Automatic transmission control unit (TCM) for Mazda Demio DW3W
Part Number:
*FNR5-21-590A
Compatibility:
* Mazda Demio DW3W (2007-2014) with 4-speed automatic transmission
Location:
The automatic transmission control unit is located in the engine compartment, usually next to the battery.
Functions:
* Gear shift control
* Automatic transmission condition monitoring
* Data exchange with other electronic control units of the car
Replacement:
Replacing the automatic transmission control unit requires special tools and knowledge. It is recommended to seek professional assistance from a service station.
Troubleshooting Tips:
*If the vehicle does not shift gears properly or the automatic transmission warning light is on, this may be a sign of a faulty control unit.
* Before replacing the automatic transmission control unit, check the connectors and wiring for damage.
* Resetting the automatic transmission can sometimes solve minor shifting problems.
*If the TCM fails, it must be replaced.