Toyota automatic transmission diagnostics
Visual inspection:
* Check the transmission pan for leaks, deformation or damage.
* Inspect the condition of the transmission fluid. It should be red and free of impurities.
Diagnostics using a scanner:
* Connect the scanner to the OBD2 diagnostic connector.
* Read fault codes related to automatic transmission.
* Check real-time data such as transmission fluid temperature, line pressure and engine speed.
* Perform a solenoids test to check their functionality.
Driving:
* Drive the car and pay attention to the following signs of automatic transmission malfunction:
* Jerks or slipping when changing gears
*Hum, vibration or noise
* Difficult or delayed gear shifting
* Transmission fluid leaks
* Automatic transmission overheating
Mechanical check:
* Raise the car and start the engine.
* Shift the gear selector and check whether the driveshaft rotates.
* Check the integrity of the drives and their condition.
* Make sure there is no extraneous noise when the wheels rotate.
Electrical test:
* Check the automatic transmission solenoid and sensor connectors for corrosion or damage.
* Check the voltage and grounding at the automatic transmission connectors.
* Check the resistance and integrity of the automatic transmission wiring.
Other diagnostic methods:
*Checking the transmission fluid level: Check the fluid level with the engine warm and with the engine running.
*Transmission Fluid Analysis: Take a sample of the fluid and check for metal shavings, a burning odor, or cloudiness.
* Check Vacuum and Hydraulic Lines: Make sure there are no leaks or damage in the vacuum and hydraulic lines connected to the automatic transmission.
Note: The accuracy and reliability of diagnostics largely depend on the availability and correct use of the necessary equipment and the experience of the specialist. For comprehensive diagnostics and repair of automatic transmissions, it is recommended to contact an authorized Toyota service center.