To diagnose the Subaru Forester SF5 automatic transmission, follow these steps:
1. Place the gear selector lever in the “P” (park) position.
2. Turn off the engine.
3. Press and hold the brake pedal.
4. At the same time turn the ignition key to the “ON” position and hold it in this position.
5. Without releasing the brake pedal, move the gear selector lever to the “D” (drive) position.
6. Move the gear selector lever back to the “P” (park) position.
7. Release the brake pedal.
8. Press and hold the brake pedal again.
9. Press and release the accelerator pedal 5 times within 5 seconds.
10. Release the accelerator and brake pedal.
Reading fault codes:
After completing these steps, the display on your dashboard will begin to show trouble codes. The codes will be presented as flashing digital numbers.
* The first digit indicates the type of error (mechanical or electrical).
* The second digit indicates the part of the automatic transmission where the error occurred.
* The third digit indicates a specific fault.
For example:
*Error code 123 indicates a mechanical error (1) in the torque converter (2) and refers to a fault in the torque converter lock-up (3).
Resetting fault codes:
After reading the fault codes, they can be reset by following these steps:
1. Turn off the ignition.
2. Press and hold the accelerator pedal.
3. Turn the ignition key to the «ON» position and hold it in this position.
4. Keep the accelerator pedal depressed for 10 seconds.
5. Release the accelerator pedal and ignition key.
Fault codes must be reset.