Method for detecting damage in the shift-control actuator of an automated manual transmission

A method for detecting damage in-a shift-control actuator of an automated manual transmission, comprising at least one of the following steps:

• (a) determining an actual time period required for synchronizing a gear;
• comparing the actual time period to a nominal time period for synchronizing the gear, and determining whether damage is present in the shift-control actuator, the existence of damage being determined when the actual time period deviates from the nominal time period;
• (b) moving the shift-control actuator up to a limit stop following engagement of the gear or another gear;
• determining whether the limit stop reached is an internal limit stop of the shift-control actuator or a limit stop of a gear transmission;
• and establishing whether damage exists in the shift-control actuator, the existence of damage being determined when the limit stop reached is an internal limit stop of the shift-control actuator;
• and
• (c) determining an actual engine speed during an overlap phase comparing the actual engine speed to a speed range within which the engine speed is expected during the overlap phase, and determining whether damage exists in the shift-control actuator, the existence of damage being determined when the actual speed is not within the range that includes the expected speed.