Training Transmitters IMPORTANT: When training new transmitters ALL of the previously trained transmitters will be erased from the system memory, so have ALL required transmitters available before proceeding. NOTE: All system functions are disabled while in training mode. NOTE: Up to 10 transmitters may be trained at one time per vehicle. NOTE: Before starting work, read and understand all of the instructions 1. Stop the engine, and be certain the vehicle is not in the accessory mode. 2.