Self-diagnosis of Toyota automatic transmission
Required tools:
* OBDII diagnostic scanner
* Toyota repair manual for your car model
Self-diagnosis procedure:
1. Close the contacts of the diagnostic connector
* Locate the diagnostic connector under the dashboard on the driver’s side.
*According to the repair manual, locate the TC and CG pins.
* Connect these contacts using a paper clip or other conductor.
2. Turn on the ignition
* Do not start the engine.
* Turn the ignition to the “ON” position.
3. Read fault codes
* Connect the OBDII diagnostic scanner to the connector.
* Turn on the scanner and wait until it establishes a connection with the vehicle’s ECU.
* Select the trouble code diagnostic function.
* Read and write down the displayed fault codes.
4. Troubleshoot
* Decipher fault codes in the Toyota repair manual.
* Troubleshoot according to instructions.
* Reset fault codes after troubleshooting.
5. Check the operation of the automatic transmission
* Start the engine.
* Shift the gear lever to different positions.
* Check for smooth gear shifting and absence of extraneous noise.
*If automatic transmission problems persist, consult a qualified mechanic.
Note: Trouble codes may vary depending on Toyota model and year. Always check your repair manual for specific information.