiring
* Damage to the control unit
* Worn or faulty transmission mechanical components
Notes:
*The automatic transmission control unit is an important component and should not be attempted to be repaired or replaced by yourself.
* Replacing the control unit requires special knowledge and equipment.
* If you experience problems with shifting gears or other symptoms characteristic of a malfunction of the automatic transmission control unit, it is recommended to contact an authorized dealer or car service center.