Diagnostics of automatic transmission Toyota Corolla 150 body
Visual inspection:
* Check the automatic transmission for oil leaks, rust or other signs of damage.
* Check the level and condition of the transmission fluid.
* Check the condition of the wiring and connectors.
Reading fault codes:
* Connect the diagnostic scanner to the OBD-II connector.
*Retrieve fault codes and record them for further analysis.
Checking work:
* Start the engine and shift slowly through all gears.
*Note any slipping, shifting delays, or unusual noises.
* Check the torque converter lockup during acceleration.
Sensors and solenoids:
* Check the serviceability of the speed and gear selector position sensors.
* Check the operation of the shift and torque converter lockup solenoids.
* Measure the resistance and voltage at the appropriate terminals.
Hydraulic system:
* Check the pressure in the automatic transmission lines using a pressure gauge.
* Check the condition of the hydraulic filter and clean it if necessary.
* Check the operation of the pump and accumulators.
Mechanical system:
* If necessary, remove the automatic transmission and disassemble it.
* Check the condition of friction discs, steel plates and other mechanical components.
* Check gears and bearings for wear.
Electronic control unit (ECU):
*Check power and ground connections to the ECU.
* Measure the voltage and frequency of the signals at the corresponding terminals.
*If necessary, reprogram or replace the ECU.
Other possible diagnostic tools:
* Software for automatic transmission diagnostics
* Oscilloscope
* Multimeter
* Tool kit for automatic transmission repair