Causes of the error “Incorrect automatic transmission gear ratio”:
* Software errors:
* Errors in the automatic transmission control unit
* Errors in engine ECU software
* Mechanical faults:
* Clutch slippage
* Worn or damaged gear teeth
* Deformation of shafts or automatic transmission housing
* Electrical faults:
* Short circuit or open circuit of speed sensors
*Wiring problems
* Incorrect automatic transmission installation:
* Installing an automatic transmission from an unsuitable car
* Incorrectly installed automatic transmission control unit
Consequences of the error:
* Incorrect gear shifting: The automatic transmission may shift into the wrong gears or not shift at all.
*Transmission Slip: The transmission may slip under load, resulting in loss of power and poor handling.
* Automatic transmission overheating: Gear slippage can lead to automatic transmission overheating
* Damage to the automatic transmission: Incorrect operation of the automatic transmission can lead to mechanical damage and costly repairs
Diagnosis and elimination:
1. Checking Error Codes: Read the error codes using an OBD-II scanner.
2. Checking the speed sensors: Make sure the speed sensors are working correctly.
3. Checking the mechanical part of the automatic transmission: Check the transmission fluid for signs of wear. Disassemble the automatic transmission to inspect the gears, shafts and clutches for damage.
4. Electrical wiring check: Check the electrical wiring for damage or short circuits.
5. Software update: Update the software of the automatic transmission control unit and engine ECU if there are updates available.
6. Installing the correct automatic transmission: Install an automatic transmission designed for a specific car model.
7. Automatic transmission calibration: After repairing or installing a new automatic transmission, it is necessary to calibrate it using diagnostic equipment.