Reasons for failure of the automatic transmission control unit:
* Overheating due to a malfunction of the engine cooling system or automatic transmission
* Short circuit in electrical wiring
* Vibrations and shocks
* Moisture or corrosion
* Poor installation or repair
* Damage to internal components (such as transistors, diodes or capacitors)
* Use of unsuitable automatic transmission fluid or lack of it
Symptoms of a faulty automatic transmission control unit:
* Gears do not shift or shift with a delay
* Gears jump around or don’t engage at all
*Loss of power or reduction in torque
* Automatic transmission fault indicator lights up
* Sharp shocks or vibrations when shifting gears
* Noise or hum from automatic transmission
Consequences of failure of the automatic transmission control unit:
* Inability to use the car
* Significant repair costs
* Damage to other automatic transmission components
Diagnostics:
Diagnosis of a faulty automatic transmission control unit usually includes:
* Read fault codes
* Checking electrical wiring, connectors and grounding
* Measure voltage, resistance and sensor signals
* Visual inspection of the control unit
Repair:
Repairing an automatic transmission control unit is often a complex and expensive process. It may include:
* Replacement of faulty components
* Software reprogramming or replacement
* Replacement of the entire control unit
Prevention:
To prevent failure of the automatic transmission control unit, follow these recommendations:
* Maintain your automatic transmission regularly, including replacing the fluid and filter.
* Monitor the temperature of the engine and automatic transmission and eliminate any malfunctions in the cooling system.
* Avoid overload and sporty driving style.
* Use the transmission fluid recommended for your automatic transmission.
* Install and maintain automatic transmissions from qualified specialists.